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Merge branch 'for-linus' of git://git390.marist.edu/pub/scm/linux-2.6

Browse source 
* 'for-linus' of git://git390.marist.edu/pub/scm/linux-2.6: (65 commits)
  [S390] prevent unneccesary loops_per_jiffy recalculation
  [S390] cpuinfo: use get_online_cpus() instead of preempt_disable()
  [S390] smp: remove cpu hotplug messages
  [S390] mutex: enable spinning mutex on s390
  [S390] mutex: Introduce arch_mutex_cpu_relax()
  [S390] cio: fix ccwgroup unregistration race condition
  [S390] perf: add DWARF register lookup for s390
  [S390] cleanup ftrace backend functions
  [S390] ptrace cleanup
  [S390] smp/idle: call init_idle() before starting a new cpu
  [S390] smp: delay idle task creation
  [S390] dasd: Correct retry counter for terminated I/O.
  [S390] dasd: Add support for raw ECKD access.
  [S390] dasd: Prevent deadlock during suspend/resume.
  [S390] dasd: Improve handling of stolen DASD reservation
  [S390] dasd: do path verification for paths added at runtime
  [S390] dasd: add High Performance FICON multitrack support
  [S390] cio: reduce memory consumption of itcw structures
  [S390] nmi: enable machine checks early
  [S390] qeth: buffer count imbalance
  ...
This commit is contained in:
Linus Torvalds 2011-01-07 14:50:50 -08:00
commit fb5131e188
95 changed files with 2996 additions and 1804 deletions
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130
arch/s390/Kconfig
View file

@ -1,13 +1,8 @@
config SCHED_MC
def_bool y
depends on SMP
config MMU
def_bool y
config ZONE_DMA
def_bool y
depends on 64BIT
def_bool y if 64BIT
config LOCKDEP_SUPPORT
def_bool y
@ -25,12 +20,10 @@ config RWSEM_XCHGADD_ALGORITHM
def_bool y
config ARCH_HAS_ILOG2_U32
bool
default n
def_bool n
config ARCH_HAS_ILOG2_U64
bool
default n
def_bool n
config GENERIC_HWEIGHT
def_bool y
@ -42,9 +35,7 @@ config GENERIC_CLOCKEVENTS
def_bool y
config GENERIC_BUG
bool
depends on BUG
default y
def_bool y if BUG
config GENERIC_BUG_RELATIVE_POINTERS
def_bool y
@ -59,13 +50,10 @@ config ARCH_DMA_ADDR_T_64BIT
def_bool 64BIT
config GENERIC_LOCKBREAK
bool
default y
depends on SMP && PREEMPT
def_bool y if SMP && PREEMPT
config PGSTE
bool
default y if KVM
def_bool y if KVM
config VIRT_CPU_ACCOUNTING
def_bool y
@ -85,7 +73,6 @@ config S390
select HAVE_DYNAMIC_FTRACE
select HAVE_FUNCTION_GRAPH_TRACER
select HAVE_REGS_AND_STACK_ACCESS_API
select HAVE_DEFAULT_NO_SPIN_MUTEXES
select HAVE_OPROFILE
select HAVE_KPROBES
select HAVE_KRETPROBES
@ -130,8 +117,7 @@ config S390
select ARCH_INLINE_WRITE_UNLOCK_IRQRESTORE
config SCHED_OMIT_FRAME_POINTER
bool
default y
def_bool y
source "init/Kconfig"
@ -144,20 +130,21 @@ comment "Processor type and features"
source "kernel/time/Kconfig"
config 64BIT
bool "64 bit kernel"
def_bool y
prompt "64 bit kernel"
help
Select this option if you have an IBM z/Architecture machine
and want to use the 64 bit addressing mode.
config 32BIT
bool
default y if !64BIT
def_bool y if !64BIT
config KTIME_SCALAR
def_bool 32BIT
config SMP
bool "Symmetric multi-processing support"
def_bool y
prompt "Symmetric multi-processing support"
---help---
This enables support for systems with more than one CPU. If you have
a system with only one CPU, like most personal computers, say N. If
@ -189,10 +176,10 @@ config NR_CPUS
approximately sixteen kilobytes to the kernel image.
config HOTPLUG_CPU
bool "Support for hot-pluggable CPUs"
def_bool y
prompt "Support for hot-pluggable CPUs"
depends on SMP
select HOTPLUG
default n
help
Say Y here to be able to turn CPUs off and on. CPUs
can be controlled through /sys/devices/system/cpu/cpu#.
@ -208,14 +195,16 @@ config SCHED_MC
increased overhead in some places.
config SCHED_BOOK
bool "Book scheduler support"
def_bool y
prompt "Book scheduler support"
depends on SMP && SCHED_MC
help
Book scheduler support improves the CPU scheduler's decision making
when dealing with machines that have several books.
config MATHEMU
bool "IEEE FPU emulation"
def_bool y
prompt "IEEE FPU emulation"
depends on MARCH_G5
help
This option is required for IEEE compliant floating point arithmetic
@ -223,7 +212,8 @@ config MATHEMU
need this.
config COMPAT
bool "Kernel support for 31 bit emulation"
def_bool y
prompt "Kernel support for 31 bit emulation"
depends on 64BIT
select COMPAT_BINFMT_ELF
help
@ -233,16 +223,14 @@ config COMPAT
executing 31 bit applications. It is safe to say "Y".
config SYSVIPC_COMPAT
bool
depends on COMPAT && SYSVIPC
default y
def_bool y if COMPAT && SYSVIPC
config AUDIT_ARCH
bool
default y
def_bool y
config S390_EXEC_PROTECT
bool "Data execute protection"
def_bool y
prompt "Data execute protection"
help
This option allows to enable a buffer overflow protection for user
space programs and it also selects the addressing mode option above.
@ -302,7 +290,8 @@ config MARCH_Z196
endchoice
config PACK_STACK
bool "Pack kernel stack"
def_bool y
prompt "Pack kernel stack"
help
This option enables the compiler option -mkernel-backchain if it
is available. If the option is available the compiler supports
@ -315,7 +304,8 @@ config PACK_STACK
Say Y if you are unsure.
config SMALL_STACK
bool "Use 8kb for kernel stack instead of 16kb"
def_bool n
prompt "Use 8kb for kernel stack instead of 16kb"
depends on PACK_STACK && 64BIT && !LOCKDEP
help
If you say Y here and the compiler supports the -mkernel-backchain
@ -327,7 +317,8 @@ config SMALL_STACK
Say N if you are unsure.
config CHECK_STACK
bool "Detect kernel stack overflow"
def_bool y
prompt "Detect kernel stack overflow"
help
This option enables the compiler option -mstack-guard and
-mstack-size if they are available. If the compiler supports them
@ -351,7 +342,8 @@ config STACK_GUARD
512 for 64 bit.
config WARN_STACK
bool "Emit compiler warnings for function with broken stack usage"
def_bool n
prompt "Emit compiler warnings for function with broken stack usage"
help
This option enables the compiler options -mwarn-framesize and
-mwarn-dynamicstack. If the compiler supports these options it
@ -386,24 +378,24 @@ config ARCH_SPARSEMEM_DEFAULT
def_bool y
config ARCH_SELECT_MEMORY_MODEL
def_bool y
def_bool y
config ARCH_ENABLE_MEMORY_HOTPLUG
def_bool y
depends on SPARSEMEM
def_bool y if SPARSEMEM
config ARCH_ENABLE_MEMORY_HOTREMOVE
def_bool y
config ARCH_HIBERNATION_POSSIBLE
def_bool y if 64BIT
def_bool y if 64BIT
source "mm/Kconfig"
comment "I/O subsystem configuration"
config QDIO
tristate "QDIO support"
def_tristate y
prompt "QDIO support"
---help---
This driver provides the Queued Direct I/O base support for
IBM System z.
@ -414,7 +406,8 @@ config QDIO
If unsure, say Y.
config CHSC_SCH
tristate "Support for CHSC subchannels"
def_tristate y
prompt "Support for CHSC subchannels"
help
This driver allows usage of CHSC subchannels. A CHSC subchannel
is usually present on LPAR only.
@ -432,7 +425,8 @@ config CHSC_SCH
comment "Misc"
config IPL
bool "Builtin IPL record support"
def_bool y
prompt "Builtin IPL record support"
help
If you want to use the produced kernel to IPL directly from a
device, you have to merge a bootsector specific to the device
@ -464,7 +458,8 @@ config FORCE_MAX_ZONEORDER
default "9"
config PFAULT
bool "Pseudo page fault support"
def_bool y
prompt "Pseudo page fault support"
help
Select this option, if you want to use PFAULT pseudo page fault
handling under VM. If running native or in LPAR, this option
@ -476,7 +471,8 @@ config PFAULT
this option.
config SHARED_KERNEL
bool "VM shared kernel support"
def_bool y
prompt "VM shared kernel support"
help
Select this option, if you want to share the text segment of the
Linux kernel between different VM guests. This reduces memory
@ -487,7 +483,8 @@ config SHARED_KERNEL
doing and want to exploit this feature.
config CMM
tristate "Cooperative memory management"
def_tristate n
prompt "Cooperative memory management"
help
Select this option, if you want to enable the kernel interface
to reduce the memory size of the system. This is accomplished
@ -499,14 +496,16 @@ config CMM
option.
config CMM_IUCV
bool "IUCV special message interface to cooperative memory management"
def_bool y
prompt "IUCV special message interface to cooperative memory management"
depends on CMM && (SMSGIUCV=y || CMM=SMSGIUCV)
help
Select this option to enable the special message interface to
the cooperative memory management.
config APPLDATA_BASE
bool "Linux - VM Monitor Stream, base infrastructure"
def_bool n
prompt "Linux - VM Monitor Stream, base infrastructure"
depends on PROC_FS
help
This provides a kernel interface for creating and updating z/VM APPLDATA
@ -521,7 +520,8 @@ config APPLDATA_BASE
The /proc entries can also be read from, showing the current settings.
config APPLDATA_MEM
tristate "Monitor memory management statistics"
def_tristate m
prompt "Monitor memory management statistics"
depends on APPLDATA_BASE && VM_EVENT_COUNTERS
help
This provides memory management related data to the Linux - VM Monitor
@ -537,7 +537,8 @@ config APPLDATA_MEM
appldata_mem.o.
config APPLDATA_OS
tristate "Monitor OS statistics"
def_tristate m
prompt "Monitor OS statistics"
depends on APPLDATA_BASE
help
This provides OS related data to the Linux - VM Monitor Stream, like
@ -551,7 +552,8 @@ config APPLDATA_OS
appldata_os.o.
config APPLDATA_NET_SUM
tristate "Monitor overall network statistics"
def_tristate m
prompt "Monitor overall network statistics"
depends on APPLDATA_BASE && NET
help
This provides network related data to the Linux - VM Monitor Stream,
@ -568,30 +570,32 @@ config APPLDATA_NET_SUM
source kernel/Kconfig.hz
config S390_HYPFS_FS
bool "s390 hypervisor file system support"
def_bool y
prompt "s390 hypervisor file system support"
select SYS_HYPERVISOR
default y
help
This is a virtual file system intended to provide accounting
information in an s390 hypervisor environment.
config KEXEC
bool "kexec system call"
def_bool n
prompt "kexec system call"
help
kexec is a system call that implements the ability to shutdown your
current kernel, and to start another kernel. It is like a reboot
but is independent of hardware/microcode support.
config ZFCPDUMP
bool "zfcpdump support"
def_bool n
prompt "zfcpdump support"
select SMP
default n
help
Select this option if you want to build an zfcpdump enabled kernel.
Refer to <file:Documentation/s390/zfcpdump.txt> for more details on this.
config S390_GUEST
bool "s390 guest support for KVM (EXPERIMENTAL)"
def_bool y
prompt "s390 guest support for KVM (EXPERIMENTAL)"
depends on 64BIT && EXPERIMENTAL
select VIRTIO
select VIRTIO_RING
@ -603,9 +607,9 @@ bool "s390 guest support for KVM (EXPERIMENTAL)"
the default console.
config SECCOMP
bool "Enable seccomp to safely compute untrusted bytecode"
def_bool y
prompt "Enable seccomp to safely compute untrusted bytecode"
depends on PROC_FS
default y
help
This kernel feature is useful for number crunching applications
that may need to compute untrusted bytecode during their

6
arch/s390/Kconfig.debug
View file

@ -1,8 +1,7 @@
menu "Kernel hacking"
config TRACE_IRQFLAGS_SUPPORT
bool
default y
def_bool y
source "lib/Kconfig.debug"
@ -19,7 +18,8 @@ config STRICT_DEVMEM
If you are unsure, say Y.
config DEBUG_STRICT_USER_COPY_CHECKS
bool "Strict user copy size checks"
def_bool n
prompt "Strict user copy size checks"
---help---
Enabling this option turns a certain set of sanity checks for user
copy operations into compile time warnings.

152
arch/s390/defconfig
View file

@ -2,16 +2,12 @@ CONFIG_EXPERIMENTAL=y
CONFIG_SYSVIPC=y
CONFIG_POSIX_MQUEUE=y
CONFIG_AUDIT=y
CONFIG_RCU_TRACE=y
CONFIG_IKCONFIG=y
CONFIG_IKCONFIG_PROC=y
CONFIG_CGROUPS=y
CONFIG_CGROUP_NS=y
CONFIG_SYSFS_DEPRECATED_V2=y
CONFIG_UTS_NS=y
CONFIG_IPC_NS=y
CONFIG_BLK_DEV_INITRD=y
# CONFIG_CC_OPTIMIZE_FOR_SIZE is not set
# CONFIG_COMPAT_BRK is not set
CONFIG_PERF_EVENTS=y
CONFIG_SLAB=y
CONFIG_KPROBES=y
CONFIG_MODULES=y
@ -20,24 +16,12 @@ CONFIG_MODVERSIONS=y
CONFIG_DEFAULT_DEADLINE=y
CONFIG_NO_HZ=y
CONFIG_HIGH_RES_TIMERS=y
CONFIG_64BIT=y
CONFIG_SMP=y
CONFIG_NR_CPUS=32
CONFIG_COMPAT=y
CONFIG_S390_EXEC_PROTECT=y
CONFIG_PACK_STACK=y
CONFIG_CHECK_STACK=y
CONFIG_PREEMPT=y
CONFIG_MEMORY_HOTPLUG=y
CONFIG_MEMORY_HOTREMOVE=y
CONFIG_QDIO=y
CONFIG_CHSC_SCH=m
CONFIG_IPL=y
CONFIG_BINFMT_MISC=m
CONFIG_PFAULT=y
CONFIG_HZ_100=y
CONFIG_KEXEC=y
CONFIG_S390_GUEST=y
CONFIG_PM=y
CONFIG_HIBERNATION=y
CONFIG_PACKET=y
@ -46,16 +30,15 @@ CONFIG_NET_KEY=y
CONFIG_AFIUCV=m
CONFIG_INET=y
CONFIG_IP_MULTICAST=y
# CONFIG_INET_LRO is not set
CONFIG_IPV6=y
CONFIG_NETFILTER=y
CONFIG_NETFILTER_NETLINK_QUEUE=m
CONFIG_NETFILTER_NETLINK_LOG=m
CONFIG_NF_CONNTRACK=m
# CONFIG_NF_CT_PROTO_SCTP is not set
CONFIG_NET_SCTPPROBE=m
CONFIG_L2TP=m
CONFIG_L2TP_DEBUGFS=m
CONFIG_VLAN_8021Q=y
CONFIG_NET_SCHED=y
CONFIG_NET_SCH_CBQ=m
CONFIG_NET_SCH_PRIO=m
CONFIG_NET_SCH_MULTIQ=y
CONFIG_NET_SCH_RED=m
CONFIG_NET_SCH_SFQ=m
CONFIG_NET_SCH_TEQL=m
@ -69,28 +52,14 @@ CONFIG_NET_CLS_U32=m
CONFIG_CLS_U32_MARK=y
CONFIG_NET_CLS_RSVP=m
CONFIG_NET_CLS_RSVP6=m
CONFIG_NET_CLS_FLOW=m
CONFIG_NET_CLS_ACT=y
CONFIG_NET_ACT_POLICE=y
CONFIG_NET_ACT_NAT=m
CONFIG_CAN=m
CONFIG_CAN_RAW=m
CONFIG_CAN_BCM=m
CONFIG_CAN_VCAN=m
CONFIG_UEVENT_HELPER_PATH="/sbin/hotplug"
# CONFIG_FIRMWARE_IN_KERNEL is not set
CONFIG_BLK_DEV_LOOP=m
CONFIG_BLK_DEV_NBD=m
CONFIG_BLK_DEV_RAM=y
CONFIG_BLK_DEV_XIP=y
CONFIG_BLK_DEV_XPRAM=m
CONFIG_DASD=y
CONFIG_DASD_PROFILE=y
CONFIG_DASD_ECKD=y
CONFIG_DASD_FBA=y
CONFIG_DASD_DIAG=y
CONFIG_DASD_EER=y
CONFIG_VIRTIO_BLK=m
CONFIG_VIRTIO_BLK=y
CONFIG_SCSI=y
CONFIG_BLK_DEV_SD=y
CONFIG_CHR_DEV_ST=y
@ -102,101 +71,92 @@ CONFIG_SCSI_CONSTANTS=y
CONFIG_SCSI_LOGGING=y
CONFIG_SCSI_SCAN_ASYNC=y
CONFIG_ZFCP=y
CONFIG_SCSI_DH=m
CONFIG_SCSI_DH_RDAC=m
CONFIG_SCSI_DH_HP_SW=m
CONFIG_SCSI_DH_EMC=m
CONFIG_SCSI_DH_ALUA=m
CONFIG_SCSI_OSD_INITIATOR=m
CONFIG_SCSI_OSD_ULD=m
CONFIG_MD=y
CONFIG_BLK_DEV_MD=y
CONFIG_MD_LINEAR=m
CONFIG_MD_RAID0=m
CONFIG_MD_RAID1=m
CONFIG_MD_MULTIPATH=m
CONFIG_BLK_DEV_DM=y
CONFIG_DM_CRYPT=y
CONFIG_DM_SNAPSHOT=y
CONFIG_DM_MIRROR=y
CONFIG_DM_ZERO=y
CONFIG_DM_MULTIPATH=m
CONFIG_ZFCP_DIF=y
CONFIG_NETDEVICES=y
CONFIG_DUMMY=m
CONFIG_BONDING=m
CONFIG_EQUALIZER=m
CONFIG_TUN=m
CONFIG_VETH=m
CONFIG_NET_ETHERNET=y
CONFIG_LCS=m
CONFIG_CTCM=m
CONFIG_QETH=y
CONFIG_QETH_L2=y
CONFIG_QETH_L3=y
CONFIG_VIRTIO_NET=m
CONFIG_HW_RANDOM_VIRTIO=m
CONFIG_VIRTIO_NET=y
CONFIG_RAW_DRIVER=m
CONFIG_TN3270=y
CONFIG_TN3270_TTY=y
CONFIG_TN3270_FS=m
CONFIG_TN3270_CONSOLE=y
CONFIG_TN3215=y
CONFIG_TN3215_CONSOLE=y
CONFIG_SCLP_TTY=y
CONFIG_SCLP_CONSOLE=y
CONFIG_SCLP_VT220_TTY=y
CONFIG_SCLP_VT220_CONSOLE=y
CONFIG_SCLP_CPI=m
CONFIG_SCLP_ASYNC=m
CONFIG_S390_TAPE=m
CONFIG_S390_TAPE_BLOCK=y
CONFIG_S390_TAPE_34XX=m
CONFIG_ACCESSIBILITY=y
CONFIG_EXT2_FS=y
CONFIG_EXT3_FS=y
# CONFIG_EXT3_DEFAULTS_TO_ORDERED is not set
CONFIG_EXT4_FS=y
CONFIG_EXT4_FS_POSIX_ACL=y
CONFIG_EXT4_FS_SECURITY=y
CONFIG_PROC_KCORE=y
CONFIG_TMPFS=y
CONFIG_TMPFS_POSIX_ACL=y
CONFIG_NFS_FS=y
CONFIG_NFS_V3=y
CONFIG_NFSD=y
CONFIG_NFSD_V3=y
# CONFIG_NETWORK_FILESYSTEMS is not set
CONFIG_PARTITION_ADVANCED=y
CONFIG_IBM_PARTITION=y
CONFIG_DLM=m
CONFIG_MAGIC_SYSRQ=y
CONFIG_DEBUG_KERNEL=y
# CONFIG_SCHED_DEBUG is not set
CONFIG_DEBUG_SPINLOCK=y
CONFIG_DEBUG_MUTEXES=y
CONFIG_TIMER_STATS=y
CONFIG_PROVE_LOCKING=y
CONFIG_PROVE_RCU=y
CONFIG_LOCK_STAT=y
CONFIG_DEBUG_LOCKDEP=y
CONFIG_DEBUG_SPINLOCK_SLEEP=y
CONFIG_DEBUG_LIST=y
CONFIG_DEBUG_NOTIFIERS=y
# CONFIG_RCU_CPU_STALL_DETECTOR is not set
CONFIG_DEBUG_FORCE_WEAK_PER_CPU=y
CONFIG_KPROBES_SANITY_TEST=y
CONFIG_CPU_NOTIFIER_ERROR_INJECT=m
CONFIG_LATENCYTOP=y
CONFIG_SYSCTL_SYSCALL_CHECK=y
CONFIG_SAMPLES=y
CONFIG_CRYPTO_FIPS=y
CONFIG_DEBUG_PAGEALLOC=y
# CONFIG_FTRACE is not set
# CONFIG_STRICT_DEVMEM is not set
CONFIG_CRYPTO_NULL=m
CONFIG_CRYPTO_CRYPTD=m
CONFIG_CRYPTO_AUTHENC=m
CONFIG_CRYPTO_TEST=m
CONFIG_CRYPTO_CCM=m
CONFIG_CRYPTO_GCM=m
CONFIG_CRYPTO_CBC=y
CONFIG_CRYPTO_CTS=m
CONFIG_CRYPTO_ECB=m
CONFIG_CRYPTO_LRW=m
CONFIG_CRYPTO_PCBC=m
CONFIG_CRYPTO_XTS=m
CONFIG_CRYPTO_XCBC=m
CONFIG_CRYPTO_VMAC=m
CONFIG_CRYPTO_MD4=m
CONFIG_CRYPTO_MICHAEL_MIC=m
CONFIG_CRYPTO_RMD128=m
CONFIG_CRYPTO_RMD160=m
CONFIG_CRYPTO_RMD256=m
CONFIG_CRYPTO_RMD320=m
CONFIG_CRYPTO_SHA256=m
CONFIG_CRYPTO_SHA512=m
CONFIG_CRYPTO_TGR192=m
CONFIG_CRYPTO_WP512=m
CONFIG_CRYPTO_ANUBIS=m
CONFIG_CRYPTO_ARC4=m
CONFIG_CRYPTO_BLOWFISH=m
CONFIG_CRYPTO_CAMELLIA=m
CONFIG_CRYPTO_CAST5=m
CONFIG_CRYPTO_CAST6=m
CONFIG_CRYPTO_DES=m
CONFIG_CRYPTO_FCRYPT=m
CONFIG_CRYPTO_KHAZAD=m
CONFIG_CRYPTO_SALSA20=m
CONFIG_CRYPTO_SEED=m
CONFIG_CRYPTO_SERPENT=m
CONFIG_CRYPTO_TEA=m
CONFIG_CRYPTO_TWOFISH=m
CONFIG_CRYPTO_DEFLATE=m
CONFIG_CRYPTO_ZLIB=m
CONFIG_CRYPTO_LZO=m
CONFIG_ZCRYPT=m
CONFIG_CRYPTO_SHA1_S390=m
CONFIG_CRYPTO_SHA256_S390=m
CONFIG_CRYPTO_SHA512_S390=m
CONFIG_CRC_T10DIF=y
CONFIG_CRC32=m
CONFIG_CRYPTO_DES_S390=m
CONFIG_CRYPTO_AES_S390=m
CONFIG_CRC7=m
CONFIG_KVM=m
CONFIG_VIRTIO_BALLOON=m
CONFIG_VIRTIO_BALLOON=y

2
arch/s390/hypfs/Makefile
View file

@ -4,4 +4,4 @@
obj-$(CONFIG_S390_HYPFS_FS) += s390_hypfs.o
s390_hypfs-objs := inode.o hypfs_diag.o hypfs_vm.o
s390_hypfs-objs := inode.o hypfs_diag.o hypfs_vm.o hypfs_dbfs.o

33
arch/s390/hypfs/hypfs.h
View file

@ -12,6 +12,8 @@
#include <linux/fs.h>
#include <linux/types.h>
#include <linux/debugfs.h>
#include <linux/workqueue.h>
#include <linux/kref.h>
#define REG_FILE_MODE 0440
#define UPDATE_FILE_MODE 0220
@ -38,6 +40,33 @@ extern int hypfs_vm_init(void);
extern void hypfs_vm_exit(void);
extern int hypfs_vm_create_files(struct super_block *sb, struct dentry *root);
/* Directory for debugfs files */
extern struct dentry *hypfs_dbfs_dir;
/* debugfs interface */
struct hypfs_dbfs_file;
struct hypfs_dbfs_data {
void *buf;
void *buf_free_ptr;
size_t size;
struct hypfs_dbfs_file *dbfs_file;;
struct kref kref;
};
struct hypfs_dbfs_file {
const char *name;
int (*data_create)(void **data, void **data_free_ptr,
size_t *size);
void (*data_free)(const void *buf_free_ptr);
/* Private data for hypfs_dbfs.c */
struct hypfs_dbfs_data *data;
struct delayed_work data_free_work;
struct mutex lock;
struct dentry *dentry;
};
extern int hypfs_dbfs_init(void);
extern void hypfs_dbfs_exit(void);
extern int hypfs_dbfs_create_file(struct hypfs_dbfs_file *df);
extern void hypfs_dbfs_remove_file(struct hypfs_dbfs_file *df);
#endif /* _HYPFS_H_ */

116
arch/s390/hypfs/hypfs_dbfs.c Normal file
View file

@ -0,0 +1,116 @@
/*
* Hypervisor filesystem for Linux on s390 - debugfs interface
*
* Copyright (C) IBM Corp. 2010
* Author(s): Michael Holzheu <holzheu@linux.vnet.ibm.com>
*/
#include <linux/slab.h>
#include "hypfs.h"
static struct dentry *dbfs_dir;
static struct hypfs_dbfs_data *hypfs_dbfs_data_alloc(struct hypfs_dbfs_file *f)
{
struct hypfs_dbfs_data *data;
data = kmalloc(sizeof(*data), GFP_KERNEL);
if (!data)
return NULL;
kref_init(&data->kref);
data->dbfs_file = f;
return data;
}
static void hypfs_dbfs_data_free(struct kref *kref)
{
struct hypfs_dbfs_data *data;
data = container_of(kref, struct hypfs_dbfs_data, kref);
data->dbfs_file->data_free(data->buf_free_ptr);
kfree(data);
}
static void data_free_delayed(struct work_struct *work)
{
struct hypfs_dbfs_data *data;
struct hypfs_dbfs_file *df;
df = container_of(work, struct hypfs_dbfs_file, data_free_work.work);
mutex_lock(&df->lock);
data = df->data;
df->data = NULL;
mutex_unlock(&df->lock);
kref_put(&data->kref, hypfs_dbfs_data_free);
}
static ssize_t dbfs_read(struct file *file, char __user *buf,
size_t size, loff_t *ppos)
{
struct hypfs_dbfs_data *data;
struct hypfs_dbfs_file *df;
ssize_t rc;
if (*ppos != 0)
return 0;
df = file->f_path.dentry->d_inode->i_private;
mutex_lock(&df->lock);
if (!df->data) {
data = hypfs_dbfs_data_alloc(df);
if (!data) {
mutex_unlock(&df->lock);
return -ENOMEM;
}
rc = df->data_create(&data->buf, &data->buf_free_ptr,
&data->size);
if (rc) {
mutex_unlock(&df->lock);
kfree(data);
return rc;
}
df->data = data;
schedule_delayed_work(&df->data_free_work, HZ);
}
data = df->data;
kref_get(&data->kref);
mutex_unlock(&df->lock);
rc = simple_read_from_buffer(buf, size, ppos, data->buf, data->size);
kref_put(&data->kref, hypfs_dbfs_data_free);
return rc;
}
static const struct file_operations dbfs_ops = {
.read = dbfs_read,
.llseek = no_llseek,
};
int hypfs_dbfs_create_file(struct hypfs_dbfs_file *df)
{
df->dentry = debugfs_create_file(df->name, 0400, dbfs_dir, df,
&dbfs_ops);
if (IS_ERR(df->dentry))
return PTR_ERR(df->dentry);
mutex_init(&df->lock);
INIT_DELAYED_WORK(&df->data_free_work, data_free_delayed);
return 0;
}
void hypfs_dbfs_remove_file(struct hypfs_dbfs_file *df)
{
debugfs_remove(df->dentry);
}
int hypfs_dbfs_init(void)
{
dbfs_dir = debugfs_create_dir("s390_hypfs", NULL);
if (IS_ERR(dbfs_dir))
return PTR_ERR(dbfs_dir);
return 0;
}
void hypfs_dbfs_exit(void)
{
debugfs_remove(dbfs_dir);
}

82
arch/s390/hypfs/hypfs_diag.c
View file

@ -555,81 +555,38 @@ struct dbfs_d204 {
char buf[]; /* d204 buffer */
} __attribute__ ((packed));
struct dbfs_d204_private {
struct dbfs_d204 *d204; /* Aligned d204 data with header */
void *base; /* Base pointer (needed for vfree) */
};
static int dbfs_d204_open(struct inode *inode, struct file *file)
static int dbfs_d204_create(void **data, void **data_free_ptr, size_t *size)
{
struct dbfs_d204_private *data;
struct dbfs_d204 *d204;
int rc, buf_size;
void *base;
data = kzalloc(sizeof(*data), GFP_KERNEL);
if (!data)
return -ENOMEM;
buf_size = PAGE_SIZE * (diag204_buf_pages + 1) + sizeof(d204->hdr);
data->base = vmalloc(buf_size);
if (!data->base) {
rc = -ENOMEM;
goto fail_kfree_data;
base = vmalloc(buf_size);
if (!base)
return -ENOMEM;
memset(base, 0, buf_size);
d204 = page_align_ptr(base + sizeof(d204->hdr)) - sizeof(d204->hdr);
rc = diag204_do_store(d204->buf, diag204_buf_pages);
if (rc) {
vfree(base);
return rc;
}
memset(data->base, 0, buf_size);
d204 = page_align_ptr(data->base + sizeof(d204->hdr))
- sizeof(d204->hdr);
rc = diag204_do_store(&d204->buf, diag204_buf_pages);
if (rc)
goto fail_vfree_base;
d204->hdr.version = DBFS_D204_HDR_VERSION;
d204->hdr.len = PAGE_SIZE * diag204_buf_pages;
d204->hdr.sc = diag204_store_sc;
data->d204 = d204;
file->private_data = data;
return nonseekable_open(inode, file);
fail_vfree_base:
vfree(data->base);
fail_kfree_data:
kfree(data);
return rc;
}
static int dbfs_d204_release(struct inode *inode, struct file *file)
{
struct dbfs_d204_private *data = file->private_data;
vfree(data->base);
kfree(data);
*data = d204;
*data_free_ptr = base;
*size = d204->hdr.len + sizeof(struct dbfs_d204_hdr);
return 0;
}
static ssize_t dbfs_d204_read(struct file *file, char __user *buf,
size_t size, loff_t *ppos)
{
struct dbfs_d204_private *data = file->private_data;
return simple_read_from_buffer(buf, size, ppos, data->d204,
data->d204->hdr.len +
sizeof(data->d204->hdr));
}
static const struct file_operations dbfs_d204_ops = {
.open = dbfs_d204_open,
.read = dbfs_d204_read,
.release = dbfs_d204_release,
.llseek = no_llseek,
static struct hypfs_dbfs_file dbfs_file_d204 = {
.name = "diag_204",
.data_create = dbfs_d204_create,
.data_free = vfree,
};
static int hypfs_dbfs_init(void)
{
dbfs_d204_file = debugfs_create_file("diag_204", 0400, hypfs_dbfs_dir,
NULL, &dbfs_d204_ops);
if (IS_ERR(dbfs_d204_file))
return PTR_ERR(dbfs_d204_file);
return 0;
}
__init int hypfs_diag_init(void)
{
int rc;
@ -639,7 +596,7 @@ __init int hypfs_diag_init(void)
return -ENODATA;
}
if (diag204_info_type == INFO_EXT) {
rc = hypfs_dbfs_init();
rc = hypfs_dbfs_create_file(&dbfs_file_d204);
if (rc)
return rc;
}
@ -660,6 +617,7 @@ void hypfs_diag_exit(void)
debugfs_remove(dbfs_d204_file);
diag224_delete_name_table();
diag204_free_buffer();
hypfs_dbfs_remove_file(&dbfs_file_d204);
}
/*

62
arch/s390/hypfs/hypfs_vm.c
View file

@ -20,8 +20,6 @@ static char local_guest[] = " ";
static char all_guests[] = "* ";
static char *guest_query;
static struct dentry *dbfs_d2fc_file;
struct diag2fc_data {
__u32 version;
__u32 flags;
@ -104,7 +102,7 @@ static void *diag2fc_store(char *query, unsigned int *count, int offset)
return data;
}
static void diag2fc_free(void *data)
static void diag2fc_free(const void *data)
{
vfree(data);
}
@ -239,43 +237,29 @@ struct dbfs_d2fc {
char buf[]; /* d2fc buffer */
} __attribute__ ((packed));
static int dbfs_d2fc_open(struct inode *inode, struct file *file)
static int dbfs_diag2fc_create(void **data, void **data_free_ptr, size_t *size)
{
struct dbfs_d2fc *data;
struct dbfs_d2fc *d2fc;
unsigned int count;
data = diag2fc_store(guest_query, &count, sizeof(data->hdr));
if (IS_ERR(data))
return PTR_ERR(data);
get_clock_ext(data->hdr.tod_ext);
data->hdr.len = count * sizeof(struct diag2fc_data);
data->hdr.version = DBFS_D2FC_HDR_VERSION;
data->hdr.count = count;
memset(&data->hdr.reserved, 0, sizeof(data->hdr.reserved));
file->private_data = data;
return nonseekable_open(inode, file);
}
static int dbfs_d2fc_release(struct inode *inode, struct file *file)
{
diag2fc_free(file->private_data);
d2fc = diag2fc_store(guest_query, &count, sizeof(d2fc->hdr));
if (IS_ERR(d2fc))
return PTR_ERR(d2fc);
get_clock_ext(d2fc->hdr.tod_ext);
d2fc->hdr.len = count * sizeof(struct diag2fc_data);
d2fc->hdr.version = DBFS_D2FC_HDR_VERSION;
d2fc->hdr.count = count;
memset(&d2fc->hdr.reserved, 0, sizeof(d2fc->hdr.reserved));
*data = d2fc;
*data_free_ptr = d2fc;
*size = d2fc->hdr.len + sizeof(struct dbfs_d2fc_hdr);
return 0;
}
static ssize_t dbfs_d2fc_read(struct file *file, char __user *buf,
size_t size, loff_t *ppos)
{
struct dbfs_d2fc *data = file->private_data;
return simple_read_from_buffer(buf, size, ppos, data, data->hdr.len +
sizeof(struct dbfs_d2fc_hdr));
}
static const struct file_operations dbfs_d2fc_ops = {
.open = dbfs_d2fc_open,
.read = dbfs_d2fc_read,
.release = dbfs_d2fc_release,
.llseek = no_llseek,
static struct hypfs_dbfs_file dbfs_file_2fc = {
.name = "diag_2fc",
.data_create = dbfs_diag2fc_create,
.data_free = diag2fc_free,
};
int hypfs_vm_init(void)
@ -288,18 +272,12 @@ int hypfs_vm_init(void)
guest_query = local_guest;
else
return -EACCES;
dbfs_d2fc_file = debugfs_create_file("diag_2fc", 0400, hypfs_dbfs_dir,
NULL, &dbfs_d2fc_ops);
if (IS_ERR(dbfs_d2fc_file))
return PTR_ERR(dbfs_d2fc_file);
return 0;
return hypfs_dbfs_create_file(&dbfs_file_2fc);
}
void hypfs_vm_exit(void)
{
if (!MACHINE_IS_VM)
return;
debugfs_remove(dbfs_d2fc_file);
hypfs_dbfs_remove_file(&dbfs_file_2fc);
}

18
arch/s390/hypfs/inode.c
View file

@ -46,8 +46,6 @@ static const struct super_operations hypfs_s_ops;
/* start of list of all dentries, which have to be deleted on update */
static struct dentry *hypfs_last_dentry;
struct dentry *hypfs_dbfs_dir;
static void hypfs_update_update(struct super_block *sb)
{
struct hypfs_sb_info *sb_info = sb->s_fs_info;
@ -471,13 +469,12 @@ static int __init hypfs_init(void)
{
int rc;
hypfs_dbfs_dir = debugfs_create_dir("s390_hypfs", NULL);
if (IS_ERR(hypfs_dbfs_dir))
return PTR_ERR(hypfs_dbfs_dir);
rc = hypfs_dbfs_init();
if (rc)
return rc;
if (hypfs_diag_init()) {
rc = -ENODATA;
goto fail_debugfs_remove;
goto fail_dbfs_exit;
}
if (hypfs_vm_init()) {
rc = -ENODATA;
@ -499,9 +496,8 @@ static int __init hypfs_init(void)
hypfs_vm_exit();
fail_hypfs_diag_exit:
hypfs_diag_exit();
fail_debugfs_remove:
debugfs_remove(hypfs_dbfs_dir);
fail_dbfs_exit:
hypfs_dbfs_exit();
pr_err("Initialization of hypfs failed with rc=%i\n", rc);
return rc;
}
@ -510,7 +506,7 @@ static void __exit hypfs_exit(void)
{
hypfs_diag_exit();
hypfs_vm_exit();
debugfs_remove(hypfs_dbfs_dir);
hypfs_dbfs_exit();
unregister_filesystem(&hypfs_type);
kobject_put(s390_kobj);
}

2
arch/s390/include/asm/ccwdev.h
View file

@ -204,6 +204,8 @@ int ccw_device_tm_start_timeout(struct ccw_device *, struct tcw *,
unsigned long, u8, int);
int ccw_device_tm_intrg(struct ccw_device *cdev);
int ccw_device_get_mdc(struct ccw_device *cdev, u8 mask);
extern int ccw_device_set_online(struct ccw_device *cdev);
extern int ccw_device_set_offline(struct ccw_device *cdev);

2
arch/s390/include/asm/cputime.h
View file

@ -202,7 +202,7 @@ static inline void s390_idle_check(struct pt_regs *regs, __u64 int_clock,
static inline int s390_nohz_delay(int cpu)
{
return per_cpu(s390_idle, cpu).nohz_delay != 0;
return __get_cpu_var(s390_idle).nohz_delay != 0;
}
#define arch_needs_cpu(cpu) s390_nohz_delay(cpu)

3
arch/s390/include/asm/dasd.h
View file

@ -73,6 +73,7 @@ typedef struct dasd_information2_t {
* 0x02: use diag discipline (diag)
* 0x04: set the device initially online (internal use only)
* 0x08: enable ERP related logging
* 0x20: give access to raw eckd data
*/
#define DASD_FEATURE_DEFAULT 0x00
#define DASD_FEATURE_READONLY 0x01
@ -80,6 +81,8 @@ typedef struct dasd_information2_t {
#define DASD_FEATURE_INITIAL_ONLINE 0x04
#define DASD_FEATURE_ERPLOG 0x08
#define DASD_FEATURE_FAILFAST 0x10
#define DASD_FEATURE_FAILONSLCK 0x20
#define DASD_FEATURE_USERAW 0x40
#define DASD_PARTN_BITS 2

11
arch/s390/include/asm/ftrace.h
View file

@ -4,20 +4,17 @@
#ifndef __ASSEMBLY__
extern void _mcount(void);
extern unsigned long ftrace_dyn_func;
struct dyn_arch_ftrace { };
#define MCOUNT_ADDR ((long)_mcount)
#ifdef CONFIG_64BIT
#define MCOUNT_OFFSET_RET 18
#define MCOUNT_INSN_SIZE 24
#define MCOUNT_OFFSET 14
#else
#define MCOUNT_OFFSET_RET 26
#define MCOUNT_INSN_SIZE 30
#define MCOUNT_INSN_SIZE 12
#define MCOUNT_OFFSET 8
#else
#define MCOUNT_INSN_SIZE 20
#define MCOUNT_OFFSET 4
#endif
static inline unsigned long ftrace_call_adjust(unsigned long addr)

16
arch/s390/include/asm/hardirq.h
View file

@ -21,20 +21,4 @@
#define HARDIRQ_BITS 8
void clock_comparator_work(void);
static inline unsigned long long local_tick_disable(void)
{
unsigned long long old;
old = S390_lowcore.clock_comparator;
S390_lowcore.clock_comparator = -1ULL;
return old;
}
static inline void local_tick_enable(unsigned long long comp)
{
S390_lowcore.clock_comparator = comp;
}
#endif /* __ASM_HARDIRQ_H */

34
arch/s390/include/asm/irq.h
View file

@ -1,23 +1,33 @@
#ifndef _ASM_IRQ_H
#define _ASM_IRQ_H
#ifdef __KERNEL__
#include <linux/hardirq.h>
/*
* the definition of irqs has changed in 2.5.46:
* NR_IRQS is no longer the number of i/o
* interrupts (65536), but rather the number
* of interrupt classes (2).
* Only external and i/o interrupts make much sense here (CH).
*/
enum interruption_class {
EXTERNAL_INTERRUPT,
IO_INTERRUPT,
EXTINT_CLK,
EXTINT_IPI,
EXTINT_TMR,
EXTINT_TLA,
EXTINT_PFL,
EXTINT_DSD,
EXTINT_VRT,
EXTINT_SCP,
EXTINT_IUC,
IOINT_QAI,
IOINT_QDI,
IOINT_DAS,
IOINT_C15,
IOINT_C70,
IOINT_TAP,
IOINT_VMR,
IOINT_LCS,
IOINT_CLW,
IOINT_CTC,
IOINT_APB,
NMI_NMI,
NR_IRQS,
};
#endif /* __KERNEL__ */
#endif
#endif /* _ASM_IRQ_H */

20
arch/s390/include/asm/kprobes.h
View file

@ -31,7 +31,6 @@
#include <linux/ptrace.h>
#include <linux/percpu.h>
#define __ARCH_WANT_KPROBES_INSN_SLOT
struct pt_regs;
struct kprobe;
@ -58,23 +57,12 @@ typedef u16 kprobe_opcode_t;
/* Architecture specific copy of original instruction */
struct arch_specific_insn {
/* copy of original instruction */
kprobe_opcode_t *insn;
int fixup;
int ilen;
int reg;
kprobe_opcode_t insn[MAX_INSN_SIZE];
};
struct ins_replace_args {
kprobe_opcode_t *ptr;
kprobe_opcode_t old;
kprobe_opcode_t new;
};
struct prev_kprobe {
struct kprobe *kp;
unsigned long status;
unsigned long saved_psw;
unsigned long kprobe_saved_imask;
unsigned long kprobe_saved_ctl[3];
};
/* per-cpu kprobe control block */
@ -82,17 +70,13 @@ struct kprobe_ctlblk {
unsigned long kprobe_status;
unsigned long kprobe_saved_imask;
unsigned long kprobe_saved_ctl[3];
struct pt_regs jprobe_saved_regs;
unsigned long jprobe_saved_r14;
unsigned long jprobe_saved_r15;
struct prev_kprobe prev_kprobe;
struct pt_regs jprobe_saved_regs;
kprobe_opcode_t jprobes_stack[MAX_STACK_SIZE];
};
void arch_remove_kprobe(struct kprobe *p);
void kretprobe_trampoline(void);
int is_prohibited_opcode(kprobe_opcode_t *instruction);
void get_instruction_type(struct arch_specific_insn *ainsn);
int kprobe_fault_handler(struct pt_regs *regs, int trapnr);
int kprobe_exceptions_notify(struct notifier_block *self,

4
arch/s390/include/asm/processor.h
View file

@ -32,7 +32,6 @@ static inline void get_cpu_id(struct cpuid *ptr)
}
extern void s390_adjust_jiffies(void);
extern void print_cpu_info(void);
extern int get_cpu_capability(unsigned int *);
/*
@ -81,7 +80,8 @@ struct thread_struct {
mm_segment_t mm_segment;
unsigned long prot_addr; /* address of protection-excep. */
unsigned int trap_no;
per_struct per_info;
struct per_regs per_user; /* User specified PER registers */
struct per_event per_event; /* Cause of the last PER trap */
/* pfault_wait is used to block the process on a pfault event */
unsigned long pfault_wait;
};

52
arch/s390/include/asm/ptrace.h
View file

@ -331,10 +331,60 @@ struct pt_regs
unsigned short ilc;
unsigned short svcnr;
};
/*
* Program event recording (PER) register set.
*/
struct per_regs {
unsigned long control; /* PER control bits */
unsigned long start; /* PER starting address */
unsigned long end; /* PER ending address */
};
/*
* PER event contains information about the cause of the last PER exception.
*/
struct per_event {
unsigned short cause; /* PER code, ATMID and AI */
unsigned long address; /* PER address */
unsigned char paid; /* PER access identification */
};
/*
* Simplified per_info structure used to decode the ptrace user space ABI.
*/
struct per_struct_kernel {
unsigned long cr9; /* PER control bits */
unsigned long cr10; /* PER starting address */
unsigned long cr11; /* PER ending address */
unsigned long bits; /* Obsolete software bits */
unsigned long starting_addr; /* User specified start address */
unsigned long ending_addr; /* User specified end address */
unsigned short perc_atmid; /* PER trap ATMID */
unsigned long address; /* PER trap instruction address */
unsigned char access_id; /* PER trap access identification */
};
#define PER_EVENT_MASK 0xE9000000UL
#define PER_EVENT_BRANCH 0x80000000UL
#define PER_EVENT_IFETCH 0x40000000UL
#define PER_EVENT_STORE 0x20000000UL
#define PER_EVENT_STORE_REAL 0x08000000UL
#define PER_EVENT_NULLIFICATION 0x01000000UL
#define PER_CONTROL_MASK 0x00a00000UL
#define PER_CONTROL_BRANCH_ADDRESS 0x00800000UL
#define PER_CONTROL_ALTERATION 0x00200000UL
#endif
/*
* Now for the program event recording (trace) definitions.
* Now for the user space program event recording (trace) definitions.
* The following structures are used only for the ptrace interface, don't
* touch or even look at it if you don't want to modify the user-space
* ptrace interface. In particular stay away from it for in-kernel PER.
*/
typedef struct
{

1
arch/s390/include/asm/qdio.h
View file

@ -361,6 +361,7 @@ struct qdio_initialize {
qdio_handler_t *input_handler;
qdio_handler_t *output_handler;
void (*queue_start_poll) (struct ccw_device *, int, unsigned long);
int scan_threshold;
unsigned long int_parm;
void **input_sbal_addr_array;
void **output_sbal_addr_array;

29
arch/s390/include/asm/s390_ext.h
View file

@ -1,32 +1,17 @@
/*
* Copyright IBM Corp. 1999,2010
* Author(s): Holger Smolinski <Holger.Smolinski@de.ibm.com>,
* Martin Schwidefsky <schwidefsky@de.ibm.com>,
*/
#ifndef _S390_EXTINT_H
#define _S390_EXTINT_H
/*
* include/asm-s390/s390_ext.h
*
* S390 version
* Copyright IBM Corp. 1999,2007
* Author(s): Holger Smolinski (Holger.Smolinski@de.ibm.com),
* Martin Schwidefsky (schwidefsky@de.ibm.com)
*/
#include <linux/types.h>
typedef void (*ext_int_handler_t)(unsigned int, unsigned int, unsigned long);
typedef struct ext_int_info_t {
struct ext_int_info_t *next;
ext_int_handler_t handler;
__u16 code;
} ext_int_info_t;
extern ext_int_info_t *ext_int_hash[];
int register_external_interrupt(__u16 code, ext_int_handler_t handler);
int register_early_external_interrupt(__u16 code, ext_int_handler_t handler,
ext_int_info_t *info);
int unregister_external_interrupt(__u16 code, ext_int_handler_t handler);
int unregister_early_external_interrupt(__u16 code, ext_int_handler_t handler,
ext_int_info_t *info);
#endif
#endif /* _S390_EXTINT_H */

3
arch/s390/include/asm/smp.h
View file

@ -20,7 +20,6 @@ extern void machine_power_off_smp(void);
extern int __cpu_disable (void);
extern void __cpu_die (unsigned int cpu);
extern void cpu_die (void) __attribute__ ((noreturn));
extern int __cpu_up (unsigned int cpu);
extern struct mutex smp_cpu_state_mutex;
@ -71,8 +70,10 @@ static inline void smp_switch_to_ipl_cpu(void (*func)(void *), void *data)
#ifdef CONFIG_HOTPLUG_CPU
extern int smp_rescan_cpus(void);
extern void __noreturn cpu_die(void);
#else
static inline int smp_rescan_cpus(void) { return 0; }
static inline void cpu_die(void) { }
#endif
#endif /* __ASM_SMP_H */

4
arch/s390/include/asm/system.h
View file

@ -20,6 +20,7 @@
struct task_struct;
extern struct task_struct *__switch_to(void *, void *);
extern void update_per_regs(struct task_struct *task);
static inline void save_fp_regs(s390_fp_regs *fpregs)
{
@ -93,6 +94,7 @@ static inline void restore_access_regs(unsigned int *acrs)
if (next->mm) { \
restore_fp_regs(&next->thread.fp_regs); \
restore_access_regs(&next->thread.acrs[0]); \
update_per_regs(next); \
} \
prev = __switch_to(prev,next); \
} while (0)
@ -101,11 +103,9 @@ extern void account_vtime(struct task_struct *, struct task_struct *);
extern void account_tick_vtime(struct task_struct *);
#ifdef CONFIG_PFAULT
extern void pfault_irq_init(void);
extern int pfault_init(void);
extern void pfault_fini(void);
#else /* CONFIG_PFAULT */
#define pfault_irq_init() do { } while (0)
#define pfault_init() ({-1;})
#define pfault_fini() do { } while (0)
#endif /* CONFIG_PFAULT */

10
arch/s390/include/asm/thread_info.h
View file

@ -74,7 +74,7 @@ struct thread_info {
/* how to get the thread information struct from C */
static inline struct thread_info *current_thread_info(void)
{
return (struct thread_info *)(S390_lowcore.kernel_stack - THREAD_SIZE);
return (struct thread_info *) S390_lowcore.thread_info;
}
#define THREAD_SIZE_ORDER THREAD_ORDER
@ -88,7 +88,7 @@ static inline struct thread_info *current_thread_info(void)
#define TIF_SIGPENDING 2 /* signal pending */
#define TIF_NEED_RESCHED 3 /* rescheduling necessary */
#define TIF_RESTART_SVC 4 /* restart svc with new svc number */
#define TIF_SINGLE_STEP 6 /* deliver sigtrap on return to user */
#define TIF_PER_TRAP 6 /* deliver sigtrap on return to user */
#define TIF_MCCK_PENDING 7 /* machine check handling is pending */
#define TIF_SYSCALL_TRACE 8 /* syscall trace active */
#define TIF_SYSCALL_AUDIT 9 /* syscall auditing active */
@ -99,14 +99,15 @@ static inline struct thread_info *current_thread_info(void)
#define TIF_31BIT 17 /* 32bit process */
#define TIF_MEMDIE 18 /* is terminating due to OOM killer */
#define TIF_RESTORE_SIGMASK 19 /* restore signal mask in do_signal() */
#define TIF_FREEZE 20 /* thread is freezing for suspend */
#define TIF_SINGLE_STEP 20 /* This task is single stepped */
#define TIF_FREEZE 21 /* thread is freezing for suspend */
#define _TIF_NOTIFY_RESUME (1<<TIF_NOTIFY_RESUME)
#define _TIF_RESTORE_SIGMASK (1<<TIF_RESTORE_SIGMASK)
#define _TIF_SIGPENDING (1<<TIF_SIGPENDING)
#define _TIF_NEED_RESCHED (1<<TIF_NEED_RESCHED)
#define _TIF_RESTART_SVC (1<<TIF_RESTART_SVC)
#define _TIF_SINGLE_STEP (1<<TIF_SINGLE_STEP)
#define _TIF_PER_TRAP (1<<TIF_PER_TRAP)
#define _TIF_MCCK_PENDING (1<<TIF_MCCK_PENDING)
#define _TIF_SYSCALL_TRACE (1<<TIF_SYSCALL_TRACE)
#define _TIF_SYSCALL_AUDIT (1<<TIF_SYSCALL_AUDIT)
@ -114,6 +115,7 @@ static inline struct thread_info *current_thread_info(void)
#define _TIF_SYSCALL_TRACEPOINT (1<<TIF_SYSCALL_TRACEPOINT)
#define _TIF_POLLING_NRFLAG (1<<TIF_POLLING_NRFLAG)
#define _TIF_31BIT (1<<TIF_31BIT)
#define _TIF_SINGLE_STEP (1<<TIF_FREEZE)
#define _TIF_FREEZE (1<<TIF_FREEZE)
#endif /* __KERNEL__ */

20
arch/s390/include/asm/timex.h
View file

@ -11,6 +11,8 @@
#ifndef _ASM_S390_TIMEX_H
#define _ASM_S390_TIMEX_H
#include <asm/lowcore.h>
/* The value of the TOD clock for 1.1.1970. */
#define TOD_UNIX_EPOCH 0x7d91048bca000000ULL
@ -49,6 +51,24 @@ static inline void store_clock_comparator(__u64 *time)
asm volatile("stckc %0" : "=Q" (*time));
}
void clock_comparator_work(void);
static inline unsigned long long local_tick_disable(void)
{
unsigned long long old;
old = S390_lowcore.clock_comparator;
S390_lowcore.clock_comparator = -1ULL;
set_clock_comparator(S390_lowcore.clock_comparator);
return old;
}
static inline void local_tick_enable(unsigned long long comp)
{
S390_lowcore.clock_comparator = comp;
set_clock_comparator(S390_lowcore.clock_comparator);
}
#define CLOCK_TICK_RATE 1193180 /* Underlying HZ */
typedef unsigned long long cycles_t;

14
arch/s390/kernel/asm-offsets.c
View file

@ -23,14 +23,16 @@ int main(void)
{
DEFINE(__THREAD_info, offsetof(struct task_struct, stack));
DEFINE(__THREAD_ksp, offsetof(struct task_struct, thread.ksp));
DEFINE(__THREAD_per, offsetof(struct task_struct, thread.per_info));
DEFINE(__THREAD_mm_segment, offsetof(struct task_struct, thread.mm_segment));
BLANK();
DEFINE(__TASK_pid, offsetof(struct task_struct, pid));
BLANK();
DEFINE(__PER_atmid, offsetof(per_struct, lowcore.words.perc_atmid));
DEFINE(__PER_address, offsetof(per_struct, lowcore.words.address));
DEFINE(__PER_access_id, offsetof(per_struct, lowcore.words.access_id));
DEFINE(__THREAD_per_cause,
offsetof(struct task_struct, thread.per_event.cause));
DEFINE(__THREAD_per_address,
offsetof(struct task_struct, thread.per_event.address));
DEFINE(__THREAD_per_paid,
offsetof(struct task_struct, thread.per_event.paid));
BLANK();
DEFINE(__TI_task, offsetof(struct thread_info, task));
DEFINE(__TI_domain, offsetof(struct thread_info, exec_domain));
@ -85,9 +87,9 @@ int main(void)
DEFINE(__LC_PGM_ILC, offsetof(struct _lowcore, pgm_ilc));
DEFINE(__LC_PGM_INT_CODE, offsetof(struct _lowcore, pgm_code));
DEFINE(__LC_TRANS_EXC_CODE, offsetof(struct _lowcore, trans_exc_code));
DEFINE(__LC_PER_ATMID, offsetof(struct _lowcore, per_perc_atmid));
DEFINE(__LC_PER_CAUSE, offsetof(struct _lowcore, per_perc_atmid));
DEFINE(__LC_PER_ADDRESS, offsetof(struct _lowcore, per_address));
DEFINE(__LC_PER_ACCESS_ID, offsetof(struct _lowcore, per_access_id));
DEFINE(__LC_PER_PAID, offsetof(struct _lowcore, per_access_id));
DEFINE(__LC_AR_MODE_ID, offsetof(struct _lowcore, ar_access_id));
DEFINE(__LC_SUBCHANNEL_ID, offsetof(struct _lowcore, subchannel_id));
DEFINE(__LC_SUBCHANNEL_NR, offsetof(struct _lowcore, subchannel_nr));

53
arch/s390/kernel/compat_ptrace.h
View file

@ -4,40 +4,19 @@
#include <asm/ptrace.h> /* needed for NUM_CR_WORDS */
#include "compat_linux.h" /* needed for psw_compat_t */
typedef struct {
__u32 cr[NUM_CR_WORDS];
} per_cr_words32;
struct compat_per_struct_kernel {
__u32 cr9; /* PER control bits */
__u32 cr10; /* PER starting address */
__u32 cr11; /* PER ending address */
__u32 bits; /* Obsolete software bits */
__u32 starting_addr; /* User specified start address */
__u32 ending_addr; /* User specified end address */
__u16 perc_atmid; /* PER trap ATMID */
__u32 address; /* PER trap instruction address */
__u8 access_id; /* PER trap access identification */
};
typedef struct {
__u16 perc_atmid; /* 0x096 */
__u32 address; /* 0x098 */
__u8 access_id; /* 0x0a1 */
} per_lowcore_words32;
typedef struct {
union {
per_cr_words32 words;
} control_regs;
/*
* Use these flags instead of setting em_instruction_fetch
* directly they are used so that single stepping can be
* switched on & off while not affecting other tracing
*/
unsigned single_step : 1;
unsigned instruction_fetch : 1;
unsigned : 30;
/*
* These addresses are copied into cr10 & cr11 if single
* stepping is switched off
*/
__u32 starting_addr;
__u32 ending_addr;
union {
per_lowcore_words32 words;
} lowcore;
} per_struct32;
struct user_regs_struct32
struct compat_user_regs_struct
{
psw_compat_t psw;
u32 gprs[NUM_GPRS];
@ -50,14 +29,14 @@ struct user_regs_struct32
* itself as there is no "official" ptrace interface for hardware
* watchpoints. This is the way intel does it.
*/
per_struct32 per_info;
struct compat_per_struct_kernel per_info;
u32 ieee_instruction_pointer; /* obsolete, always 0 */
};
struct user32 {
struct compat_user {
/* We start with the registers, to mimic the way that "memory"
is returned from the ptrace(3,...) function. */
struct user_regs_struct32 regs; /* Where the registers are actually stored */
struct compat_user_regs_struct regs;
/* The rest of this junk is to help gdb figure out what goes where */
u32 u_tsize; /* Text segment size (pages). */
u32 u_dsize; /* Data segment size (pages). */
@ -79,6 +58,6 @@ typedef struct
__u32 len;
__u32 kernel_addr;
__u32 process_addr;
} ptrace_area_emu31;
} compat_ptrace_area;
#endif /* _PTRACE32_H */

276
arch/s390/kernel/entry.S
View file

@ -9,7 +9,6 @@
* Heiko Carstens <heiko.carstens@de.ibm.com>
*/
#include <linux/sys.h>
#include <linux/linkage.h>
#include <linux/init.h>
#include <asm/cache.h>
@ -49,7 +48,7 @@ SP_SVCNR = STACK_FRAME_OVERHEAD + __PT_SVCNR
SP_SIZE = STACK_FRAME_OVERHEAD + __PT_SIZE
_TIF_WORK_SVC = (_TIF_SIGPENDING | _TIF_NOTIFY_RESUME | _TIF_NEED_RESCHED | \
_TIF_MCCK_PENDING | _TIF_RESTART_SVC | _TIF_SINGLE_STEP )
_TIF_MCCK_PENDING | _TIF_RESTART_SVC | _TIF_PER_TRAP )
_TIF_WORK_INT = (_TIF_SIGPENDING | _TIF_NOTIFY_RESUME | _TIF_NEED_RESCHED | \
_TIF_MCCK_PENDING)
_TIF_SYSCALL = (_TIF_SYSCALL_TRACE>>8 | _TIF_SYSCALL_AUDIT>>8 | \
@ -110,31 +109,36 @@ STACK_SIZE = 1 << STACK_SHIFT
1: stm %r10,%r11,\lc_sum
.endm
.macro SAVE_ALL_SVC psworg,savearea
stm %r12,%r15,\savearea
l %r13,__LC_SVC_NEW_PSW+4 # load &system_call to %r13
l %r15,__LC_KERNEL_STACK # problem state -> load ksp
s %r15,BASED(.Lc_spsize) # make room for registers & psw
.endm
.macro SAVE_ALL_BASE savearea
stm %r12,%r15,\savearea
l %r13,__LC_SVC_NEW_PSW+4 # load &system_call to %r13
.endm
.macro SAVE_ALL_SVC psworg,savearea
la %r12,\psworg
l %r15,__LC_KERNEL_STACK # problem state -> load ksp
.endm
.macro SAVE_ALL_SYNC psworg,savearea
la %r12,\psworg
.macro SAVE_ALL_PGM psworg,savearea
tm \psworg+1,0x01 # test problem state bit
bz BASED(2f) # skip stack setup save
l %r15,__LC_KERNEL_STACK # problem state -> load ksp
#ifdef CONFIG_CHECK_STACK
b BASED(3f)
2: tml %r15,STACK_SIZE - CONFIG_STACK_GUARD
bz BASED(stack_overflow)
3:
bnz BASED(1f)
tml %r15,STACK_SIZE - CONFIG_STACK_GUARD
bnz BASED(2f)
la %r12,\psworg
b BASED(stack_overflow)
#else
bz BASED(2f)
#endif
2:
1: l %r15,__LC_KERNEL_STACK # problem state -> load ksp
2: s %r15,BASED(.Lc_spsize) # make room for registers & psw
.endm
.macro SAVE_ALL_ASYNC psworg,savearea
stm %r12,%r15,\savearea
l %r13,__LC_SVC_NEW_PSW+4 # load &system_call to %r13
la %r12,\psworg
tm \psworg+1,0x01 # test problem state bit
bnz BASED(1f) # from user -> load async stack
@ -149,27 +153,23 @@ STACK_SIZE = 1 << STACK_SHIFT
0: l %r14,__LC_ASYNC_STACK # are we already on the async stack ?
slr %r14,%r15
sra %r14,STACK_SHIFT
be BASED(2f)
1: l %r15,__LC_ASYNC_STACK
#ifdef CONFIG_CHECK_STACK
b BASED(3f)
2: tml %r15,STACK_SIZE - CONFIG_STACK_GUARD
bz BASED(stack_overflow)
3:
bnz BASED(1f)
tml %r15,STACK_SIZE - CONFIG_STACK_GUARD
bnz BASED(2f)
b BASED(stack_overflow)
#else
bz BASED(2f)
#endif
2:
1: l %r15,__LC_ASYNC_STACK
2: s %r15,BASED(.Lc_spsize) # make room for registers & psw
.endm
.macro CREATE_STACK_FRAME psworg,savearea
s %r15,BASED(.Lc_spsize) # make room for registers & psw
mvc SP_PSW(8,%r15),0(%r12) # move user PSW to stack
.macro CREATE_STACK_FRAME savearea
xc __SF_BACKCHAIN(4,%r15),__SF_BACKCHAIN(%r15)
st %r2,SP_ORIG_R2(%r15) # store original content of gpr 2
icm %r12,12,__LC_SVC_ILC
stm %r0,%r11,SP_R0(%r15) # store gprs %r0-%r11 to kernel stack
st %r12,SP_ILC(%r15)
mvc SP_R12(16,%r15),\savearea # move %r12-%r15 to stack
la %r12,0
st %r12,__SF_BACKCHAIN(%r15) # clear back chain
stm %r0,%r11,SP_R0(%r15) # store gprs %r0-%r11 to kernel stack
.endm
.macro RESTORE_ALL psworg,sync
@ -188,6 +188,8 @@ STACK_SIZE = 1 << STACK_SHIFT
ssm __SF_EMPTY(%r15)
.endm
.section .kprobes.text, "ax"
/*
* Scheduler resume function, called by switch_to
* gpr2 = (task_struct *) prev
@ -198,31 +200,21 @@ STACK_SIZE = 1 << STACK_SHIFT
.globl __switch_to
__switch_to:
basr %r1,0
__switch_to_base:
tm __THREAD_per(%r3),0xe8 # new process is using per ?
bz __switch_to_noper-__switch_to_base(%r1) # if not we're fine
stctl %c9,%c11,__SF_EMPTY(%r15) # We are using per stuff
clc __THREAD_per(12,%r3),__SF_EMPTY(%r15)
be __switch_to_noper-__switch_to_base(%r1) # we got away w/o bashing TLB's
lctl %c9,%c11,__THREAD_per(%r3) # Nope we didn't
__switch_to_noper:
l %r4,__THREAD_info(%r2) # get thread_info of prev
0: l %r4,__THREAD_info(%r2) # get thread_info of prev
l %r5,__THREAD_info(%r3) # get thread_info of next
tm __TI_flags+3(%r4),_TIF_MCCK_PENDING # machine check pending?
bz __switch_to_no_mcck-__switch_to_base(%r1)
ni __TI_flags+3(%r4),255-_TIF_MCCK_PENDING # clear flag in prev
l %r4,__THREAD_info(%r3) # get thread_info of next
oi __TI_flags+3(%r4),_TIF_MCCK_PENDING # set it in next
__switch_to_no_mcck:
stm %r6,%r15,__SF_GPRS(%r15)# store __switch_to registers of prev task
st %r15,__THREAD_ksp(%r2) # store kernel stack to prev->tss.ksp
l %r15,__THREAD_ksp(%r3) # load kernel stack from next->tss.ksp
lm %r6,%r15,__SF_GPRS(%r15)# load __switch_to registers of next task
st %r3,__LC_CURRENT # __LC_CURRENT = current task struct
lctl %c4,%c4,__TASK_pid(%r3) # load pid to control reg. 4
l %r3,__THREAD_info(%r3) # load thread_info from task struct
st %r3,__LC_THREAD_INFO
ahi %r3,STACK_SIZE
st %r3,__LC_KERNEL_STACK # __LC_KERNEL_STACK = new kernel stack
bz 1f-0b(%r1)
ni __TI_flags+3(%r4),255-_TIF_MCCK_PENDING # clear flag in prev
oi __TI_flags+3(%r5),_TIF_MCCK_PENDING # set it in next
1: stm %r6,%r15,__SF_GPRS(%r15) # store gprs of prev task
st %r15,__THREAD_ksp(%r2) # store kernel stack of prev
l %r15,__THREAD_ksp(%r3) # load kernel stack of next
lctl %c4,%c4,__TASK_pid(%r3) # load pid to control reg. 4
lm %r6,%r15,__SF_GPRS(%r15) # load gprs of next task
st %r3,__LC_CURRENT # store task struct of next
st %r5,__LC_THREAD_INFO # store thread info of next
ahi %r5,STACK_SIZE # end of kernel stack of next
st %r5,__LC_KERNEL_STACK # store end of kernel stack
br %r14
__critical_start:
@ -235,10 +227,11 @@ __critical_start:
system_call:
stpt __LC_SYNC_ENTER_TIMER
sysc_saveall:
SAVE_ALL_BASE __LC_SAVE_AREA
SAVE_ALL_SVC __LC_SVC_OLD_PSW,__LC_SAVE_AREA
CREATE_STACK_FRAME __LC_SVC_OLD_PSW,__LC_SAVE_AREA
lh %r7,0x8a # get svc number from lowcore
CREATE_STACK_FRAME __LC_SAVE_AREA
mvc SP_PSW(8,%r15),__LC_SVC_OLD_PSW
mvc SP_ILC(4,%r15),__LC_SVC_ILC
l %r12,__LC_THREAD_INFO # load pointer to thread_info struct
sysc_vtime:
UPDATE_VTIME __LC_EXIT_TIMER,__LC_SYNC_ENTER_TIMER,__LC_USER_TIMER
sysc_stime:
@ -246,20 +239,20 @@ sysc_stime:
sysc_update:
mvc __LC_LAST_UPDATE_TIMER(8),__LC_SYNC_ENTER_TIMER
sysc_do_svc:
l %r9,__LC_THREAD_INFO # load pointer to thread_info struct
ltr %r7,%r7 # test for svc 0
xr %r7,%r7
icm %r7,3,SP_SVCNR(%r15) # load svc number and test for svc 0
bnz BASED(sysc_nr_ok) # svc number > 0
# svc 0: system call number in %r1
cl %r1,BASED(.Lnr_syscalls)
bnl BASED(sysc_nr_ok)
sth %r1,SP_SVCNR(%r15)
lr %r7,%r1 # copy svc number to %r7
sysc_nr_ok:
sth %r7,SP_SVCNR(%r15)
sll %r7,2 # svc number *4
l %r8,BASED(.Lsysc_table)
tm __TI_flags+2(%r9),_TIF_SYSCALL
l %r10,BASED(.Lsysc_table)
tm __TI_flags+2(%r12),_TIF_SYSCALL
mvc SP_ARGS(4,%r15),SP_R7(%r15)
l %r8,0(%r7,%r8) # get system call addr.
l %r8,0(%r7,%r10) # get system call addr.
bnz BASED(sysc_tracesys)
basr %r14,%r8 # call sys_xxxx
st %r2,SP_R2(%r15) # store return value (change R2 on stack)
@ -267,7 +260,7 @@ sysc_nr_ok:
sysc_return:
LOCKDEP_SYS_EXIT
sysc_tif:
tm __TI_flags+3(%r9),_TIF_WORK_SVC
tm __TI_flags+3(%r12),_TIF_WORK_SVC
bnz BASED(sysc_work) # there is work to do (signals etc.)
sysc_restore:
RESTORE_ALL __LC_RETURN_PSW,1
@ -284,17 +277,17 @@ sysc_work:
# One of the work bits is on. Find out which one.
#
sysc_work_tif:
tm __TI_flags+3(%r9),_TIF_MCCK_PENDING
tm __TI_flags+3(%r12),_TIF_MCCK_PENDING
bo BASED(sysc_mcck_pending)
tm __TI_flags+3(%r9),_TIF_NEED_RESCHED
tm __TI_flags+3(%r12),_TIF_NEED_RESCHED
bo BASED(sysc_reschedule)
tm __TI_flags+3(%r9),_TIF_SIGPENDING
tm __TI_flags+3(%r12),_TIF_SIGPENDING
bo BASED(sysc_sigpending)
tm __TI_flags+3(%r9),_TIF_NOTIFY_RESUME
tm __TI_flags+3(%r12),_TIF_NOTIFY_RESUME
bo BASED(sysc_notify_resume)
tm __TI_flags+3(%r9),_TIF_RESTART_SVC
tm __TI_flags+3(%r12),_TIF_RESTART_SVC
bo BASED(sysc_restart)
tm __TI_flags+3(%r9),_TIF_SINGLE_STEP
tm __TI_flags+3(%r12),_TIF_PER_TRAP
bo BASED(sysc_singlestep)
b BASED(sysc_return) # beware of critical section cleanup
@ -318,13 +311,13 @@ sysc_mcck_pending:
# _TIF_SIGPENDING is set, call do_signal
#
sysc_sigpending:
ni __TI_flags+3(%r9),255-_TIF_SINGLE_STEP # clear TIF_SINGLE_STEP
ni __TI_flags+3(%r12),255-_TIF_PER_TRAP # clear TIF_PER_TRAP
la %r2,SP_PTREGS(%r15) # load pt_regs
l %r1,BASED(.Ldo_signal)
basr %r14,%r1 # call do_signal
tm __TI_flags+3(%r9),_TIF_RESTART_SVC
tm __TI_flags+3(%r12),_TIF_RESTART_SVC
bo BASED(sysc_restart)
tm __TI_flags+3(%r9),_TIF_SINGLE_STEP
tm __TI_flags+3(%r12),_TIF_PER_TRAP
bo BASED(sysc_singlestep)
b BASED(sysc_return)
@ -342,23 +335,23 @@ sysc_notify_resume:
# _TIF_RESTART_SVC is set, set up registers and restart svc
#
sysc_restart:
ni __TI_flags+3(%r9),255-_TIF_RESTART_SVC # clear TIF_RESTART_SVC
ni __TI_flags+3(%r12),255-_TIF_RESTART_SVC # clear TIF_RESTART_SVC
l %r7,SP_R2(%r15) # load new svc number
mvc SP_R2(4,%r15),SP_ORIG_R2(%r15) # restore first argument
lm %r2,%r6,SP_R2(%r15) # load svc arguments
sth %r7,SP_SVCNR(%r15)
b BASED(sysc_nr_ok) # restart svc
#
# _TIF_SINGLE_STEP is set, call do_single_step
# _TIF_PER_TRAP is set, call do_per_trap
#
sysc_singlestep:
ni __TI_flags+3(%r9),255-_TIF_SINGLE_STEP # clear TIF_SINGLE_STEP
mvi SP_SVCNR(%r15),0xff # set trap indication to pgm check
mvi SP_SVCNR+1(%r15),0xff
ni __TI_flags+3(%r12),255-_TIF_PER_TRAP # clear TIF_PER_TRAP
xc SP_SVCNR(2,%r15),SP_SVCNR(%r15) # clear svc number
la %r2,SP_PTREGS(%r15) # address of register-save area
l %r1,BASED(.Lhandle_per) # load adr. of per handler
la %r14,BASED(sysc_return) # load adr. of system return
br %r1 # branch to do_single_step
br %r1 # branch to do_per_trap
#
# call tracehook_report_syscall_entry/tracehook_report_syscall_exit before
@ -368,15 +361,15 @@ sysc_tracesys:
l %r1,BASED(.Ltrace_entry)
la %r2,SP_PTREGS(%r15) # load pt_regs
la %r3,0
srl %r7,2
st %r7,SP_R2(%r15)
xr %r0,%r0
icm %r0,3,SP_SVCNR(%r15)
st %r0,SP_R2(%r15)
basr %r14,%r1
cl %r2,BASED(.Lnr_syscalls)
bnl BASED(sysc_tracenogo)
l %r8,BASED(.Lsysc_table)
lr %r7,%r2
sll %r7,2 # svc number *4
l %r8,0(%r7,%r8)
l %r8,0(%r7,%r10)
sysc_tracego:
lm %r3,%r6,SP_R3(%r15)
mvc SP_ARGS(4,%r15),SP_R7(%r15)
@ -384,7 +377,7 @@ sysc_tracego:
basr %r14,%r8 # call sys_xxx
st %r2,SP_R2(%r15) # store return value
sysc_tracenogo:
tm __TI_flags+2(%r9),_TIF_SYSCALL
tm __TI_flags+2(%r12),_TIF_SYSCALL
bz BASED(sysc_return)
l %r1,BASED(.Ltrace_exit)
la %r2,SP_PTREGS(%r15) # load pt_regs
@ -397,7 +390,7 @@ sysc_tracenogo:
.globl ret_from_fork
ret_from_fork:
l %r13,__LC_SVC_NEW_PSW+4
l %r9,__LC_THREAD_INFO # load pointer to thread_info struct
l %r12,__LC_THREAD_INFO # load pointer to thread_info struct
tm SP_PSW+1(%r15),0x01 # forking a kernel thread ?
bo BASED(0f)
st %r15,SP_R15(%r15) # store stack pointer for new kthread
@ -432,8 +425,8 @@ kernel_execve:
0: stnsm __SF_EMPTY(%r15),0xfc # disable interrupts
l %r15,__LC_KERNEL_STACK # load ksp
s %r15,BASED(.Lc_spsize) # make room for registers & psw
l %r9,__LC_THREAD_INFO
mvc SP_PTREGS(__PT_SIZE,%r15),0(%r12) # copy pt_regs
l %r12,__LC_THREAD_INFO
xc __SF_BACKCHAIN(4,%r15),__SF_BACKCHAIN(%r15)
stosm __SF_EMPTY(%r15),0x03 # reenable interrupts
l %r1,BASED(.Lexecve_tail)
@ -463,26 +456,27 @@ pgm_check_handler:
SAVE_ALL_BASE __LC_SAVE_AREA
tm __LC_PGM_INT_CODE+1,0x80 # check whether we got a per exception
bnz BASED(pgm_per) # got per exception -> special case
SAVE_ALL_SYNC __LC_PGM_OLD_PSW,__LC_SAVE_AREA
CREATE_STACK_FRAME __LC_PGM_OLD_PSW,__LC_SAVE_AREA
SAVE_ALL_PGM __LC_PGM_OLD_PSW,__LC_SAVE_AREA
CREATE_STACK_FRAME __LC_SAVE_AREA
xc SP_ILC(4,%r15),SP_ILC(%r15)
mvc SP_PSW(8,%r15),__LC_PGM_OLD_PSW
l %r12,__LC_THREAD_INFO # load pointer to thread_info struct
tm SP_PSW+1(%r15),0x01 # interrupting from user ?
bz BASED(pgm_no_vtime)
UPDATE_VTIME __LC_EXIT_TIMER,__LC_SYNC_ENTER_TIMER,__LC_USER_TIMER
UPDATE_VTIME __LC_LAST_UPDATE_TIMER,__LC_EXIT_TIMER,__LC_SYSTEM_TIMER
mvc __LC_LAST_UPDATE_TIMER(8),__LC_SYNC_ENTER_TIMER
pgm_no_vtime:
l %r9,__LC_THREAD_INFO # load pointer to thread_info struct
l %r3,__LC_PGM_ILC # load program interruption code
l %r4,__LC_TRANS_EXC_CODE
REENABLE_IRQS
la %r8,0x7f
nr %r8,%r3
pgm_do_call:
l %r7,BASED(.Ljump_table)
sll %r8,2
l %r7,0(%r8,%r7) # load address of handler routine
l %r1,BASED(.Ljump_table)
l %r1,0(%r8,%r1) # load address of handler routine
la %r2,SP_PTREGS(%r15) # address of register-save area
basr %r14,%r7 # branch to interrupt-handler
basr %r14,%r1 # branch to interrupt-handler
pgm_exit:
b BASED(sysc_return)
@ -503,33 +497,34 @@ pgm_per:
# Normal per exception
#
pgm_per_std:
SAVE_ALL_SYNC __LC_PGM_OLD_PSW,__LC_SAVE_AREA
CREATE_STACK_FRAME __LC_PGM_OLD_PSW,__LC_SAVE_AREA
SAVE_ALL_PGM __LC_PGM_OLD_PSW,__LC_SAVE_AREA
CREATE_STACK_FRAME __LC_SAVE_AREA
mvc SP_PSW(8,%r15),__LC_PGM_OLD_PSW
l %r12,__LC_THREAD_INFO # load pointer to thread_info struct
tm SP_PSW+1(%r15),0x01 # interrupting from user ?
bz BASED(pgm_no_vtime2)
UPDATE_VTIME __LC_EXIT_TIMER,__LC_SYNC_ENTER_TIMER,__LC_USER_TIMER
UPDATE_VTIME __LC_LAST_UPDATE_TIMER,__LC_EXIT_TIMER,__LC_SYSTEM_TIMER
mvc __LC_LAST_UPDATE_TIMER(8),__LC_SYNC_ENTER_TIMER
pgm_no_vtime2:
l %r9,__LC_THREAD_INFO # load pointer to thread_info struct
l %r1,__TI_task(%r9)
l %r1,__TI_task(%r12)
tm SP_PSW+1(%r15),0x01 # kernel per event ?
bz BASED(kernel_per)
mvc __THREAD_per+__PER_atmid(2,%r1),__LC_PER_ATMID
mvc __THREAD_per+__PER_address(4,%r1),__LC_PER_ADDRESS
mvc __THREAD_per+__PER_access_id(1,%r1),__LC_PER_ACCESS_ID
oi __TI_flags+3(%r9),_TIF_SINGLE_STEP # set TIF_SINGLE_STEP
mvc __THREAD_per_cause(2,%r1),__LC_PER_CAUSE
mvc __THREAD_per_address(4,%r1),__LC_PER_ADDRESS
mvc __THREAD_per_paid(1,%r1),__LC_PER_PAID
oi __TI_flags+3(%r12),_TIF_PER_TRAP # set TIF_PER_TRAP
l %r3,__LC_PGM_ILC # load program interruption code
l %r4,__LC_TRANS_EXC_CODE
REENABLE_IRQS
la %r8,0x7f
nr %r8,%r3 # clear per-event-bit and ilc
be BASED(pgm_exit2) # only per or per+check ?
l %r7,BASED(.Ljump_table)
sll %r8,2
l %r7,0(%r8,%r7) # load address of handler routine
l %r1,BASED(.Ljump_table)
l %r1,0(%r8,%r1) # load address of handler routine
la %r2,SP_PTREGS(%r15) # address of register-save area
basr %r14,%r7 # branch to interrupt-handler
basr %r14,%r1 # branch to interrupt-handler
pgm_exit2:
b BASED(sysc_return)
@ -537,18 +532,19 @@ pgm_exit2:
# it was a single stepped SVC that is causing all the trouble
#
pgm_svcper:
SAVE_ALL_SYNC __LC_SVC_OLD_PSW,__LC_SAVE_AREA
CREATE_STACK_FRAME __LC_SVC_OLD_PSW,__LC_SAVE_AREA
SAVE_ALL_PGM __LC_SVC_OLD_PSW,__LC_SAVE_AREA
CREATE_STACK_FRAME __LC_SAVE_AREA
mvc SP_PSW(8,%r15),__LC_SVC_OLD_PSW
mvc SP_ILC(4,%r15),__LC_SVC_ILC
l %r12,__LC_THREAD_INFO # load pointer to thread_info struct
UPDATE_VTIME __LC_EXIT_TIMER,__LC_SYNC_ENTER_TIMER,__LC_USER_TIMER
UPDATE_VTIME __LC_LAST_UPDATE_TIMER,__LC_EXIT_TIMER,__LC_SYSTEM_TIMER
mvc __LC_LAST_UPDATE_TIMER(8),__LC_SYNC_ENTER_TIMER
lh %r7,0x8a # get svc number from lowcore
l %r9,__LC_THREAD_INFO # load pointer to thread_info struct
l %r8,__TI_task(%r9)
mvc __THREAD_per+__PER_atmid(2,%r8),__LC_PER_ATMID
mvc __THREAD_per+__PER_address(4,%r8),__LC_PER_ADDRESS
mvc __THREAD_per+__PER_access_id(1,%r8),__LC_PER_ACCESS_ID
oi __TI_flags+3(%r9),_TIF_SINGLE_STEP # set TIF_SINGLE_STEP
l %r8,__TI_task(%r12)
mvc __THREAD_per_cause(2,%r8),__LC_PER_CAUSE
mvc __THREAD_per_address(4,%r8),__LC_PER_ADDRESS
mvc __THREAD_per_paid(1,%r8),__LC_PER_PAID
oi __TI_flags+3(%r12),_TIF_PER_TRAP # set TIF_PER_TRAP
stosm __SF_EMPTY(%r15),0x03 # reenable interrupts
lm %r2,%r6,SP_R2(%r15) # load svc arguments
b BASED(sysc_do_svc)
@ -558,8 +554,7 @@ pgm_svcper:
#
kernel_per:
REENABLE_IRQS
mvi SP_SVCNR(%r15),0xff # set trap indication to pgm check
mvi SP_SVCNR+1(%r15),0xff
xc SP_SVCNR(2,%r15),SP_SVCNR(%r15)
la %r2,SP_PTREGS(%r15) # address of register-save area
l %r1,BASED(.Lhandle_per) # load adr. of per handler
basr %r14,%r1 # branch to do_single_step
@ -573,9 +568,10 @@ kernel_per:
io_int_handler:
stck __LC_INT_CLOCK
stpt __LC_ASYNC_ENTER_TIMER
SAVE_ALL_BASE __LC_SAVE_AREA+16
SAVE_ALL_ASYNC __LC_IO_OLD_PSW,__LC_SAVE_AREA+16
CREATE_STACK_FRAME __LC_IO_OLD_PSW,__LC_SAVE_AREA+16
CREATE_STACK_FRAME __LC_SAVE_AREA+16
mvc SP_PSW(8,%r15),0(%r12) # move user PSW to stack
l %r12,__LC_THREAD_INFO # load pointer to thread_info struct
tm SP_PSW+1(%r15),0x01 # interrupting from user ?
bz BASED(io_no_vtime)
UPDATE_VTIME __LC_EXIT_TIMER,__LC_ASYNC_ENTER_TIMER,__LC_USER_TIMER
@ -583,7 +579,6 @@ io_int_handler:
mvc __LC_LAST_UPDATE_TIMER(8),__LC_ASYNC_ENTER_TIMER
io_no_vtime:
TRACE_IRQS_OFF
l %r9,__LC_THREAD_INFO # load pointer to thread_info struct
l %r1,BASED(.Ldo_IRQ) # load address of do_IRQ
la %r2,SP_PTREGS(%r15) # address of register-save area
basr %r14,%r1 # branch to standard irq handler
@ -591,7 +586,7 @@ io_return:
LOCKDEP_SYS_EXIT
TRACE_IRQS_ON
io_tif:
tm __TI_flags+3(%r9),_TIF_WORK_INT
tm __TI_flags+3(%r12),_TIF_WORK_INT
bnz BASED(io_work) # there is work to do (signals etc.)
io_restore:
RESTORE_ALL __LC_RETURN_PSW,0
@ -609,9 +604,9 @@ io_work:
bo BASED(io_work_user) # yes -> do resched & signal
#ifdef CONFIG_PREEMPT
# check for preemptive scheduling
icm %r0,15,__TI_precount(%r9)
icm %r0,15,__TI_precount(%r12)
bnz BASED(io_restore) # preemption disabled
tm __TI_flags+3(%r9),_TIF_NEED_RESCHED
tm __TI_flags+3(%r12),_TIF_NEED_RESCHED
bno BASED(io_restore)
# switch to kernel stack
l %r1,SP_R15(%r15)
@ -645,13 +640,13 @@ io_work_user:
# and _TIF_MCCK_PENDING
#
io_work_tif:
tm __TI_flags+3(%r9),_TIF_MCCK_PENDING
tm __TI_flags+3(%r12),_TIF_MCCK_PENDING
bo BASED(io_mcck_pending)
tm __TI_flags+3(%r9),_TIF_NEED_RESCHED
tm __TI_flags+3(%r12),_TIF_NEED_RESCHED
bo BASED(io_reschedule)
tm __TI_flags+3(%r9),_TIF_SIGPENDING
tm __TI_flags+3(%r12),_TIF_SIGPENDING
bo BASED(io_sigpending)
tm __TI_flags+3(%r9),_TIF_NOTIFY_RESUME
tm __TI_flags+3(%r12),_TIF_NOTIFY_RESUME
bo BASED(io_notify_resume)
b BASED(io_return) # beware of critical section cleanup
@ -711,16 +706,16 @@ io_notify_resume:
ext_int_handler:
stck __LC_INT_CLOCK
stpt __LC_ASYNC_ENTER_TIMER
SAVE_ALL_BASE __LC_SAVE_AREA+16
SAVE_ALL_ASYNC __LC_EXT_OLD_PSW,__LC_SAVE_AREA+16
CREATE_STACK_FRAME __LC_EXT_OLD_PSW,__LC_SAVE_AREA+16
CREATE_STACK_FRAME __LC_SAVE_AREA+16
mvc SP_PSW(8,%r15),0(%r12) # move user PSW to stack
l %r12,__LC_THREAD_INFO # load pointer to thread_info struct
tm SP_PSW+1(%r15),0x01 # interrupting from user ?
bz BASED(ext_no_vtime)
UPDATE_VTIME __LC_EXIT_TIMER,__LC_ASYNC_ENTER_TIMER,__LC_USER_TIMER
UPDATE_VTIME __LC_LAST_UPDATE_TIMER,__LC_EXIT_TIMER,__LC_SYSTEM_TIMER
mvc __LC_LAST_UPDATE_TIMER(8),__LC_ASYNC_ENTER_TIMER
ext_no_vtime:
l %r9,__LC_THREAD_INFO # load pointer to thread_info struct
TRACE_IRQS_OFF
la %r2,SP_PTREGS(%r15) # address of register-save area
l %r3,__LC_CPU_ADDRESS # get cpu address + interruption code
@ -775,7 +770,10 @@ mcck_int_main:
sra %r14,PAGE_SHIFT
be BASED(0f)
l %r15,__LC_PANIC_STACK # load panic stack
0: CREATE_STACK_FRAME __LC_MCK_OLD_PSW,__LC_SAVE_AREA+32
0: s %r15,BASED(.Lc_spsize) # make room for registers & psw
CREATE_STACK_FRAME __LC_SAVE_AREA+32
mvc SP_PSW(8,%r15),0(%r12)
l %r12,__LC_THREAD_INFO # load pointer to thread_info struct
tm __LC_MCCK_CODE+2,0x08 # mwp of old psw valid?
bno BASED(mcck_no_vtime) # no -> skip cleanup critical
tm SP_PSW+1(%r15),0x01 # interrupting from user ?
@ -784,7 +782,6 @@ mcck_int_main:
UPDATE_VTIME __LC_LAST_UPDATE_TIMER,__LC_EXIT_TIMER,__LC_SYSTEM_TIMER
mvc __LC_LAST_UPDATE_TIMER(8),__LC_MCCK_ENTER_TIMER
mcck_no_vtime:
l %r9,__LC_THREAD_INFO # load pointer to thread_info struct
la %r2,SP_PTREGS(%r15) # load pt_regs
l %r1,BASED(.Ls390_mcck)
basr %r14,%r1 # call machine check handler
@ -796,7 +793,7 @@ mcck_no_vtime:
xc __SF_BACKCHAIN(4,%r1),__SF_BACKCHAIN(%r1) # clear back chain
lr %r15,%r1
stosm __SF_EMPTY(%r15),0x04 # turn dat on
tm __TI_flags+3(%r9),_TIF_MCCK_PENDING
tm __TI_flags+3(%r12),_TIF_MCCK_PENDING
bno BASED(mcck_return)
TRACE_IRQS_OFF
l %r1,BASED(.Ls390_handle_mcck)
@ -861,6 +858,8 @@ restart_crash:
restart_go:
#endif
.section .kprobes.text, "ax"
#ifdef CONFIG_CHECK_STACK
/*
* The synchronous or the asynchronous stack overflowed. We are dead.
@ -943,12 +942,13 @@ cleanup_system_call:
bh BASED(0f)
mvc __LC_SAVE_AREA(16),0(%r12)
0: st %r13,4(%r12)
st %r12,__LC_SAVE_AREA+48 # argh
SAVE_ALL_SYNC __LC_SVC_OLD_PSW,__LC_SAVE_AREA
CREATE_STACK_FRAME __LC_SVC_OLD_PSW,__LC_SAVE_AREA
l %r12,__LC_SAVE_AREA+48 # argh
l %r15,__LC_KERNEL_STACK # problem state -> load ksp
s %r15,BASED(.Lc_spsize) # make room for registers & psw
st %r15,12(%r12)
lh %r7,0x8a
CREATE_STACK_FRAME __LC_SAVE_AREA
mvc SP_PSW(8,%r15),__LC_SVC_OLD_PSW
mvc SP_ILC(4,%r15),__LC_SVC_ILC
mvc 0(4,%r12),__LC_THREAD_INFO
cleanup_vtime:
clc __LC_RETURN_PSW+4(4),BASED(cleanup_system_call_insn+12)
bhe BASED(cleanup_stime)
@ -1046,7 +1046,7 @@ cleanup_io_restore_insn:
.Ldo_signal: .long do_signal
.Ldo_notify_resume:
.long do_notify_resume
.Lhandle_per: .long do_single_step
.Lhandle_per: .long do_per_trap
.Ldo_execve: .long do_execve
.Lexecve_tail: .long execve_tail
.Ljump_table: .long pgm_check_table

2
arch/s390/kernel/entry.h
View file

@ -12,7 +12,7 @@ pgm_check_handler_t do_dat_exception;
extern int sysctl_userprocess_debug;
void do_single_step(struct pt_regs *regs);
void do_per_trap(struct pt_regs *regs);
void syscall_trace(struct pt_regs *regs, int entryexit);
void kernel_stack_overflow(struct pt_regs * regs);
void do_signal(struct pt_regs *regs);

73
arch/s390/kernel/entry64.S
View file

@ -51,7 +51,7 @@ STACK_SHIFT = PAGE_SHIFT + THREAD_ORDER
STACK_SIZE = 1 << STACK_SHIFT
_TIF_WORK_SVC = (_TIF_SIGPENDING | _TIF_NOTIFY_RESUME | _TIF_NEED_RESCHED | \
_TIF_MCCK_PENDING | _TIF_RESTART_SVC | _TIF_SINGLE_STEP )
_TIF_MCCK_PENDING | _TIF_RESTART_SVC | _TIF_PER_TRAP )
_TIF_WORK_INT = (_TIF_SIGPENDING | _TIF_NOTIFY_RESUME | _TIF_NEED_RESCHED | \
_TIF_MCCK_PENDING)
_TIF_SYSCALL = (_TIF_SYSCALL_TRACE>>8 | _TIF_SYSCALL_AUDIT>>8 | \
@ -197,6 +197,8 @@ _TIF_SYSCALL = (_TIF_SYSCALL_TRACE>>8 | _TIF_SYSCALL_AUDIT>>8 | \
ssm __SF_EMPTY(%r15)
.endm
.section .kprobes.text, "ax"
/*
* Scheduler resume function, called by switch_to
* gpr2 = (task_struct *) prev
@ -206,30 +208,21 @@ _TIF_SYSCALL = (_TIF_SYSCALL_TRACE>>8 | _TIF_SYSCALL_AUDIT>>8 | \
*/
.globl __switch_to
__switch_to:
tm __THREAD_per+4(%r3),0xe8 # is the new process using per ?
jz __switch_to_noper # if not we're fine
stctg %c9,%c11,__SF_EMPTY(%r15)# We are using per stuff
clc __THREAD_per(24,%r3),__SF_EMPTY(%r15)
je __switch_to_noper # we got away without bashing TLB's
lctlg %c9,%c11,__THREAD_per(%r3) # Nope we didn't
__switch_to_noper:
lg %r4,__THREAD_info(%r2) # get thread_info of prev
lg %r4,__THREAD_info(%r2) # get thread_info of prev
lg %r5,__THREAD_info(%r3) # get thread_info of next
tm __TI_flags+7(%r4),_TIF_MCCK_PENDING # machine check pending?
jz __switch_to_no_mcck
ni __TI_flags+7(%r4),255-_TIF_MCCK_PENDING # clear flag in prev
lg %r4,__THREAD_info(%r3) # get thread_info of next
oi __TI_flags+7(%r4),_TIF_MCCK_PENDING # set it in next
__switch_to_no_mcck:
stmg %r6,%r15,__SF_GPRS(%r15)# store __switch_to registers of prev task
stg %r15,__THREAD_ksp(%r2) # store kernel stack to prev->tss.ksp
lg %r15,__THREAD_ksp(%r3) # load kernel stack from next->tss.ksp
lmg %r6,%r15,__SF_GPRS(%r15)# load __switch_to registers of next task
stg %r3,__LC_CURRENT # __LC_CURRENT = current task struct
lctl %c4,%c4,__TASK_pid(%r3) # load pid to control reg. 4
lg %r3,__THREAD_info(%r3) # load thread_info from task struct
stg %r3,__LC_THREAD_INFO
aghi %r3,STACK_SIZE
stg %r3,__LC_KERNEL_STACK # __LC_KERNEL_STACK = new kernel stack
jz 0f
ni __TI_flags+7(%r4),255-_TIF_MCCK_PENDING # clear flag in prev
oi __TI_flags+7(%r5),_TIF_MCCK_PENDING # set it in next
0: stmg %r6,%r15,__SF_GPRS(%r15) # store gprs of prev task
stg %r15,__THREAD_ksp(%r2) # store kernel stack of prev
lg %r15,__THREAD_ksp(%r3) # load kernel stack of next
lctl %c4,%c4,__TASK_pid(%r3) # load pid to control reg. 4
lmg %r6,%r15,__SF_GPRS(%r15) # load gprs of next task
stg %r3,__LC_CURRENT # store task struct of next
stg %r5,__LC_THREAD_INFO # store thread info of next
aghi %r5,STACK_SIZE # end of kernel stack of next
stg %r5,__LC_KERNEL_STACK # store end of kernel stack
br %r14
__critical_start:
@ -309,7 +302,7 @@ sysc_work_tif:
jo sysc_notify_resume
tm __TI_flags+7(%r12),_TIF_RESTART_SVC
jo sysc_restart
tm __TI_flags+7(%r12),_TIF_SINGLE_STEP
tm __TI_flags+7(%r12),_TIF_PER_TRAP
jo sysc_singlestep
j sysc_return # beware of critical section cleanup
@ -331,12 +324,12 @@ sysc_mcck_pending:
# _TIF_SIGPENDING is set, call do_signal
#
sysc_sigpending:
ni __TI_flags+7(%r12),255-_TIF_SINGLE_STEP # clear TIF_SINGLE_STEP
ni __TI_flags+7(%r12),255-_TIF_PER_TRAP # clear TIF_PER_TRAP
la %r2,SP_PTREGS(%r15) # load pt_regs
brasl %r14,do_signal # call do_signal
tm __TI_flags+7(%r12),_TIF_RESTART_SVC
jo sysc_restart
tm __TI_flags+7(%r12),_TIF_SINGLE_STEP
tm __TI_flags+7(%r12),_TIF_PER_TRAP
jo sysc_singlestep
j sysc_return
@ -361,14 +354,14 @@ sysc_restart:
j sysc_nr_ok # restart svc
#
# _TIF_SINGLE_STEP is set, call do_single_step
# _TIF_PER_TRAP is set, call do_per_trap
#
sysc_singlestep:
ni __TI_flags+7(%r12),255-_TIF_SINGLE_STEP # clear TIF_SINGLE_STEP
ni __TI_flags+7(%r12),255-_TIF_PER_TRAP # clear TIF_PER_TRAP
xc SP_SVCNR(2,%r15),SP_SVCNR(%r15) # clear svc number
la %r2,SP_PTREGS(%r15) # address of register-save area
larl %r14,sysc_return # load adr. of system return
jg do_single_step # branch to do_sigtrap
jg do_per_trap
#
# call tracehook_report_syscall_entry/tracehook_report_syscall_exit before
@ -524,10 +517,10 @@ pgm_no_vtime2:
lg %r1,__TI_task(%r12)
tm SP_PSW+1(%r15),0x01 # kernel per event ?
jz kernel_per
mvc __THREAD_per+__PER_atmid(2,%r1),__LC_PER_ATMID
mvc __THREAD_per+__PER_address(8,%r1),__LC_PER_ADDRESS
mvc __THREAD_per+__PER_access_id(1,%r1),__LC_PER_ACCESS_ID
oi __TI_flags+7(%r12),_TIF_SINGLE_STEP # set TIF_SINGLE_STEP
mvc __THREAD_per_cause(2,%r1),__LC_PER_CAUSE
mvc __THREAD_per_address(8,%r1),__LC_PER_ADDRESS
mvc __THREAD_per_paid(1,%r1),__LC_PER_PAID
oi __TI_flags+7(%r12),_TIF_PER_TRAP # set TIF_PER_TRAP
lgf %r3,__LC_PGM_ILC # load program interruption code
lg %r4,__LC_TRANS_EXC_CODE
REENABLE_IRQS
@ -556,10 +549,10 @@ pgm_svcper:
mvc __LC_LAST_UPDATE_TIMER(8),__LC_SYNC_ENTER_TIMER
LAST_BREAK
lg %r8,__TI_task(%r12)
mvc __THREAD_per+__PER_atmid(2,%r8),__LC_PER_ATMID
mvc __THREAD_per+__PER_address(8,%r8),__LC_PER_ADDRESS
mvc __THREAD_per+__PER_access_id(1,%r8),__LC_PER_ACCESS_ID
oi __TI_flags+7(%r12),_TIF_SINGLE_STEP # set TIF_SINGLE_STEP
mvc __THREAD_per_cause(2,%r8),__LC_PER_CAUSE
mvc __THREAD_per_address(8,%r8),__LC_PER_ADDRESS
mvc __THREAD_per_paid(1,%r8),__LC_PER_PAID
oi __TI_flags+7(%r12),_TIF_PER_TRAP # set TIF_PER_TRAP
stosm __SF_EMPTY(%r15),0x03 # reenable interrupts
lmg %r2,%r6,SP_R2(%r15) # load svc arguments
j sysc_do_svc
@ -571,7 +564,7 @@ kernel_per:
REENABLE_IRQS
xc SP_SVCNR(2,%r15),SP_SVCNR(%r15) # clear svc number
la %r2,SP_PTREGS(%r15) # address of register-save area
brasl %r14,do_single_step
brasl %r14,do_per_trap
j pgm_exit
/*
@ -868,6 +861,8 @@ restart_crash:
restart_go:
#endif
.section .kprobes.text, "ax"
#ifdef CONFIG_CHECK_STACK
/*
* The synchronous or the asynchronous stack overflowed. We are dead.

238
arch/s390/kernel/ftrace.c
View file

@ -4,7 +4,7 @@
* Copyright IBM Corp. 2009
*
* Author(s): Heiko Carstens <heiko.carstens@de.ibm.com>,
*
* Martin Schwidefsky <schwidefsky@de.ibm.com>
*/
#include <linux/hardirq.h>
@ -12,176 +12,144 @@
#include <linux/ftrace.h>
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/kprobes.h>
#include <trace/syscall.h>
#include <asm/asm-offsets.h>
#ifdef CONFIG_64BIT
#define MCOUNT_OFFSET_RET 12
#else
#define MCOUNT_OFFSET_RET 22
#endif
#ifdef CONFIG_DYNAMIC_FTRACE
void ftrace_disable_code(void);
void ftrace_disable_return(void);
void ftrace_call_code(void);
void ftrace_nop_code(void);
#define FTRACE_INSN_SIZE 4
void ftrace_enable_insn(void);
#ifdef CONFIG_64BIT
/*
* The 64-bit mcount code looks like this:
* stg %r14,8(%r15) # offset 0
* > larl %r1,<&counter> # offset 6
* > brasl %r14,_mcount # offset 12
* lg %r14,8(%r15) # offset 18
* Total length is 24 bytes. The middle two instructions of the mcount
* block get overwritten by ftrace_make_nop / ftrace_make_call.
* The 64-bit enabled ftrace code block looks like this:
* stg %r14,8(%r15) # offset 0
* > lg %r1,__LC_FTRACE_FUNC # offset 6
* > lgr %r0,%r0 # offset 12
* > basr %r14,%r1 # offset 16
* lg %r14,8(%15) # offset 18
* The return points of the mcount/ftrace function have the same offset 18.
* The 64-bit disable ftrace code block looks like this:
* stg %r14,8(%r15) # offset 0
* > jg .+18 # offset 6
* > lgr %r0,%r0 # offset 12
* > basr %r14,%r1 # offset 16
* lg %r14,8(%15) # offset 18
* The jg instruction branches to offset 24 to skip as many instructions
* as possible.
*/
asm(
" .align 4\n"
"ftrace_disable_code:\n"
" j 0f\n"
" .word 0x0024\n"
" lg %r1,"__stringify(__LC_FTRACE_FUNC)"\n"
" basr %r14,%r1\n"
"ftrace_disable_return:\n"
" lg %r14,8(15)\n"
" jg 0f\n"
" lgr %r0,%r0\n"
"0:\n");
asm(
" basr %r14,%r1\n"
"0:\n"
" .align 4\n"
"ftrace_nop_code:\n"
" j .+"__stringify(MCOUNT_INSN_SIZE)"\n");
"ftrace_enable_insn:\n"
" lg %r1,"__stringify(__LC_FTRACE_FUNC)"\n");
asm(
" .align 4\n"
"ftrace_call_code:\n"
" stg %r14,8(%r15)\n");
#define FTRACE_INSN_SIZE 6
#else /* CONFIG_64BIT */
/*
* The 31-bit mcount code looks like this:
* st %r14,4(%r15) # offset 0
* > bras %r1,0f # offset 4
* > .long _mcount # offset 8
* > .long <&counter> # offset 12
* > 0: l %r14,0(%r1) # offset 16
* > l %r1,4(%r1) # offset 20
* basr %r14,%r14 # offset 24
* l %r14,4(%r15) # offset 26
* Total length is 30 bytes. The twenty bytes starting from offset 4
* to offset 24 get overwritten by ftrace_make_nop / ftrace_make_call.
* The 31-bit enabled ftrace code block looks like this:
* st %r14,4(%r15) # offset 0
* > l %r14,__LC_FTRACE_FUNC # offset 4
* > j 0f # offset 8
* > .fill 12,1,0x07 # offset 12
* 0: basr %r14,%r14 # offset 24
* l %r14,4(%r14) # offset 26
* The return points of the mcount/ftrace function have the same offset 26.
* The 31-bit disabled ftrace code block looks like this:
* st %r14,4(%r15) # offset 0
* > j .+26 # offset 4
* > j 0f # offset 8
* > .fill 12,1,0x07 # offset 12
* 0: basr %r14,%r14 # offset 24
* l %r14,4(%r14) # offset 26
* The j instruction branches to offset 30 to skip as many instructions
* as possible.
*/
asm(
" .align 4\n"
"ftrace_disable_code:\n"
" j 1f\n"
" j 0f\n"
" l %r1,"__stringify(__LC_FTRACE_FUNC)"\n"
" basr %r14,%r1\n"
"ftrace_disable_return:\n"
" l %r14,4(%r15)\n"
" j 0f\n"
" bcr 0,%r7\n"
" bcr 0,%r7\n"
" bcr 0,%r7\n"
" bcr 0,%r7\n"
" bcr 0,%r7\n"
" bcr 0,%r7\n"
"0:\n");
asm(
" .fill 12,1,0x07\n"
"0: basr %r14,%r14\n"
"1:\n"
" .align 4\n"
"ftrace_nop_code:\n"
" j .+"__stringify(MCOUNT_INSN_SIZE)"\n");
"ftrace_enable_insn:\n"
" l %r14,"__stringify(__LC_FTRACE_FUNC)"\n");
asm(
" .align 4\n"
"ftrace_call_code:\n"
" st %r14,4(%r15)\n");
#define FTRACE_INSN_SIZE 4
#endif /* CONFIG_64BIT */
static int ftrace_modify_code(unsigned long ip,
void *old_code, int old_size,
void *new_code, int new_size)
{
unsigned char replaced[MCOUNT_INSN_SIZE];
/*
* Note: Due to modules code can disappear and change.
* We need to protect against faulting as well as code
* changing. We do this by using the probe_kernel_*
* functions.
* This however is just a simple sanity check.
*/
if (probe_kernel_read(replaced, (void *)ip, old_size))
return -EFAULT;
if (memcmp(replaced, old_code, old_size) != 0)
return -EINVAL;
if (probe_kernel_write((void *)ip, new_code, new_size))
return -EPERM;
return 0;
}
static int ftrace_make_initial_nop(struct module *mod, struct dyn_ftrace *rec,
unsigned long addr)
{
return ftrace_modify_code(rec->ip,
ftrace_call_code, FTRACE_INSN_SIZE,
ftrace_disable_code, MCOUNT_INSN_SIZE);
}
int ftrace_make_nop(struct module *mod, struct dyn_ftrace *rec,
unsigned long addr)
{
if (addr == MCOUNT_ADDR)
return ftrace_make_initial_nop(mod, rec, addr);
return ftrace_modify_code(rec->ip,
ftrace_call_code, FTRACE_INSN_SIZE,
ftrace_nop_code, FTRACE_INSN_SIZE);
if (probe_kernel_write((void *) rec->ip, ftrace_disable_code,
MCOUNT_INSN_SIZE))
return -EPERM;
return 0;
}
int ftrace_make_call(struct dyn_ftrace *rec, unsigned long addr)
{
return ftrace_modify_code(rec->ip,
ftrace_nop_code, FTRACE_INSN_SIZE,
ftrace_call_code, FTRACE_INSN_SIZE);
if (probe_kernel_write((void *) rec->ip, ftrace_enable_insn,
FTRACE_INSN_SIZE))
return -EPERM;
return 0;
}
int ftrace_update_ftrace_func(ftrace_func_t func)
{
ftrace_dyn_func = (unsigned long)func;
return 0;
}
int __init ftrace_dyn_arch_init(void *data)
{
*(unsigned long *)data = 0;
*(unsigned long *) data = 0;
return 0;
}
#endif /* CONFIG_DYNAMIC_FTRACE */
#ifdef CONFIG_FUNCTION_GRAPH_TRACER
#ifdef CONFIG_DYNAMIC_FTRACE
/*
* Patch the kernel code at ftrace_graph_caller location:
* The instruction there is branch relative on condition. The condition mask
* is either all ones (always branch aka disable ftrace_graph_caller) or all
* zeroes (nop aka enable ftrace_graph_caller).
* Instruction format for brc is a7m4xxxx where m is the condition mask.
*/
int ftrace_enable_ftrace_graph_caller(void)
{
unsigned short opcode = 0xa704;
return probe_kernel_write(ftrace_graph_caller, &opcode, sizeof(opcode));
}
int ftrace_disable_ftrace_graph_caller(void)
{
unsigned short opcode = 0xa7f4;
return probe_kernel_write(ftrace_graph_caller, &opcode, sizeof(opcode));
}
static inline unsigned long ftrace_mcount_call_adjust(unsigned long addr)
{
return addr - (ftrace_disable_return - ftrace_disable_code);
}
#else /* CONFIG_DYNAMIC_FTRACE */
static inline unsigned long ftrace_mcount_call_adjust(unsigned long addr)
{
return addr - MCOUNT_OFFSET_RET;
}
#endif /* CONFIG_DYNAMIC_FTRACE */
/*
* Hook the return address and push it in the stack of return addresses
* in current thread info.
*/
unsigned long prepare_ftrace_return(unsigned long ip, unsigned long parent)
unsigned long __kprobes prepare_ftrace_return(unsigned long parent,
unsigned long ip)
{
struct ftrace_graph_ent trace;
@ -189,14 +157,42 @@ unsigned long prepare_ftrace_return(unsigned long ip, unsigned long parent)
goto out;
if (ftrace_push_return_trace(parent, ip, &trace.depth, 0) == -EBUSY)
goto out;
trace.func = ftrace_mcount_call_adjust(ip) & PSW_ADDR_INSN;
trace.func = (ip & PSW_ADDR_INSN) - MCOUNT_OFFSET_RET;
/* Only trace if the calling function expects to. */
if (!ftrace_graph_entry(&trace)) {
current->curr_ret_stack--;
goto out;
}
parent = (unsigned long)return_to_handler;
parent = (unsigned long) return_to_handler;
out:
return parent;
}
#ifdef CONFIG_DYNAMIC_FTRACE
/*
* Patch the kernel code at ftrace_graph_caller location. The instruction
* there is branch relative and save to prepare_ftrace_return. To disable
* the call to prepare_ftrace_return we patch the bras offset to point
* directly after the instructions. To enable the call we calculate
* the original offset to prepare_ftrace_return and put it back.
*/
int ftrace_enable_ftrace_graph_caller(void)
{
unsigned short offset;
offset = ((void *) prepare_ftrace_return -
(void *) ftrace_graph_caller) / 2;
return probe_kernel_write(ftrace_graph_caller + 2,
&offset, sizeof(offset));
}
int ftrace_disable_ftrace_graph_caller(void)
{
static unsigned short offset = 0x0002;
return probe_kernel_write(ftrace_graph_caller + 2,
&offset, sizeof(offset));
}
#endif /* CONFIG_DYNAMIC_FTRACE */
#endif /* CONFIG_FUNCTION_GRAPH_TRACER */

41
arch/s390/kernel/irq.c
View file

@ -1,7 +1,5 @@
/*
* arch/s390/kernel/irq.c
*
* Copyright IBM Corp. 2004,2007
* Copyright IBM Corp. 2004,2010
* Author(s): Martin Schwidefsky (schwidefsky@de.ibm.com),
* Thomas Spatzier (tspat@de.ibm.com)
*
@ -17,12 +15,42 @@
#include <linux/proc_fs.h>
#include <linux/profile.h>
struct irq_class {
char *name;
char *desc;
};
static const struct irq_class intrclass_names[] = {
{.name = "EXT" },
{.name = "I/O" },
{.name = "CLK", .desc = "[EXT] Clock Comparator" },
{.name = "IPI", .desc = "[EXT] Signal Processor" },
{.name = "TMR", .desc = "[EXT] CPU Timer" },
{.name = "TAL", .desc = "[EXT] Timing Alert" },
{.name = "PFL", .desc = "[EXT] Pseudo Page Fault" },
{.name = "DSD", .desc = "[EXT] DASD Diag" },
{.name = "VRT", .desc = "[EXT] Virtio" },
{.name = "SCP", .desc = "[EXT] Service Call" },
{.name = "IUC", .desc = "[EXT] IUCV" },
{.name = "QAI", .desc = "[I/O] QDIO Adapter Interrupt" },
{.name = "QDI", .desc = "[I/O] QDIO Interrupt" },
{.name = "DAS", .desc = "[I/O] DASD" },
{.name = "C15", .desc = "[I/O] 3215" },
{.name = "C70", .desc = "[I/O] 3270" },
{.name = "TAP", .desc = "[I/O] Tape" },
{.name = "VMR", .desc = "[I/O] Unit Record Devices" },
{.name = "LCS", .desc = "[I/O] LCS" },
{.name = "CLW", .desc = "[I/O] CLAW" },
{.name = "CTC", .desc = "[I/O] CTC" },
{.name = "APB", .desc = "[I/O] AP Bus" },
{.name = "NMI", .desc = "[NMI] Machine Check" },
};
/*
* show_interrupts is needed by /proc/interrupts.
*/
int show_interrupts(struct seq_file *p, void *v)
{
static const char *intrclass_names[] = { "EXT", "I/O", };
int i = *(loff_t *) v, j;
get_online_cpus();
@ -34,15 +62,16 @@ int show_interrupts(struct seq_file *p, void *v)
}
if (i < NR_IRQS) {
seq_printf(p, "%s: ", intrclass_names[i]);
seq_printf(p, "%s: ", intrclass_names[i].name);
#ifndef CONFIG_SMP
seq_printf(p, "%10u ", kstat_irqs(i));
#else
for_each_online_cpu(j)
seq_printf(p, "%10u ", kstat_cpu(j).irqs[i]);
#endif
if (intrclass_names[i].desc)
seq_printf(p, " %s", intrclass_names[i].desc);
seq_putc(p, '\n');
}
put_online_cpus();
return 0;

472
arch/s390/kernel/kprobes.c
View file

@ -32,34 +32,14 @@
#include <linux/slab.h>
#include <linux/hardirq.h>
DEFINE_PER_CPU(struct kprobe *, current_kprobe) = NULL;
DEFINE_PER_CPU(struct kprobe *, current_kprobe);
DEFINE_PER_CPU(struct kprobe_ctlblk, kprobe_ctlblk);
struct kretprobe_blackpoint kretprobe_blacklist[] = {{NULL, NULL}};
struct kretprobe_blackpoint kretprobe_blacklist[] = { };
int __kprobes arch_prepare_kprobe(struct kprobe *p)
static int __kprobes is_prohibited_opcode(kprobe_opcode_t *insn)
{
/* Make sure the probe isn't going on a difficult instruction */
if (is_prohibited_opcode((kprobe_opcode_t *) p->addr))
return -EINVAL;
if ((unsigned long)p->addr & 0x01)
return -EINVAL;
/* Use the get_insn_slot() facility for correctness */
if (!(p->ainsn.insn = get_insn_slot()))
return -ENOMEM;
memcpy(p->ainsn.insn, p->addr, MAX_INSN_SIZE * sizeof(kprobe_opcode_t));
get_instruction_type(&p->ainsn);
p->opcode = *p->addr;
return 0;
}
int __kprobes is_prohibited_opcode(kprobe_opcode_t *instruction)
{
switch (*(__u8 *) instruction) {
switch (insn[0] >> 8) {
case 0x0c: /* bassm */
case 0x0b: /* bsm */
case 0x83: /* diag */
@ -68,7 +48,7 @@ int __kprobes is_prohibited_opcode(kprobe_opcode_t *instruction)
case 0xad: /* stosm */
return -EINVAL;
}
switch (*(__u16 *) instruction) {
switch (insn[0]) {
case 0x0101: /* pr */
case 0xb25a: /* bsa */
case 0xb240: /* bakr */
@ -81,93 +61,92 @@ int __kprobes is_prohibited_opcode(kprobe_opcode_t *instruction)
return 0;
}
void __kprobes get_instruction_type(struct arch_specific_insn *ainsn)
static int __kprobes get_fixup_type(kprobe_opcode_t *insn)
{
/* default fixup method */
ainsn->fixup = FIXUP_PSW_NORMAL;
int fixup = FIXUP_PSW_NORMAL;
/* save r1 operand */
ainsn->reg = (*ainsn->insn & 0xf0) >> 4;
/* save the instruction length (pop 5-5) in bytes */
switch (*(__u8 *) (ainsn->insn) >> 6) {
case 0:
ainsn->ilen = 2;
break;
case 1:
case 2:
ainsn->ilen = 4;
break;
case 3:
ainsn->ilen = 6;
break;
}
switch (*(__u8 *) ainsn->insn) {
switch (insn[0] >> 8) {
case 0x05: /* balr */
case 0x0d: /* basr */
ainsn->fixup = FIXUP_RETURN_REGISTER;
fixup = FIXUP_RETURN_REGISTER;
/* if r2 = 0, no branch will be taken */
if ((*ainsn->insn & 0x0f) == 0)
ainsn->fixup |= FIXUP_BRANCH_NOT_TAKEN;
if ((insn[0] & 0x0f) == 0)
fixup |= FIXUP_BRANCH_NOT_TAKEN;
break;
case 0x06: /* bctr */
case 0x07: /* bcr */
ainsn->fixup = FIXUP_BRANCH_NOT_TAKEN;
fixup = FIXUP_BRANCH_NOT_TAKEN;
break;
case 0x45: /* bal */
case 0x4d: /* bas */
ainsn->fixup = FIXUP_RETURN_REGISTER;
fixup = FIXUP_RETURN_REGISTER;
break;
case 0x47: /* bc */
case 0x46: /* bct */
case 0x86: /* bxh */
case 0x87: /* bxle */
ainsn->fixup = FIXUP_BRANCH_NOT_TAKEN;
fixup = FIXUP_BRANCH_NOT_TAKEN;
break;
case 0x82: /* lpsw */
ainsn->fixup = FIXUP_NOT_REQUIRED;
fixup = FIXUP_NOT_REQUIRED;
break;
case 0xb2: /* lpswe */
if (*(((__u8 *) ainsn->insn) + 1) == 0xb2) {
ainsn->fixup = FIXUP_NOT_REQUIRED;
}
if ((insn[0] & 0xff) == 0xb2)
fixup = FIXUP_NOT_REQUIRED;
break;
case 0xa7: /* bras */
if ((*ainsn->insn & 0x0f) == 0x05) {
ainsn->fixup |= FIXUP_RETURN_REGISTER;
}
if ((insn[0] & 0x0f) == 0x05)
fixup |= FIXUP_RETURN_REGISTER;
break;
case 0xc0:
if ((*ainsn->insn & 0x0f) == 0x00 /* larl */
|| (*ainsn->insn & 0x0f) == 0x05) /* brasl */
ainsn->fixup |= FIXUP_RETURN_REGISTER;
if ((insn[0] & 0x0f) == 0x00 || /* larl */
(insn[0] & 0x0f) == 0x05) /* brasl */
fixup |= FIXUP_RETURN_REGISTER;
break;
case 0xeb:
if (*(((__u8 *) ainsn->insn) + 5 ) == 0x44 || /* bxhg */
*(((__u8 *) ainsn->insn) + 5) == 0x45) {/* bxleg */
ainsn->fixup = FIXUP_BRANCH_NOT_TAKEN;
}
if ((insn[2] & 0xff) == 0x44 || /* bxhg */
(insn[2] & 0xff) == 0x45) /* bxleg */
fixup = FIXUP_BRANCH_NOT_TAKEN;
break;
case 0xe3: /* bctg */
if (*(((__u8 *) ainsn->insn) + 5) == 0x46) {
ainsn->fixup = FIXUP_BRANCH_NOT_TAKEN;
}
if ((insn[2] & 0xff) == 0x46)
fixup = FIXUP_BRANCH_NOT_TAKEN;
break;
}
return fixup;
}
int __kprobes arch_prepare_kprobe(struct kprobe *p)
{
if ((unsigned long) p->addr & 0x01)
return -EINVAL;
/* Make sure the probe isn't going on a difficult instruction */
if (is_prohibited_opcode(p->addr))
return -EINVAL;
p->opcode = *p->addr;
memcpy(p->ainsn.insn, p->addr, ((p->opcode >> 14) + 3) & -2);
return 0;
}
struct ins_replace_args {
kprobe_opcode_t *ptr;
kprobe_opcode_t opcode;
};
static int __kprobes swap_instruction(void *aref)
{
struct kprobe_ctlblk *kcb = get_kprobe_ctlblk();
unsigned long status = kcb->kprobe_status;
struct ins_replace_args *args = aref;
int rc;
kcb->kprobe_status = KPROBE_SWAP_INST;
rc = probe_kernel_write(args->ptr, &args->new, sizeof(args->new));
probe_kernel_write(args->ptr, &args->opcode, sizeof(args->opcode));
kcb->kprobe_status = status;
return rc;
return 0;
}
void __kprobes arch_arm_kprobe(struct kprobe *p)
@ -175,8 +154,7 @@ void __kprobes arch_arm_kprobe(struct kprobe *p)
struct ins_replace_args args;
args.ptr = p->addr;
args.old = p->opcode;
args.new = BREAKPOINT_INSTRUCTION;
args.opcode = BREAKPOINT_INSTRUCTION;
stop_machine(swap_instruction, &args, NULL);
}
@ -185,64 +163,69 @@ void __kprobes arch_disarm_kprobe(struct kprobe *p)
struct ins_replace_args args;
args.ptr = p->addr;
args.old = BREAKPOINT_INSTRUCTION;
args.new = p->opcode;
args.opcode = p->opcode;
stop_machine(swap_instruction, &args, NULL);
}
void __kprobes arch_remove_kprobe(struct kprobe *p)
{
if (p->ainsn.insn) {
free_insn_slot(p->ainsn.insn, 0);
p->ainsn.insn = NULL;
}
}
static void __kprobes prepare_singlestep(struct kprobe *p, struct pt_regs *regs)
static void __kprobes enable_singlestep(struct kprobe_ctlblk *kcb,
struct pt_regs *regs,
unsigned long ip)
{
per_cr_bits kprobe_per_regs[1];
struct per_regs per_kprobe;
memset(kprobe_per_regs, 0, sizeof(per_cr_bits));
regs->psw.addr = (unsigned long)p->ainsn.insn | PSW_ADDR_AMODE;
/* Set up the PER control registers %cr9-%cr11 */
per_kprobe.control = PER_EVENT_IFETCH;
per_kprobe.start = ip;
per_kprobe.end = ip;
/* Set up the per control reg info, will pass to lctl */
kprobe_per_regs[0].em_instruction_fetch = 1;
kprobe_per_regs[0].starting_addr = (unsigned long)p->ainsn.insn;
kprobe_per_regs[0].ending_addr = (unsigned long)p->ainsn.insn + 1;
/* Save control regs and psw mask */
__ctl_store(kcb->kprobe_saved_ctl, 9, 11);
kcb->kprobe_saved_imask = regs->psw.mask &
(PSW_MASK_PER | PSW_MASK_IO | PSW_MASK_EXT);
/* Set the PER control regs, turns on single step for this address */
__ctl_load(kprobe_per_regs, 9, 11);
/* Set PER control regs, turns on single step for the given address */
__ctl_load(per_kprobe, 9, 11);
regs->psw.mask |= PSW_MASK_PER;
regs->psw.mask &= ~(PSW_MASK_IO | PSW_MASK_EXT);
regs->psw.addr = ip | PSW_ADDR_AMODE;
}
static void __kprobes save_previous_kprobe(struct kprobe_ctlblk *kcb)
static void __kprobes disable_singlestep(struct kprobe_ctlblk *kcb,
struct pt_regs *regs,
unsigned long ip)
{
kcb->prev_kprobe.kp = kprobe_running();
kcb->prev_kprobe.status = kcb->kprobe_status;
kcb->prev_kprobe.kprobe_saved_imask = kcb->kprobe_saved_imask;
memcpy(kcb->prev_kprobe.kprobe_saved_ctl, kcb->kprobe_saved_ctl,
sizeof(kcb->kprobe_saved_ctl));
/* Restore control regs and psw mask, set new psw address */
__ctl_load(kcb->kprobe_saved_ctl, 9, 11);
regs->psw.mask &= ~PSW_MASK_PER;
regs->psw.mask |= kcb->kprobe_saved_imask;
regs->psw.addr = ip | PSW_ADDR_AMODE;
}
static void __kprobes restore_previous_kprobe(struct kprobe_ctlblk *kcb)
/*
* Activate a kprobe by storing its pointer to current_kprobe. The
* previous kprobe is stored in kcb->prev_kprobe. A stack of up to
* two kprobes can be active, see KPROBE_REENTER.
*/
static void __kprobes push_kprobe(struct kprobe_ctlblk *kcb, struct kprobe *p)
{
kcb->prev_kprobe.kp = __get_cpu_var(current_kprobe);
kcb->prev_kprobe.status = kcb->kprobe_status;
__get_cpu_var(current_kprobe) = p;
}
/*
* Deactivate a kprobe by backing up to the previous state. If the
* current state is KPROBE_REENTER prev_kprobe.kp will be non-NULL,
* for any other state prev_kprobe.kp will be NULL.
*/
static void __kprobes pop_kprobe(struct kprobe_ctlblk *kcb)
{
__get_cpu_var(current_kprobe) = kcb->prev_kprobe.kp;
kcb->kprobe_status = kcb->prev_kprobe.status;
kcb->kprobe_saved_imask = kcb->prev_kprobe.kprobe_saved_imask;
memcpy(kcb->kprobe_saved_ctl, kcb->prev_kprobe.kprobe_saved_ctl,
sizeof(kcb->kprobe_saved_ctl));
}
static void __kprobes set_current_kprobe(struct kprobe *p, struct pt_regs *regs,
struct kprobe_ctlblk *kcb)
{
__get_cpu_var(current_kprobe) = p;
/* Save the interrupt and per flags */
kcb->kprobe_saved_imask = regs->psw.mask &
(PSW_MASK_PER | PSW_MASK_IO | PSW_MASK_EXT);
/* Save the control regs that govern PER */
__ctl_store(kcb->kprobe_saved_ctl, 9, 11);
}
void __kprobes arch_prepare_kretprobe(struct kretprobe_instance *ri,
@ -251,79 +234,104 @@ void __kprobes arch_prepare_kretprobe(struct kretprobe_instance *ri,
ri->ret_addr = (kprobe_opcode_t *) regs->gprs[14];
/* Replace the return addr with trampoline addr */
regs->gprs[14] = (unsigned long)&kretprobe_trampoline;
regs->gprs[14] = (unsigned long) &kretprobe_trampoline;
}
static void __kprobes kprobe_reenter_check(struct kprobe_ctlblk *kcb,
struct kprobe *p)
{
switch (kcb->kprobe_status) {
case KPROBE_HIT_SSDONE:
case KPROBE_HIT_ACTIVE:
kprobes_inc_nmissed_count(p);
break;
case KPROBE_HIT_SS:
case KPROBE_REENTER:
default:
/*
* A kprobe on the code path to single step an instruction
* is a BUG. The code path resides in the .kprobes.text
* section and is executed with interrupts disabled.
*/
printk(KERN_EMERG "Invalid kprobe detected at %p.\n", p->addr);
dump_kprobe(p);
BUG();
}
}
static int __kprobes kprobe_handler(struct pt_regs *regs)
{
struct kprobe *p;
int ret = 0;
unsigned long *addr = (unsigned long *)
((regs->psw.addr & PSW_ADDR_INSN) - 2);
struct kprobe_ctlblk *kcb;
struct kprobe *p;
/*
* We don't want to be preempted for the entire
* duration of kprobe processing
* We want to disable preemption for the entire duration of kprobe
* processing. That includes the calls to the pre/post handlers
* and single stepping the kprobe instruction.
*/
preempt_disable();
kcb = get_kprobe_ctlblk();
p = get_kprobe((void *)((regs->psw.addr & PSW_ADDR_INSN) - 2));
/* Check we're not actually recursing */
if (kprobe_running()) {
p = get_kprobe(addr);
if (p) {
if (kcb->kprobe_status == KPROBE_HIT_SS &&
*p->ainsn.insn == BREAKPOINT_INSTRUCTION) {
regs->psw.mask &= ~PSW_MASK_PER;
regs->psw.mask |= kcb->kprobe_saved_imask;
goto no_kprobe;
}
/* We have reentered the kprobe_handler(), since
* another probe was hit while within the handler.
* We here save the original kprobes variables and
* just single step on the instruction of the new probe
* without calling any user handlers.
if (p) {
if (kprobe_running()) {
/*
* We have hit a kprobe while another is still
* active. This can happen in the pre and post
* handler. Single step the instruction of the
* new probe but do not call any handler function
* of this secondary kprobe.
* push_kprobe and pop_kprobe saves and restores
* the currently active kprobe.
*/
save_previous_kprobe(kcb);
set_current_kprobe(p, regs, kcb);
kprobes_inc_nmissed_count(p);
prepare_singlestep(p, regs);
kprobe_reenter_check(kcb, p);
push_kprobe(kcb, p);
kcb->kprobe_status = KPROBE_REENTER;
return 1;
} else {
p = __get_cpu_var(current_kprobe);
if (p->break_handler && p->break_handler(p, regs)) {
goto ss_probe;
}
/*
* If we have no pre-handler or it returned 0, we
* continue with single stepping. If we have a
* pre-handler and it returned non-zero, it prepped
* for calling the break_handler below on re-entry
* for jprobe processing, so get out doing nothing
* more here.
*/
push_kprobe(kcb, p);
kcb->kprobe_status = KPROBE_HIT_ACTIVE;
if (p->pre_handler && p->pre_handler(p, regs))
return 1;
kcb->kprobe_status = KPROBE_HIT_SS;
}
goto no_kprobe;
}
p = get_kprobe(addr);
if (!p)
/*
* No kprobe at this address. The fault has not been
* caused by a kprobe breakpoint. The race of breakpoint
* vs. kprobe remove does not exist because on s390 we
* use stop_machine to arm/disarm the breakpoints.
*/
goto no_kprobe;
kcb->kprobe_status = KPROBE_HIT_ACTIVE;
set_current_kprobe(p, regs, kcb);
if (p->pre_handler && p->pre_handler(p, regs))
/* handler has already set things up, so skip ss setup */
enable_singlestep(kcb, regs, (unsigned long) p->ainsn.insn);
return 1;
ss_probe:
prepare_singlestep(p, regs);
kcb->kprobe_status = KPROBE_HIT_SS;
return 1;
no_kprobe:
} else if (kprobe_running()) {
p = __get_cpu_var(current_kprobe);
if (p->break_handler && p->break_handler(p, regs)) {
/*
* Continuation after the jprobe completed and
* caused the jprobe_return trap. The jprobe
* break_handler "returns" to the original
* function that still has the kprobe breakpoint
* installed. We continue with single stepping.
*/
kcb->kprobe_status = KPROBE_HIT_SS;
enable_singlestep(kcb, regs,
(unsigned long) p->ainsn.insn);
return 1;
} /* else:
* No kprobe at this address and the current kprobe
* has no break handler (no jprobe!). The kernel just
* exploded, let the standard trap handler pick up the
* pieces.
*/
} /* else:
* No kprobe at this address and no active kprobe. The trap has
* not been caused by a kprobe breakpoint. The race of breakpoint
* vs. kprobe remove does not exist because on s390 as we use
* stop_machine to arm/disarm the breakpoints.
*/
preempt_enable_no_resched();
return ret;
return 0;
}
/*
@ -344,12 +352,12 @@ static void __used kretprobe_trampoline_holder(void)
static int __kprobes trampoline_probe_handler(struct kprobe *p,
struct pt_regs *regs)
{
struct kretprobe_instance *ri = NULL;
struct kretprobe_instance *ri;
struct hlist_head *head, empty_rp;
struct hlist_node *node, *tmp;
unsigned long flags, orig_ret_address = 0;
unsigned long trampoline_address = (unsigned long)&kretprobe_trampoline;
kprobe_opcode_t *correct_ret_addr = NULL;
unsigned long flags, orig_ret_address;
unsigned long trampoline_address;
kprobe_opcode_t *correct_ret_addr;
INIT_HLIST_HEAD(&empty_rp);
kretprobe_hash_lock(current, &head, &flags);
@ -367,12 +375,16 @@ static int __kprobes trampoline_probe_handler(struct kprobe *p,
* real return address, and all the rest will point to
* kretprobe_trampoline
*/
ri = NULL;
orig_ret_address = 0;
correct_ret_addr = NULL;
trampoline_address = (unsigned long) &kretprobe_trampoline;
hlist_for_each_entry_safe(ri, node, tmp, head, hlist) {
if (ri->task != current)
/* another task is sharing our hash bucket */
continue;
orig_ret_address = (unsigned long)ri->ret_addr;
orig_ret_address = (unsigned long) ri->ret_addr;
if (orig_ret_address != trampoline_address)
/*
@ -391,7 +403,7 @@ static int __kprobes trampoline_probe_handler(struct kprobe *p,
/* another task is sharing our hash bucket */
continue;
orig_ret_address = (unsigned long)ri->ret_addr;
orig_ret_address = (unsigned long) ri->ret_addr;
if (ri->rp && ri->rp->handler) {
ri->ret_addr = correct_ret_addr;
@ -400,19 +412,18 @@ static int __kprobes trampoline_probe_handler(struct kprobe *p,
recycle_rp_inst(ri, &empty_rp);
if (orig_ret_address != trampoline_address) {
if (orig_ret_address != trampoline_address)
/*
* This is the real return address. Any other
* instances associated with this task are for
* other calls deeper on the call stack
*/
break;
}
}
regs->psw.addr = orig_ret_address | PSW_ADDR_AMODE;
reset_current_kprobe();
pop_kprobe(get_kprobe_ctlblk());
kretprobe_hash_unlock(current, &flags);
preempt_enable_no_resched();
@ -439,55 +450,42 @@ static int __kprobes trampoline_probe_handler(struct kprobe *p,
static void __kprobes resume_execution(struct kprobe *p, struct pt_regs *regs)
{
struct kprobe_ctlblk *kcb = get_kprobe_ctlblk();
unsigned long ip = regs->psw.addr & PSW_ADDR_INSN;
int fixup = get_fixup_type(p->ainsn.insn);
regs->psw.addr &= PSW_ADDR_INSN;
if (fixup & FIXUP_PSW_NORMAL)
ip += (unsigned long) p->addr - (unsigned long) p->ainsn.insn;
if (p->ainsn.fixup & FIXUP_PSW_NORMAL)
regs->psw.addr = (unsigned long)p->addr +
((unsigned long)regs->psw.addr -
(unsigned long)p->ainsn.insn);
if (fixup & FIXUP_BRANCH_NOT_TAKEN) {
int ilen = ((p->ainsn.insn[0] >> 14) + 3) & -2;
if (ip - (unsigned long) p->ainsn.insn == ilen)
ip = (unsigned long) p->addr + ilen;
}
if (p->ainsn.fixup & FIXUP_BRANCH_NOT_TAKEN)
if ((unsigned long)regs->psw.addr -
(unsigned long)p->ainsn.insn == p->ainsn.ilen)
regs->psw.addr = (unsigned long)p->addr + p->ainsn.ilen;
if (fixup & FIXUP_RETURN_REGISTER) {
int reg = (p->ainsn.insn[0] & 0xf0) >> 4;
regs->gprs[reg] += (unsigned long) p->addr -
(unsigned long) p->ainsn.insn;
}
if (p->ainsn.fixup & FIXUP_RETURN_REGISTER)
regs->gprs[p->ainsn.reg] = ((unsigned long)p->addr +
(regs->gprs[p->ainsn.reg] -
(unsigned long)p->ainsn.insn))
| PSW_ADDR_AMODE;
regs->psw.addr |= PSW_ADDR_AMODE;
/* turn off PER mode */
regs->psw.mask &= ~PSW_MASK_PER;
/* Restore the original per control regs */
__ctl_load(kcb->kprobe_saved_ctl, 9, 11);
regs->psw.mask |= kcb->kprobe_saved_imask;
disable_singlestep(kcb, regs, ip);
}
static int __kprobes post_kprobe_handler(struct pt_regs *regs)
{
struct kprobe *cur = kprobe_running();
struct kprobe_ctlblk *kcb = get_kprobe_ctlblk();
struct kprobe *p = kprobe_running();
if (!cur)
if (!p)
return 0;
if ((kcb->kprobe_status != KPROBE_REENTER) && cur->post_handler) {
if (kcb->kprobe_status != KPROBE_REENTER && p->post_handler) {
kcb->kprobe_status = KPROBE_HIT_SSDONE;
cur->post_handler(cur, regs, 0);
p->post_handler(p, regs, 0);
}
resume_execution(cur, regs);
/*Restore back the original saved kprobes variables and continue. */
if (kcb->kprobe_status == KPROBE_REENTER) {
restore_previous_kprobe(kcb);
goto out;
}
reset_current_kprobe();
out:
resume_execution(p, regs);
pop_kprobe(kcb);
preempt_enable_no_resched();
/*
@ -495,17 +493,16 @@ static int __kprobes post_kprobe_handler(struct pt_regs *regs)
* will have PER set, in which case, continue the remaining processing
* of do_single_step, as if this is not a probe hit.
*/
if (regs->psw.mask & PSW_MASK_PER) {
if (regs->psw.mask & PSW_MASK_PER)
return 0;
}
return 1;
}
static int __kprobes kprobe_trap_handler(struct pt_regs *regs, int trapnr)
{
struct kprobe *cur = kprobe_running();
struct kprobe_ctlblk *kcb = get_kprobe_ctlblk();
struct kprobe *p = kprobe_running();
const struct exception_table_entry *entry;
switch(kcb->kprobe_status) {
@ -521,14 +518,8 @@ static int __kprobes kprobe_trap_handler(struct pt_regs *regs, int trapnr)
* and allow the page fault handler to continue as a
* normal page fault.
*/
regs->psw.addr = (unsigned long)cur->addr | PSW_ADDR_AMODE;
regs->psw.mask &= ~PSW_MASK_PER;
regs->psw.mask |= kcb->kprobe_saved_imask;
if (kcb->kprobe_status == KPROBE_REENTER)
restore_previous_kprobe(kcb);
else {
reset_current_kprobe();
}
disable_singlestep(kcb, regs, (unsigned long) p->addr);
pop_kprobe(kcb);
preempt_enable_no_resched();
break;
case KPROBE_HIT_ACTIVE:
@ -538,7 +529,7 @@ static int __kprobes kprobe_trap_handler(struct pt_regs *regs, int trapnr)
* we can also use npre/npostfault count for accouting
* these specific fault cases.
*/
kprobes_inc_nmissed_count(cur);
kprobes_inc_nmissed_count(p);
/*
* We come here because instructions in the pre/post
@ -547,7 +538,7 @@ static int __kprobes kprobe_trap_handler(struct pt_regs *regs, int trapnr)
* copy_from_user(), get_user() etc. Let the
* user-specified handler try to fix it first.
*/
if (cur->fault_handler && cur->fault_handler(cur, regs, trapnr))
if (p->fault_handler && p->fault_handler(p, regs, trapnr))
return 1;
/*
@ -589,7 +580,7 @@ int __kprobes kprobe_fault_handler(struct pt_regs *regs, int trapnr)
int __kprobes kprobe_exceptions_notify(struct notifier_block *self,
unsigned long val, void *data)
{
struct die_args *args = (struct die_args *)data;
struct die_args *args = (struct die_args *) data;
struct pt_regs *regs = args->regs;
int ret = NOTIFY_DONE;
@ -598,16 +589,16 @@ int __kprobes kprobe_exceptions_notify(struct notifier_block *self,
switch (val) {
case DIE_BPT:
if (kprobe_handler(args->regs))
if (kprobe_handler(regs))
ret = NOTIFY_STOP;
break;
case DIE_SSTEP:
if (post_kprobe_handler(args->regs))
if (post_kprobe_handler(regs))
ret = NOTIFY_STOP;
break;
case DIE_TRAP:
if (!preemptible() && kprobe_running() &&
kprobe_trap_handler(args->regs, args->trapnr))
kprobe_trap_handler(regs, args->trapnr))
ret = NOTIFY_STOP;
break;
default:
@ -623,23 +614,19 @@ int __kprobes kprobe_exceptions_notify(struct notifier_block *self,
int __kprobes setjmp_pre_handler(struct kprobe *p, struct pt_regs *regs)
{
struct jprobe *jp = container_of(p, struct jprobe, kp);
unsigned long addr;
struct kprobe_ctlblk *kcb = get_kprobe_ctlblk();
unsigned long stack;
memcpy(&kcb->jprobe_saved_regs, regs, sizeof(struct pt_regs));
/* setup return addr to the jprobe handler routine */
regs->psw.addr = (unsigned long)(jp->entry) | PSW_ADDR_AMODE;
regs->psw.addr = (unsigned long) jp->entry | PSW_ADDR_AMODE;
regs->psw.mask &= ~(PSW_MASK_IO | PSW_MASK_EXT);
/* r14 is the function return address */
kcb->jprobe_saved_r14 = (unsigned long)regs->gprs[14];
/* r15 is the stack pointer */
kcb->jprobe_saved_r15 = (unsigned long)regs->gprs[15];
addr = (unsigned long)kcb->jprobe_saved_r15;
stack = (unsigned long) regs->gprs[15];
memcpy(kcb->jprobes_stack, (kprobe_opcode_t *) addr,
MIN_STACK_SIZE(addr));
memcpy(kcb->jprobes_stack, (void *) stack, MIN_STACK_SIZE(stack));
return 1;
}
@ -656,30 +643,29 @@ void __kprobes jprobe_return_end(void)
int __kprobes longjmp_break_handler(struct kprobe *p, struct pt_regs *regs)
{
struct kprobe_ctlblk *kcb = get_kprobe_ctlblk();
unsigned long stack_addr = (unsigned long)(kcb->jprobe_saved_r15);
unsigned long stack;
stack = (unsigned long) kcb->jprobe_saved_regs.gprs[15];
/* Put the regs back */
memcpy(regs, &kcb->jprobe_saved_regs, sizeof(struct pt_regs));
/* put the stack back */
memcpy((kprobe_opcode_t *) stack_addr, kcb->jprobes_stack,
MIN_STACK_SIZE(stack_addr));
memcpy((void *) stack, kcb->jprobes_stack, MIN_STACK_SIZE(stack));
preempt_enable_no_resched();
return 1;
}
static struct kprobe trampoline_p = {
.addr = (kprobe_opcode_t *) & kretprobe_trampoline,
static struct kprobe trampoline = {
.addr = (kprobe_opcode_t *) &kretprobe_trampoline,
.pre_handler = trampoline_probe_handler
};
int __init arch_init_kprobes(void)
{
return register_kprobe(&trampoline_p);
return register_kprobe(&trampoline);
}
int __kprobes arch_trampoline_kprobe(struct kprobe *p)
{
if (p->addr == (kprobe_opcode_t *) & kretprobe_trampoline)
return 1;
return 0;
return p->addr == (kprobe_opcode_t *) &kretprobe_trampoline;
}

32
arch/s390/kernel/mcount.S
View file

@ -7,6 +7,8 @@
#include <asm/asm-offsets.h>
.section .kprobes.text, "ax"
.globl ftrace_stub
ftrace_stub:
br %r14
@ -16,22 +18,12 @@ _mcount:
#ifdef CONFIG_DYNAMIC_FTRACE
br %r14
.data
.globl ftrace_dyn_func
ftrace_dyn_func:
.long ftrace_stub
.previous
.globl ftrace_caller
ftrace_caller:
#endif
stm %r2,%r5,16(%r15)
bras %r1,2f
#ifdef CONFIG_DYNAMIC_FTRACE
0: .long ftrace_dyn_func
#else
0: .long ftrace_trace_function
#endif
1: .long function_trace_stop
2: l %r2,1b-0b(%r1)
icm %r2,0xf,0(%r2)
@ -47,21 +39,15 @@ ftrace_caller:
l %r14,0(%r14)
basr %r14,%r14
#ifdef CONFIG_FUNCTION_GRAPH_TRACER
#ifdef CONFIG_DYNAMIC_FTRACE
l %r2,100(%r15)
l %r3,152(%r15)
.globl ftrace_graph_caller
ftrace_graph_caller:
# This unconditional branch gets runtime patched. Change only if
# you know what you are doing. See ftrace_enable_graph_caller().
j 1f
#endif
bras %r1,0f
.long prepare_ftrace_return
0: l %r2,152(%r15)
l %r4,0(%r1)
l %r3,100(%r15)
basr %r14,%r4
st %r2,100(%r15)
1:
# The bras instruction gets runtime patched to call prepare_ftrace_return.
# See ftrace_enable_ftrace_graph_caller. The patched instruction is:
# bras %r14,prepare_ftrace_return
bras %r14,0f
0: st %r2,100(%r15)
#endif
ahi %r15,96
l %r14,56(%r15)

29
arch/s390/kernel/mcount64.S
View file

@ -7,6 +7,8 @@
#include <asm/asm-offsets.h>
.section .kprobes.text, "ax"
.globl ftrace_stub
ftrace_stub:
br %r14
@ -16,12 +18,6 @@ _mcount:
#ifdef CONFIG_DYNAMIC_FTRACE
br %r14
.data
.globl ftrace_dyn_func
ftrace_dyn_func:
.quad ftrace_stub
.previous
.globl ftrace_caller
ftrace_caller:
#endif
@ -35,26 +31,19 @@ ftrace_caller:
stg %r1,__SF_BACKCHAIN(%r15)
lgr %r2,%r14
lg %r3,168(%r15)
#ifdef CONFIG_DYNAMIC_FTRACE
larl %r14,ftrace_dyn_func
#else
larl %r14,ftrace_trace_function
#endif
lg %r14,0(%r14)
basr %r14,%r14
#ifdef CONFIG_FUNCTION_GRAPH_TRACER
#ifdef CONFIG_DYNAMIC_FTRACE
lg %r2,168(%r15)
lg %r3,272(%r15)
.globl ftrace_graph_caller
ftrace_graph_caller:
# This unconditional branch gets runtime patched. Change only if
# you know what you are doing. See ftrace_enable_graph_caller().
j 0f
#endif
lg %r2,272(%r15)
lg %r3,168(%r15)
brasl %r14,prepare_ftrace_return
stg %r2,168(%r15)
0:
# The bras instruction gets runtime patched to call prepare_ftrace_return.
# See ftrace_enable_ftrace_graph_caller. The patched instruction is:
# bras %r14,prepare_ftrace_return
bras %r14,0f
0: stg %r2,168(%r15)
#endif
aghi %r15,160
lmg %r2,%r5,32(%r15)

3
arch/s390/kernel/nmi.c
View file

@ -8,6 +8,7 @@
* Heiko Carstens <heiko.carstens@de.ibm.com>,
*/
#include <linux/kernel_stat.h>
#include <linux/init.h>
#include <linux/errno.h>
#include <linux/hardirq.h>
@ -255,7 +256,7 @@ void notrace s390_do_machine_check(struct pt_regs *regs)
nmi_enter();
s390_idle_check(regs, S390_lowcore.mcck_clock,
S390_lowcore.mcck_enter_timer);
kstat_cpu(smp_processor_id()).irqs[NMI_NMI]++;
mci = (struct mci *) &S390_lowcore.mcck_interruption_code;
mcck = &__get_cpu_var(cpu_mcck);
umode = user_mode(regs);

21
arch/s390/kernel/process.c
View file

@ -32,6 +32,7 @@
#include <linux/kernel_stat.h>
#include <linux/syscalls.h>
#include <linux/compat.h>
#include <linux/kprobes.h>
#include <asm/compat.h>
#include <asm/uaccess.h>
#include <asm/pgtable.h>
@ -41,6 +42,7 @@
#include <asm/irq.h>
#include <asm/timer.h>
#include <asm/nmi.h>
#include <asm/smp.h>
#include "entry.h"
asmlinkage void ret_from_fork(void) asm ("ret_from_fork");
@ -75,13 +77,8 @@ unsigned long thread_saved_pc(struct task_struct *tsk)
*/
static void default_idle(void)
{
/* CPU is going idle. */
#ifdef CONFIG_HOTPLUG_CPU
if (cpu_is_offline(smp_processor_id())) {
preempt_enable_no_resched();
if (cpu_is_offline(smp_processor_id()))
cpu_die();
}
#endif
local_irq_disable();
if (need_resched()) {
local_irq_enable();
@ -116,15 +113,17 @@ void cpu_idle(void)
}
}
extern void kernel_thread_starter(void);
extern void __kprobes kernel_thread_starter(void);
asm(
".align 4\n"
".section .kprobes.text, \"ax\"\n"
".global kernel_thread_starter\n"
"kernel_thread_starter:\n"
" la 2,0(10)\n"
" basr 14,9\n"
" la 2,0\n"
" br 11\n");
" br 11\n"
".previous\n");
int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags)
{
@ -214,8 +213,10 @@ int copy_thread(unsigned long clone_flags, unsigned long new_stackp,
/* start new process with ar4 pointing to the correct address space */
p->thread.mm_segment = get_fs();
/* Don't copy debug registers */
memset(&p->thread.per_info, 0, sizeof(p->thread.per_info));
memset(&p->thread.per_user, 0, sizeof(p->thread.per_user));
memset(&p->thread.per_event, 0, sizeof(p->thread.per_event));
clear_tsk_thread_flag(p, TIF_SINGLE_STEP);
clear_tsk_thread_flag(p, TIF_PER_TRAP);
/* Initialize per thread user and system timer values */
ti = task_thread_info(p);
ti->user_timer = 0;

20
arch/s390/kernel/processor.c
View file

@ -13,7 +13,7 @@
#include <linux/smp.h>
#include <linux/seq_file.h>
#include <linux/delay.h>
#include <linux/cpu.h>
#include <asm/elf.h>
#include <asm/lowcore.h>
#include <asm/param.h>
@ -34,17 +34,6 @@ void __cpuinit cpu_init(void)
enter_lazy_tlb(&init_mm, current);
}
/*
* print_cpu_info - print basic information about a cpu
*/
void __cpuinit print_cpu_info(void)
{
struct cpuid *id = &per_cpu(cpu_id, smp_processor_id());
pr_info("Processor %d started, address %d, identification %06X\n",
S390_lowcore.cpu_nr, stap(), id->ident);
}
/*
* show_cpuinfo - Get information on one CPU for use by procfs.
*/
@ -57,9 +46,8 @@ static int show_cpuinfo(struct seq_file *m, void *v)
unsigned long n = (unsigned long) v - 1;
int i;
s390_adjust_jiffies();
preempt_disable();
if (!n) {
s390_adjust_jiffies();
seq_printf(m, "vendor_id : IBM/S390\n"
"# processors : %i\n"
"bogomips per cpu: %lu.%02lu\n",
@ -71,7 +59,7 @@ static int show_cpuinfo(struct seq_file *m, void *v)
seq_printf(m, "%s ", hwcap_str[i]);
seq_puts(m, "\n");
}
get_online_cpus();
if (cpu_online(n)) {
struct cpuid *id = &per_cpu(cpu_id, n);
seq_printf(m, "processor %li: "
@ -80,7 +68,7 @@ static int show_cpuinfo(struct seq_file *m, void *v)
"machine = %04X\n",
n, id->version, id->ident, id->machine);
}
preempt_enable();
put_online_cpus();
return 0;
}

304
arch/s390/kernel/ptrace.c
View file

@ -1,25 +1,9 @@
/*
* arch/s390/kernel/ptrace.c
* Ptrace user space interface.
*
* S390 version
* Copyright (C) 1999,2000 IBM Deutschland Entwicklung GmbH, IBM Corporation
* Author(s): Denis Joseph Barrow (djbarrow@de.ibm.com,barrow_dj@yahoo.com),
* Copyright IBM Corp. 1999,2010
* Author(s): Denis Joseph Barrow
* Martin Schwidefsky (schwidefsky@de.ibm.com)
*
* Based on PowerPC version
* Copyright (C) 1995-1996 Gary Thomas (gdt@linuxppc.org)
*
* Derived from "arch/m68k/kernel/ptrace.c"
* Copyright (C) 1994 by Hamish Macdonald
* Taken from linux/kernel/ptrace.c and modified for M680x0.
* linux/kernel/ptrace.c is by Ross Biro 1/23/92, edited by Linus Torvalds
*
* Modified by Cort Dougan (cort@cs.nmt.edu)
*
*
* This file is subject to the terms and conditions of the GNU General
* Public License. See the file README.legal in the main directory of
* this archive for more details.
*/
#include <linux/kernel.h>
@ -61,76 +45,58 @@ enum s390_regset {
REGSET_GENERAL_EXTENDED,
};
static void
FixPerRegisters(struct task_struct *task)
void update_per_regs(struct task_struct *task)
{
struct pt_regs *regs;
per_struct *per_info;
per_cr_words cr_words;
static const struct per_regs per_single_step = {
.control = PER_EVENT_IFETCH,
.start = 0,
.end = PSW_ADDR_INSN,
};
struct pt_regs *regs = task_pt_regs(task);
struct thread_struct *thread = &task->thread;
const struct per_regs *new;
struct per_regs old;
regs = task_pt_regs(task);
per_info = (per_struct *) &task->thread.per_info;
per_info->control_regs.bits.em_instruction_fetch =
per_info->single_step | per_info->instruction_fetch;
if (per_info->single_step) {
per_info->control_regs.bits.starting_addr = 0;
#ifdef CONFIG_COMPAT
if (is_compat_task())
per_info->control_regs.bits.ending_addr = 0x7fffffffUL;
else
#endif
per_info->control_regs.bits.ending_addr = PSW_ADDR_INSN;
} else {
per_info->control_regs.bits.starting_addr =
per_info->starting_addr;
per_info->control_regs.bits.ending_addr =
per_info->ending_addr;
}
/*
* if any of the control reg tracing bits are on
* we switch on per in the psw
*/
if (per_info->control_regs.words.cr[0] & PER_EM_MASK)
regs->psw.mask |= PSW_MASK_PER;
else
/* TIF_SINGLE_STEP overrides the user specified PER registers. */
new = test_tsk_thread_flag(task, TIF_SINGLE_STEP) ?
&per_single_step : &thread->per_user;
/* Take care of the PER enablement bit in the PSW. */
if (!(new->control & PER_EVENT_MASK)) {
regs->psw.mask &= ~PSW_MASK_PER;
if (per_info->control_regs.bits.em_storage_alteration)
per_info->control_regs.bits.storage_alt_space_ctl = 1;
else
per_info->control_regs.bits.storage_alt_space_ctl = 0;
if (task == current) {
__ctl_store(cr_words, 9, 11);
if (memcmp(&cr_words, &per_info->control_regs.words,
sizeof(cr_words)) != 0)
__ctl_load(per_info->control_regs.words, 9, 11);
return;
}
regs->psw.mask |= PSW_MASK_PER;
__ctl_store(old, 9, 11);
if (memcmp(new, &old, sizeof(struct per_regs)) != 0)
__ctl_load(*new, 9, 11);
}
void user_enable_single_step(struct task_struct *task)
{
task->thread.per_info.single_step = 1;
FixPerRegisters(task);
set_tsk_thread_flag(task, TIF_SINGLE_STEP);
if (task == current)
update_per_regs(task);
}
void user_disable_single_step(struct task_struct *task)
{
task->thread.per_info.single_step = 0;
FixPerRegisters(task);
clear_tsk_thread_flag(task, TIF_SINGLE_STEP);
if (task == current)
update_per_regs(task);
}
/*
* Called by kernel/ptrace.c when detaching..
*
* Make sure single step bits etc are not set.
* Clear all debugging related fields.
*/
void
ptrace_disable(struct task_struct *child)
void ptrace_disable(struct task_struct *task)
{
/* make sure the single step bit is not set. */
user_disable_single_step(child);
memset(&task->thread.per_user, 0, sizeof(task->thread.per_user));
memset(&task->thread.per_event, 0, sizeof(task->thread.per_event));
clear_tsk_thread_flag(task, TIF_SINGLE_STEP);
clear_tsk_thread_flag(task, TIF_PER_TRAP);
}
#ifndef CONFIG_64BIT
@ -139,6 +105,47 @@ ptrace_disable(struct task_struct *child)
# define __ADDR_MASK 7
#endif
static inline unsigned long __peek_user_per(struct task_struct *child,
addr_t addr)
{
struct per_struct_kernel *dummy = NULL;
if (addr == (addr_t) &dummy->cr9)
/* Control bits of the active per set. */
return test_thread_flag(TIF_SINGLE_STEP) ?
PER_EVENT_IFETCH : child->thread.per_user.control;
else if (addr == (addr_t) &dummy->cr10)
/* Start address of the active per set. */
return test_thread_flag(TIF_SINGLE_STEP) ?
0 : child->thread.per_user.start;
else if (addr == (addr_t) &dummy->cr11)
/* End address of the active per set. */
return test_thread_flag(TIF_SINGLE_STEP) ?
PSW_ADDR_INSN : child->thread.per_user.end;
else if (addr == (addr_t) &dummy->bits)
/* Single-step bit. */
return test_thread_flag(TIF_SINGLE_STEP) ?
(1UL << (BITS_PER_LONG - 1)) : 0;
else if (addr == (addr_t) &dummy->starting_addr)
/* Start address of the user specified per set. */
return child->thread.per_user.start;
else if (addr == (addr_t) &dummy->ending_addr)
/* End address of the user specified per set. */
return child->thread.per_user.end;
else if (addr == (addr_t) &dummy->perc_atmid)
/* PER code, ATMID and AI of the last PER trap */
return (unsigned long)
child->thread.per_event.cause << (BITS_PER_LONG - 16);
else if (addr == (addr_t) &dummy->address)
/* Address of the last PER trap */
return child->thread.per_event.address;
else if (addr == (addr_t) &dummy->access_id)
/* Access id of the last PER trap */
return (unsigned long)
child->thread.per_event.paid << (BITS_PER_LONG - 8);
return 0;
}
/*
* Read the word at offset addr from the user area of a process. The
* trouble here is that the information is littered over different
@ -204,10 +211,10 @@ static unsigned long __peek_user(struct task_struct *child, addr_t addr)
} else if (addr < (addr_t) (&dummy->regs.per_info + 1)) {
/*
* per_info is found in the thread structure
* Handle access to the per_info structure.
*/
offset = addr - (addr_t) &dummy->regs.per_info;
tmp = *(addr_t *)((addr_t) &child->thread.per_info + offset);
addr -= (addr_t) &dummy->regs.per_info;
tmp = __peek_user_per(child, addr);
} else
tmp = 0;
@ -237,6 +244,35 @@ peek_user(struct task_struct *child, addr_t addr, addr_t data)
return put_user(tmp, (addr_t __user *) data);
}
static inline void __poke_user_per(struct task_struct *child,
addr_t addr, addr_t data)
{
struct per_struct_kernel *dummy = NULL;
/*
* There are only three fields in the per_info struct that the
* debugger user can write to.
* 1) cr9: the debugger wants to set a new PER event mask
* 2) starting_addr: the debugger wants to set a new starting
* address to use with the PER event mask.
* 3) ending_addr: the debugger wants to set a new ending
* address to use with the PER event mask.
* The user specified PER event mask and the start and end
* addresses are used only if single stepping is not in effect.
* Writes to any other field in per_info are ignored.
*/
if (addr == (addr_t) &dummy->cr9)
/* PER event mask of the user specified per set. */
child->thread.per_user.control =
data & (PER_EVENT_MASK | PER_CONTROL_MASK);
else if (addr == (addr_t) &dummy->starting_addr)
/* Starting address of the user specified per set. */
child->thread.per_user.start = data;
else if (addr == (addr_t) &dummy->ending_addr)
/* Ending address of the user specified per set. */
child->thread.per_user.end = data;
}
/*
* Write a word to the user area of a process at location addr. This
* operation does have an additional problem compared to peek_user.
@ -311,19 +347,17 @@ static int __poke_user(struct task_struct *child, addr_t addr, addr_t data)
} else if (addr < (addr_t) (&dummy->regs.per_info + 1)) {
/*
* per_info is found in the thread structure
* Handle access to the per_info structure.
*/
offset = addr - (addr_t) &dummy->regs.per_info;
*(addr_t *)((addr_t) &child->thread.per_info + offset) = data;
addr -= (addr_t) &dummy->regs.per_info;
__poke_user_per(child, addr, data);
}
FixPerRegisters(child);
return 0;
}
static int
poke_user(struct task_struct *child, addr_t addr, addr_t data)
static int poke_user(struct task_struct *child, addr_t addr, addr_t data)
{
addr_t mask;
@ -409,13 +443,54 @@ long arch_ptrace(struct task_struct *child, long request,
* a 64 bit program is a no-no.
*/
/*
* Same as peek_user_per but for a 31 bit program.
*/
static inline __u32 __peek_user_per_compat(struct task_struct *child,
addr_t addr)
{
struct compat_per_struct_kernel *dummy32 = NULL;
if (addr == (addr_t) &dummy32->cr9)
/* Control bits of the active per set. */
return (__u32) test_thread_flag(TIF_SINGLE_STEP) ?
PER_EVENT_IFETCH : child->thread.per_user.control;
else if (addr == (addr_t) &dummy32->cr10)
/* Start address of the active per set. */
return (__u32) test_thread_flag(TIF_SINGLE_STEP) ?
0 : child->thread.per_user.start;
else if (addr == (addr_t) &dummy32->cr11)
/* End address of the active per set. */
return test_thread_flag(TIF_SINGLE_STEP) ?
PSW32_ADDR_INSN : child->thread.per_user.end;
else if (addr == (addr_t) &dummy32->bits)
/* Single-step bit. */
return (__u32) test_thread_flag(TIF_SINGLE_STEP) ?
0x80000000 : 0;
else if (addr == (addr_t) &dummy32->starting_addr)
/* Start address of the user specified per set. */
return (__u32) child->thread.per_user.start;
else if (addr == (addr_t) &dummy32->ending_addr)
/* End address of the user specified per set. */
return (__u32) child->thread.per_user.end;
else if (addr == (addr_t) &dummy32->perc_atmid)
/* PER code, ATMID and AI of the last PER trap */
return (__u32) child->thread.per_event.cause << 16;
else if (addr == (addr_t) &dummy32->address)
/* Address of the last PER trap */
return (__u32) child->thread.per_event.address;
else if (addr == (addr_t) &dummy32->access_id)
/* Access id of the last PER trap */
return (__u32) child->thread.per_event.paid << 24;
return 0;
}
/*
* Same as peek_user but for a 31 bit program.
*/
static u32 __peek_user_compat(struct task_struct *child, addr_t addr)
{
struct user32 *dummy32 = NULL;
per_struct32 *dummy_per32 = NULL;
struct compat_user *dummy32 = NULL;
addr_t offset;
__u32 tmp;
@ -465,19 +540,10 @@ static u32 __peek_user_compat(struct task_struct *child, addr_t addr)
} else if (addr < (addr_t) (&dummy32->regs.per_info + 1)) {
/*
* per_info is found in the thread structure
* Handle access to the per_info structure.
*/
offset = addr - (addr_t) &dummy32->regs.per_info;
/* This is magic. See per_struct and per_struct32. */
if ((offset >= (addr_t) &dummy_per32->control_regs &&
offset < (addr_t) (&dummy_per32->control_regs + 1)) ||
(offset >= (addr_t) &dummy_per32->starting_addr &&
offset <= (addr_t) &dummy_per32->ending_addr) ||
offset == (addr_t) &dummy_per32->lowcore.words.address)
offset = offset*2 + 4;
else
offset = offset*2;
tmp = *(__u32 *)((addr_t) &child->thread.per_info + offset);
addr -= (addr_t) &dummy32->regs.per_info;
tmp = __peek_user_per_compat(child, addr);
} else
tmp = 0;
@ -497,14 +563,33 @@ static int peek_user_compat(struct task_struct *child,
return put_user(tmp, (__u32 __user *) data);
}
/*
* Same as poke_user_per but for a 31 bit program.
*/
static inline void __poke_user_per_compat(struct task_struct *child,
addr_t addr, __u32 data)
{
struct compat_per_struct_kernel *dummy32 = NULL;
if (addr == (addr_t) &dummy32->cr9)
/* PER event mask of the user specified per set. */
child->thread.per_user.control =
data & (PER_EVENT_MASK | PER_CONTROL_MASK);
else if (addr == (addr_t) &dummy32->starting_addr)
/* Starting address of the user specified per set. */
child->thread.per_user.start = data;
else if (addr == (addr_t) &dummy32->ending_addr)
/* Ending address of the user specified per set. */
child->thread.per_user.end = data;
}
/*
* Same as poke_user but for a 31 bit program.
*/
static int __poke_user_compat(struct task_struct *child,
addr_t addr, addr_t data)
{
struct user32 *dummy32 = NULL;
per_struct32 *dummy_per32 = NULL;
struct compat_user *dummy32 = NULL;
__u32 tmp = (__u32) data;
addr_t offset;
@ -561,37 +646,20 @@ static int __poke_user_compat(struct task_struct *child,
} else if (addr < (addr_t) (&dummy32->regs.per_info + 1)) {
/*
* per_info is found in the thread structure.
* Handle access to the per_info structure.
*/
offset = addr - (addr_t) &dummy32->regs.per_info;
/*
* This is magic. See per_struct and per_struct32.
* By incident the offsets in per_struct are exactly
* twice the offsets in per_struct32 for all fields.
* The 8 byte fields need special handling though,
* because the second half (bytes 4-7) is needed and
* not the first half.
*/
if ((offset >= (addr_t) &dummy_per32->control_regs &&
offset < (addr_t) (&dummy_per32->control_regs + 1)) ||
(offset >= (addr_t) &dummy_per32->starting_addr &&
offset <= (addr_t) &dummy_per32->ending_addr) ||
offset == (addr_t) &dummy_per32->lowcore.words.address)
offset = offset*2 + 4;
else
offset = offset*2;
*(__u32 *)((addr_t) &child->thread.per_info + offset) = tmp;
addr -= (addr_t) &dummy32->regs.per_info;
__poke_user_per_compat(child, addr, data);
}
FixPerRegisters(child);
return 0;
}
static int poke_user_compat(struct task_struct *child,
addr_t addr, addr_t data)
{
if (!is_compat_task() || (addr & 3) || addr > sizeof(struct user32) - 3)
if (!is_compat_task() || (addr & 3) ||
addr > sizeof(struct compat_user) - 3)
return -EIO;
return __poke_user_compat(child, addr, data);
@ -602,7 +670,7 @@ long compat_arch_ptrace(struct task_struct *child, compat_long_t request,
{
unsigned long addr = caddr;
unsigned long data = cdata;
ptrace_area_emu31 parea;
compat_ptrace_area parea;
int copied, ret;
switch (request) {

129
arch/s390/kernel/s390_ext.c
View file

@ -1,33 +1,36 @@
/*
* arch/s390/kernel/s390_ext.c
*
* S390 version
* Copyright (C) 1999,2000 IBM Deutschland Entwicklung GmbH, IBM Corporation
* Author(s): Holger Smolinski (Holger.Smolinski@de.ibm.com),
* Martin Schwidefsky (schwidefsky@de.ibm.com)
* Copyright IBM Corp. 1999,2010
* Author(s): Holger Smolinski <Holger.Smolinski@de.ibm.com>,
* Martin Schwidefsky <schwidefsky@de.ibm.com>,
*/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/ftrace.h>
#include <linux/errno.h>
#include <linux/kernel_stat.h>
#include <linux/interrupt.h>
#include <asm/cputime.h>
#include <asm/lowcore.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/ftrace.h>
#include <linux/errno.h>
#include <linux/slab.h>
#include <asm/s390_ext.h>
#include <asm/irq_regs.h>
#include <asm/cputime.h>
#include <asm/lowcore.h>
#include <asm/irq.h>
#include "entry.h"
struct ext_int_info {
struct ext_int_info *next;
ext_int_handler_t handler;
__u16 code;
};
/*
* ext_int_hash[index] is the start of the list for all external interrupts
* that hash to this index. With the current set of external interrupts
* (0x1202 external call, 0x1004 cpu timer, 0x2401 hwc console, 0x4000
* iucv and 0x2603 pfault) this is always the first element.
*/
ext_int_info_t *ext_int_hash[256] = { NULL, };
static struct ext_int_info *ext_int_hash[256];
static inline int ext_hash(__u16 code)
{
@ -36,90 +39,53 @@ static inline int ext_hash(__u16 code)
int register_external_interrupt(__u16 code, ext_int_handler_t handler)
{
ext_int_info_t *p;
int index;
struct ext_int_info *p;
int index;
p = kmalloc(sizeof(ext_int_info_t), GFP_ATOMIC);
if (p == NULL)
return -ENOMEM;
p->code = code;
p->handler = handler;
p = kmalloc(sizeof(*p), GFP_ATOMIC);
if (!p)
return -ENOMEM;
p->code = code;
p->handler = handler;
index = ext_hash(code);
p->next = ext_int_hash[index];
ext_int_hash[index] = p;
return 0;
}
int register_early_external_interrupt(__u16 code, ext_int_handler_t handler,
ext_int_info_t *p)
{
int index;
if (p == NULL)
return -EINVAL;
p->code = code;
p->handler = handler;
index = ext_hash(code);
p->next = ext_int_hash[index];
ext_int_hash[index] = p;
return 0;
p->next = ext_int_hash[index];
ext_int_hash[index] = p;
return 0;
}
EXPORT_SYMBOL(register_external_interrupt);
int unregister_external_interrupt(__u16 code, ext_int_handler_t handler)
{
ext_int_info_t *p, *q;
int index;
index = ext_hash(code);
q = NULL;
p = ext_int_hash[index];
while (p != NULL) {
if (p->code == code && p->handler == handler)
break;
q = p;
p = p->next;
}
if (p == NULL)
return -ENOENT;
if (q != NULL)
q->next = p->next;
else
ext_int_hash[index] = p->next;
kfree(p);
return 0;
}
int unregister_early_external_interrupt(__u16 code, ext_int_handler_t handler,
ext_int_info_t *p)
{
ext_int_info_t *q;
struct ext_int_info *p, *q;
int index;
if (p == NULL || p->code != code || p->handler != handler)
return -EINVAL;
index = ext_hash(code);
q = ext_int_hash[index];
if (p != q) {
while (q != NULL) {
if (q->next == p)
break;
q = q->next;
}
if (q == NULL)
return -ENOENT;
q = NULL;
p = ext_int_hash[index];
while (p) {
if (p->code == code && p->handler == handler)
break;
q = p;
p = p->next;
}
if (!p)
return -ENOENT;
if (q)
q->next = p->next;
} else
else
ext_int_hash[index] = p->next;
kfree(p);
return 0;
}
EXPORT_SYMBOL(unregister_external_interrupt);
void __irq_entry do_extint(struct pt_regs *regs, unsigned int ext_int_code,
unsigned int param32, unsigned long param64)
{
struct pt_regs *old_regs;
unsigned short code;
ext_int_info_t *p;
int index;
struct ext_int_info *p;
int index;
code = (unsigned short) ext_int_code;
old_regs = set_irq_regs(regs);
@ -132,7 +98,7 @@ void __irq_entry do_extint(struct pt_regs *regs, unsigned int ext_int_code,
kstat_cpu(smp_processor_id()).irqs[EXTERNAL_INTERRUPT]++;
if (code != 0x1004)
__get_cpu_var(s390_idle).nohz_delay = 1;
index = ext_hash(code);
index = ext_hash(code);
for (p = ext_int_hash[index]; p; p = p->next) {
if (likely(p->code == code))
p->handler(ext_int_code, param32, param64);
@ -140,6 +106,3 @@ void __irq_entry do_extint(struct pt_regs *regs, unsigned int ext_int_code,
irq_exit();
set_irq_regs(old_regs);
}
EXPORT_SYMBOL(register_external_interrupt);
EXPORT_SYMBOL(unregister_external_interrupt);

2
arch/s390/kernel/signal.c
View file

@ -505,7 +505,7 @@ void do_signal(struct pt_regs *regs)
* Let tracing know that we've done the handler setup.
*/
tracehook_signal_handler(signr, &info, &ka, regs,
current->thread.per_info.single_step);
test_thread_flag(TIF_SINGLE_STEP));
}
return;
}

49
arch/s390/kernel/smp.c
View file

@ -23,6 +23,7 @@
#define KMSG_COMPONENT "cpu"
#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
#include <linux/workqueue.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/mm.h>
@ -161,6 +162,7 @@ static void do_ext_call_interrupt(unsigned int ext_int_code,
{
unsigned long bits;
kstat_cpu(smp_processor_id()).irqs[EXTINT_IPI]++;
/*
* handle bit signal external calls
*
@ -469,25 +471,25 @@ int __cpuinit start_secondary(void *cpuvoid)
ipi_call_unlock();
/* Switch on interrupts */
local_irq_enable();
/* Print info about this processor */
print_cpu_info();
/* cpu_idle will call schedule for us */
cpu_idle();
return 0;
}
static void __init smp_create_idle(unsigned int cpu)
{
struct task_struct *p;
struct create_idle {
struct work_struct work;
struct task_struct *idle;
struct completion done;
int cpu;
};
/*
* don't care about the psw and regs settings since we'll never
* reschedule the forked task.
*/
p = fork_idle(cpu);
if (IS_ERR(p))
panic("failed fork for CPU %u: %li", cpu, PTR_ERR(p));
current_set[cpu] = p;
static void __cpuinit smp_fork_idle(struct work_struct *work)
{
struct create_idle *c_idle;
c_idle = container_of(work, struct create_idle, work);
c_idle->idle = fork_idle(c_idle->cpu);
complete(&c_idle->done);
}
static int __cpuinit smp_alloc_lowcore(int cpu)
@ -551,6 +553,7 @@ static void smp_free_lowcore(int cpu)
int __cpuinit __cpu_up(unsigned int cpu)
{
struct _lowcore *cpu_lowcore;
struct create_idle c_idle;
struct task_struct *idle;
struct stack_frame *sf;
u32 lowcore;
@ -558,6 +561,19 @@ int __cpuinit __cpu_up(unsigned int cpu)
if (smp_cpu_state[cpu] != CPU_STATE_CONFIGURED)
return -EIO;
idle = current_set[cpu];
if (!idle) {
c_idle.done = COMPLETION_INITIALIZER_ONSTACK(c_idle.done);
INIT_WORK_ONSTACK(&c_idle.work, smp_fork_idle);
c_idle.cpu = cpu;
schedule_work(&c_idle.work);
wait_for_completion(&c_idle.done);
if (IS_ERR(c_idle.idle))
return PTR_ERR(c_idle.idle);
idle = c_idle.idle;
current_set[cpu] = c_idle.idle;
}
init_idle(idle, cpu);
if (smp_alloc_lowcore(cpu))
return -ENOMEM;
do {
@ -572,7 +588,6 @@ int __cpuinit __cpu_up(unsigned int cpu)
while (sigp_p(lowcore, cpu, sigp_set_prefix) == sigp_busy)
udelay(10);
idle = current_set[cpu];
cpu_lowcore = lowcore_ptr[cpu];
cpu_lowcore->kernel_stack = (unsigned long)
task_stack_page(idle) + THREAD_SIZE;
@ -664,7 +679,6 @@ void __cpu_die(unsigned int cpu)
udelay(10);
smp_free_lowcore(cpu);
atomic_dec(&init_mm.context.attach_count);
pr_info("Processor %d stopped\n", cpu);
}
void cpu_die(void)
@ -684,14 +698,12 @@ void __init smp_prepare_cpus(unsigned int max_cpus)
#endif
unsigned long async_stack, panic_stack;
struct _lowcore *lowcore;
unsigned int cpu;
smp_detect_cpus();
/* request the 0x1201 emergency signal external interrupt */
if (register_external_interrupt(0x1201, do_ext_call_interrupt) != 0)
panic("Couldn't request external interrupt 0x1201");
print_cpu_info();
/* Reallocate current lowcore, but keep its contents. */
lowcore = (void *) __get_free_pages(GFP_KERNEL | GFP_DMA, LC_ORDER);
@ -719,9 +731,6 @@ void __init smp_prepare_cpus(unsigned int max_cpus)
if (vdso_alloc_per_cpu(smp_processor_id(), &S390_lowcore))
BUG();
#endif
for_each_possible_cpu(cpu)
if (cpu != smp_processor_id())
smp_create_idle(cpu);
}
void __init smp_prepare_boot_cpu(void)

6
arch/s390/kernel/time.c
View file

@ -15,6 +15,7 @@
#define KMSG_COMPONENT "time"
#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
#include <linux/kernel_stat.h>
#include <linux/errno.h>
#include <linux/module.h>
#include <linux/sched.h>
@ -37,6 +38,7 @@
#include <linux/clocksource.h>
#include <linux/clockchips.h>
#include <linux/gfp.h>
#include <linux/kprobes.h>
#include <asm/uaccess.h>
#include <asm/delay.h>
#include <asm/s390_ext.h>
@ -60,7 +62,7 @@ static DEFINE_PER_CPU(struct clock_event_device, comparators);
/*
* Scheduler clock - returns current time in nanosec units.
*/
unsigned long long notrace sched_clock(void)
unsigned long long notrace __kprobes sched_clock(void)
{
return (get_clock_monotonic() * 125) >> 9;
}
@ -159,6 +161,7 @@ static void clock_comparator_interrupt(unsigned int ext_int_code,
unsigned int param32,
unsigned long param64)
{
kstat_cpu(smp_processor_id()).irqs[EXTINT_CLK]++;
if (S390_lowcore.clock_comparator == -1ULL)
set_clock_comparator(S390_lowcore.clock_comparator);
}
@ -169,6 +172,7 @@ static void stp_timing_alert(struct stp_irq_parm *);
static void timing_alert_interrupt(unsigned int ext_int_code,
unsigned int param32, unsigned long param64)
{
kstat_cpu(smp_processor_id()).irqs[EXTINT_TLA]++;
if (param32 & 0x00c40000)
etr_timing_alert((struct etr_irq_parm *) &param32);
if (param32 & 0x00038000)

15
arch/s390/kernel/traps.c
View file

@ -365,12 +365,10 @@ static inline void __user *get_psw_address(struct pt_regs *regs,
((regs->psw.addr - (pgm_int_code >> 16)) & PSW_ADDR_INSN);
}
void __kprobes do_single_step(struct pt_regs *regs)
void __kprobes do_per_trap(struct pt_regs *regs)
{
if (notify_die(DIE_SSTEP, "sstep", regs, 0, 0,
SIGTRAP) == NOTIFY_STOP){
if (notify_die(DIE_SSTEP, "sstep", regs, 0, 0, SIGTRAP) == NOTIFY_STOP)
return;
}
if (tracehook_consider_fatal_signal(current, SIGTRAP))
force_sig(SIGTRAP, current);
}
@ -451,8 +449,8 @@ static inline void do_fp_trap(struct pt_regs *regs, void __user *location,
"floating point exception", regs, &si);
}
static void illegal_op(struct pt_regs *regs, long pgm_int_code,
unsigned long trans_exc_code)
static void __kprobes illegal_op(struct pt_regs *regs, long pgm_int_code,
unsigned long trans_exc_code)
{
siginfo_t info;
__u8 opcode[6];
@ -688,7 +686,7 @@ static void space_switch_exception(struct pt_regs *regs, long pgm_int_code,
do_trap(pgm_int_code, SIGILL, "space switch event", regs, &info);
}
asmlinkage void kernel_stack_overflow(struct pt_regs * regs)
asmlinkage void __kprobes kernel_stack_overflow(struct pt_regs * regs)
{
bust_spinlocks(1);
printk("Kernel stack overflow.\n");
@ -733,5 +731,6 @@ void __init trap_init(void)
pgm_check_table[0x15] = &operand_exception;
pgm_check_table[0x1C] = &space_switch_exception;
pgm_check_table[0x1D] = &hfp_sqrt_exception;
pfault_irq_init();
/* Enable machine checks early. */
local_mcck_enable();
}

6
arch/s390/kernel/vtime.c
View file

@ -20,6 +20,7 @@
#include <linux/rcupdate.h>
#include <linux/posix-timers.h>
#include <linux/cpu.h>
#include <linux/kprobes.h>
#include <asm/s390_ext.h>
#include <asm/timer.h>
@ -122,7 +123,7 @@ void account_system_vtime(struct task_struct *tsk)
}
EXPORT_SYMBOL_GPL(account_system_vtime);
void vtime_start_cpu(__u64 int_clock, __u64 enter_timer)
void __kprobes vtime_start_cpu(__u64 int_clock, __u64 enter_timer)
{
struct s390_idle_data *idle = &__get_cpu_var(s390_idle);
struct vtimer_queue *vq = &__get_cpu_var(virt_cpu_timer);
@ -162,7 +163,7 @@ void vtime_start_cpu(__u64 int_clock, __u64 enter_timer)
idle->sequence++;
}
void vtime_stop_cpu(void)
void __kprobes vtime_stop_cpu(void)
{
struct s390_idle_data *idle = &__get_cpu_var(s390_idle);
struct vtimer_queue *vq = &__get_cpu_var(virt_cpu_timer);
@ -323,6 +324,7 @@ static void do_cpu_timer_interrupt(unsigned int ext_int_code,
struct list_head cb_list; /* the callback queue */
__u64 elapsed, next;
kstat_cpu(smp_processor_id()).irqs[EXTINT_TMR]++;
INIT_LIST_HEAD(&cb_list);
vq = &__get_cpu_var(virt_cpu_timer);

7
arch/s390/kvm/Kconfig
View file

@ -4,8 +4,8 @@
source "virt/kvm/Kconfig"
menuconfig VIRTUALIZATION
bool "Virtualization"
default y
def_bool y
prompt "Virtualization"
---help---
Say Y here to get to see options for using your Linux host to run other
operating systems inside virtual machines (guests).
@ -16,7 +16,8 @@ menuconfig VIRTUALIZATION
if VIRTUALIZATION
config KVM
tristate "Kernel-based Virtual Machine (KVM) support"
def_tristate y
prompt "Kernel-based Virtual Machine (KVM) support"
depends on HAVE_KVM && EXPERIMENTAL
select PREEMPT_NOTIFIERS
select ANON_INODES

2
arch/s390/lib/delay.c
View file

@ -47,7 +47,6 @@ static void __udelay_disabled(unsigned long long usecs)
lockdep_on();
__ctl_load(cr0_saved, 0, 0);
local_tick_enable(clock_saved);
set_clock_comparator(S390_lowcore.clock_comparator);
}
static void __udelay_enabled(unsigned long long usecs)
@ -70,7 +69,6 @@ static void __udelay_enabled(unsigned long long usecs)
if (clock_saved)
local_tick_enable(clock_saved);
} while (get_clock() < end);
set_clock_comparator(S390_lowcore.clock_comparator);
}
/*

35
arch/s390/mm/fault.c
View file

@ -10,6 +10,7 @@
* Copyright (C) 1995 Linus Torvalds
*/
#include <linux/kernel_stat.h>
#include <linux/perf_event.h>
#include <linux/signal.h>
#include <linux/sched.h>
@ -234,13 +235,13 @@ static noinline int signal_return(struct pt_regs *regs, long int_code,
rc = __get_user(instruction, (u16 __user *) regs->psw.addr);
if (!rc && instruction == 0x0a77) {
clear_tsk_thread_flag(current, TIF_SINGLE_STEP);
clear_tsk_thread_flag(current, TIF_PER_TRAP);
if (is_compat_task())
sys32_sigreturn();
else
sys_sigreturn();
} else if (!rc && instruction == 0x0aad) {
clear_tsk_thread_flag(current, TIF_SINGLE_STEP);
clear_tsk_thread_flag(current, TIF_PER_TRAP);
if (is_compat_task())
sys32_rt_sigreturn();
else
@ -378,7 +379,7 @@ static inline int do_exception(struct pt_regs *regs, int access,
* The instruction that caused the program check will
* be repeated. Don't signal single step via SIGTRAP.
*/
clear_tsk_thread_flag(tsk, TIF_SINGLE_STEP);
clear_tsk_thread_flag(tsk, TIF_PER_TRAP);
fault = 0;
out_up:
up_read(&mm->mmap_sem);
@ -480,8 +481,7 @@ int __handle_fault(unsigned long uaddr, unsigned long pgm_int_code, int write)
/*
* 'pfault' pseudo page faults routines.
*/
static ext_int_info_t ext_int_pfault;
static int pfault_disable = 0;
static int pfault_disable;
static int __init nopfault(char *str)
{
@ -543,6 +543,7 @@ static void pfault_interrupt(unsigned int ext_int_code,
struct task_struct *tsk;
__u16 subcode;
kstat_cpu(smp_processor_id()).irqs[EXTINT_PFL]++;
/*
* Get the external interruption subcode & pfault
* initial/completion signal bit. VM stores this
@ -592,24 +593,28 @@ static void pfault_interrupt(unsigned int ext_int_code,
}
}
void __init pfault_irq_init(void)
static int __init pfault_irq_init(void)
{
if (!MACHINE_IS_VM)
return;
int rc;
if (!MACHINE_IS_VM)
return 0;
/*
* Try to get pfault pseudo page faults going.
*/
if (register_early_external_interrupt(0x2603, pfault_interrupt,
&ext_int_pfault) != 0)
panic("Couldn't request external interrupt 0x2603");
rc = register_external_interrupt(0x2603, pfault_interrupt);
if (rc) {
pfault_disable = 1;
return rc;
}
if (pfault_init() == 0)
return;
return 0;
/* Tough luck, no pfault. */
pfault_disable = 1;
unregister_early_external_interrupt(0x2603, pfault_interrupt,
&ext_int_pfault);
unregister_external_interrupt(0x2603, pfault_interrupt);
return 0;
}
early_initcall(pfault_irq_init);
#endif

24
drivers/s390/block/Kconfig
View file

@ -2,7 +2,8 @@ comment "S/390 block device drivers"
depends on S390 && BLOCK
config BLK_DEV_XPRAM
tristate "XPRAM disk support"
def_tristate m
prompt "XPRAM disk support"
depends on S390 && BLOCK
help
Select this option if you want to use your expanded storage on S/390
@ -12,13 +13,15 @@ config BLK_DEV_XPRAM
xpram. If unsure, say "N".
config DCSSBLK
tristate "DCSSBLK support"
def_tristate m
prompt "DCSSBLK support"
depends on S390 && BLOCK
help
Support for dcss block device
config DASD
tristate "Support for DASD devices"
def_tristate y
prompt "Support for DASD devices"
depends on CCW && BLOCK
select IOSCHED_DEADLINE
help
@ -27,28 +30,32 @@ config DASD
natively on a single image or an LPAR.
config DASD_PROFILE
bool "Profiling support for dasd devices"
def_bool y
prompt "Profiling support for dasd devices"
depends on DASD
help
Enable this option if you want to see profiling information
in /proc/dasd/statistics.
config DASD_ECKD
tristate "Support for ECKD Disks"
def_tristate y
prompt "Support for ECKD Disks"
depends on DASD
help
ECKD devices are the most commonly used devices. You should enable
this option unless you are very sure to have no ECKD device.
config DASD_FBA
tristate "Support for FBA Disks"
def_tristate y
prompt "Support for FBA Disks"
depends on DASD
help
Select this option to be able to access FBA devices. It is safe to
say "Y".
config DASD_DIAG
tristate "Support for DIAG access to Disks"
def_tristate y
prompt "Support for DIAG access to Disks"
depends on DASD
help
Select this option if you want to use Diagnose250 command to access
@ -56,7 +63,8 @@ config DASD_DIAG
say "N".
config DASD_EER
bool "Extended error reporting (EER)"
def_bool y
prompt "Extended error reporting (EER)"
depends on DASD
help
This driver provides a character device interface to the

314
drivers/s390/block/dasd.c
View file

@ -11,6 +11,7 @@
#define KMSG_COMPONENT "dasd"
#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
#include <linux/kernel_stat.h>
#include <linux/kmod.h>
#include <linux/init.h>
#include <linux/interrupt.h>
@ -368,6 +369,11 @@ dasd_state_ready_to_online(struct dasd_device * device)
device->state = DASD_STATE_ONLINE;
if (device->block) {
dasd_schedule_block_bh(device->block);
if ((device->features & DASD_FEATURE_USERAW)) {
disk = device->block->gdp;
kobject_uevent(&disk_to_dev(disk)->kobj, KOBJ_CHANGE);
return 0;
}
disk = device->block->bdev->bd_disk;
disk_part_iter_init(&piter, disk, DISK_PITER_INCL_PART0);
while ((part = disk_part_iter_next(&piter)))
@ -393,7 +399,7 @@ static int dasd_state_online_to_ready(struct dasd_device *device)
return rc;
}
device->state = DASD_STATE_READY;
if (device->block) {
if (device->block && !(device->features & DASD_FEATURE_USERAW)) {
disk = device->block->bdev->bd_disk;
disk_part_iter_init(&piter, disk, DISK_PITER_INCL_PART0);
while ((part = disk_part_iter_next(&piter)))
@ -744,10 +750,6 @@ struct dasd_ccw_req *dasd_smalloc_request(int magic, int cplength,
char *data;
int size;
/* Sanity checks */
BUG_ON(datasize > PAGE_SIZE ||
(cplength*sizeof(struct ccw1)) > PAGE_SIZE);
size = (sizeof(struct dasd_ccw_req) + 7L) & -8L;
if (cplength > 0)
size += cplength * sizeof(struct ccw1);
@ -853,7 +855,6 @@ int dasd_term_IO(struct dasd_ccw_req *cqr)
rc = ccw_device_clear(device->cdev, (long) cqr);
switch (rc) {
case 0: /* termination successful */
cqr->retries--;
cqr->status = DASD_CQR_CLEAR_PENDING;
cqr->stopclk = get_clock();
cqr->starttime = 0;
@ -905,6 +906,16 @@ int dasd_start_IO(struct dasd_ccw_req *cqr)
return rc;
}
device = (struct dasd_device *) cqr->startdev;
if (((cqr->block &&
test_bit(DASD_FLAG_LOCK_STOLEN, &cqr->block->base->flags)) ||
test_bit(DASD_FLAG_LOCK_STOLEN, &device->flags)) &&
!test_bit(DASD_CQR_ALLOW_SLOCK, &cqr->flags)) {
DBF_DEV_EVENT(DBF_DEBUG, device, "start_IO: return request %p "
"because of stolen lock", cqr);
cqr->status = DASD_CQR_ERROR;
cqr->intrc = -EPERM;
return -EPERM;
}
if (cqr->retries < 0) {
/* internal error 14 - start_IO run out of retries */
sprintf(errorstring, "14 %p", cqr);
@ -916,6 +927,11 @@ int dasd_start_IO(struct dasd_ccw_req *cqr)
cqr->startclk = get_clock();
cqr->starttime = jiffies;
cqr->retries--;
if (!test_bit(DASD_CQR_VERIFY_PATH, &cqr->flags)) {
cqr->lpm &= device->path_data.opm;
if (!cqr->lpm)
cqr->lpm = device->path_data.opm;
}
if (cqr->cpmode == 1) {
rc = ccw_device_tm_start(device->cdev, cqr->cpaddr,
(long) cqr, cqr->lpm);
@ -928,35 +944,53 @@ int dasd_start_IO(struct dasd_ccw_req *cqr)
cqr->status = DASD_CQR_IN_IO;
break;
case -EBUSY:
DBF_DEV_EVENT(DBF_DEBUG, device, "%s",
DBF_DEV_EVENT(DBF_WARNING, device, "%s",
"start_IO: device busy, retry later");
break;
case -ETIMEDOUT:
DBF_DEV_EVENT(DBF_DEBUG, device, "%s",
DBF_DEV_EVENT(DBF_WARNING, device, "%s",
"start_IO: request timeout, retry later");
break;
case -EACCES:
/* -EACCES indicates that the request used only a
* subset of the available pathes and all these
* pathes are gone.
* Do a retry with all available pathes.
/* -EACCES indicates that the request used only a subset of the
* available paths and all these paths are gone. If the lpm of
* this request was only a subset of the opm (e.g. the ppm) then
* we just do a retry with all available paths.
* If we already use the full opm, something is amiss, and we
* need a full path verification.
*/
cqr->lpm = LPM_ANYPATH;
DBF_DEV_EVENT(DBF_DEBUG, device, "%s",
"start_IO: selected pathes gone,"
" retry on all pathes");
if (test_bit(DASD_CQR_VERIFY_PATH, &cqr->flags)) {
DBF_DEV_EVENT(DBF_WARNING, device,
"start_IO: selected paths gone (%x)",
cqr->lpm);
} else if (cqr->lpm != device->path_data.opm) {
cqr->lpm = device->path_data.opm;
DBF_DEV_EVENT(DBF_DEBUG, device, "%s",
"start_IO: selected paths gone,"
" retry on all paths");
} else {
DBF_DEV_EVENT(DBF_WARNING, device, "%s",
"start_IO: all paths in opm gone,"
" do path verification");
dasd_generic_last_path_gone(device);
device->path_data.opm = 0;
device->path_data.ppm = 0;
device->path_data.npm = 0;
device->path_data.tbvpm =
ccw_device_get_path_mask(device->cdev);
}
break;
case -ENODEV:
DBF_DEV_EVENT(DBF_DEBUG, device, "%s",
DBF_DEV_EVENT(DBF_WARNING, device, "%s",
"start_IO: -ENODEV device gone, retry");
break;
case -EIO:
DBF_DEV_EVENT(DBF_DEBUG, device, "%s",
DBF_DEV_EVENT(DBF_WARNING, device, "%s",
"start_IO: -EIO device gone, retry");
break;
case -EINVAL:
/* most likely caused in power management context */
DBF_DEV_EVENT(DBF_DEBUG, device, "%s",
DBF_DEV_EVENT(DBF_WARNING, device, "%s",
"start_IO: -EINVAL device currently "
"not accessible");
break;
@ -1076,6 +1110,7 @@ void dasd_int_handler(struct ccw_device *cdev, unsigned long intparm,
unsigned long long now;
int expires;
kstat_cpu(smp_processor_id()).irqs[IOINT_DAS]++;
if (IS_ERR(irb)) {
switch (PTR_ERR(irb)) {
case -EIO:
@ -1094,16 +1129,11 @@ void dasd_int_handler(struct ccw_device *cdev, unsigned long intparm,
}
now = get_clock();
/* check for unsolicited interrupts */
cqr = (struct dasd_ccw_req *) intparm;
if (!cqr || ((scsw_cc(&irb->scsw) == 1) &&
(scsw_fctl(&irb->scsw) & SCSW_FCTL_START_FUNC) &&
((scsw_stctl(&irb->scsw) == SCSW_STCTL_STATUS_PEND) ||
(scsw_stctl(&irb->scsw) == (SCSW_STCTL_STATUS_PEND |
SCSW_STCTL_ALERT_STATUS))))) {
if (cqr && cqr->status == DASD_CQR_IN_IO)
cqr->status = DASD_CQR_QUEUED;
/* check for conditions that should be handled immediately */
if (!cqr ||
!(scsw_dstat(&irb->scsw) == (DEV_STAT_CHN_END | DEV_STAT_DEV_END) &&
scsw_cstat(&irb->scsw) == 0)) {
if (cqr)
memcpy(&cqr->irb, irb, sizeof(*irb));
device = dasd_device_from_cdev_locked(cdev);
@ -1114,17 +1144,14 @@ void dasd_int_handler(struct ccw_device *cdev, unsigned long intparm,
dasd_put_device(device);
return;
}
device->discipline->dump_sense_dbf(device, irb,
"unsolicited");
if ((device->features & DASD_FEATURE_ERPLOG))
device->discipline->dump_sense(device, cqr,
irb);
dasd_device_clear_timer(device);
device->discipline->handle_unsolicited_interrupt(device,
irb);
device->discipline->dump_sense_dbf(device, irb, "int");
if (device->features & DASD_FEATURE_ERPLOG)
device->discipline->dump_sense(device, cqr, irb);
device->discipline->check_for_device_change(device, cqr, irb);
dasd_put_device(device);
return;
}
if (!cqr)
return;
device = (struct dasd_device *) cqr->startdev;
if (!device ||
@ -1164,25 +1191,19 @@ void dasd_int_handler(struct ccw_device *cdev, unsigned long intparm,
struct dasd_ccw_req, devlist);
}
} else { /* error */
memcpy(&cqr->irb, irb, sizeof(struct irb));
/* log sense for every failed I/O to s390 debugfeature */
dasd_log_sense_dbf(cqr, irb);
if (device->features & DASD_FEATURE_ERPLOG) {
dasd_log_sense(cqr, irb);
}
/*
* If we don't want complex ERP for this request, then just
* reset this and retry it in the fastpath
*/
if (!test_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags) &&
cqr->retries > 0) {
if (cqr->lpm == LPM_ANYPATH)
if (cqr->lpm == device->path_data.opm)
DBF_DEV_EVENT(DBF_DEBUG, device,
"default ERP in fastpath "
"(%i retries left)",
cqr->retries);
cqr->lpm = LPM_ANYPATH;
if (!test_bit(DASD_CQR_VERIFY_PATH, &cqr->flags))
cqr->lpm = device->path_data.opm;
cqr->status = DASD_CQR_QUEUED;
next = cqr;
} else
@ -1210,13 +1231,13 @@ enum uc_todo dasd_generic_uc_handler(struct ccw_device *cdev, struct irb *irb)
goto out;
if (test_bit(DASD_FLAG_OFFLINE, &device->flags) ||
device->state != device->target ||
!device->discipline->handle_unsolicited_interrupt){
!device->discipline->check_for_device_change){
dasd_put_device(device);
goto out;
}
dasd_device_clear_timer(device);
device->discipline->handle_unsolicited_interrupt(device, irb);
if (device->discipline->dump_sense_dbf)
device->discipline->dump_sense_dbf(device, irb, "uc");
device->discipline->check_for_device_change(device, NULL, irb);
dasd_put_device(device);
out:
return UC_TODO_RETRY;
@ -1366,8 +1387,14 @@ static void __dasd_device_start_head(struct dasd_device *device)
cqr = list_entry(device->ccw_queue.next, struct dasd_ccw_req, devlist);
if (cqr->status != DASD_CQR_QUEUED)
return;
/* when device is stopped, return request to previous layer */
if (device->stopped) {
/* when device is stopped, return request to previous layer
* exception: only the disconnect or unresumed bits are set and the
* cqr is a path verification request
*/
if (device->stopped &&
!(!(device->stopped & ~(DASD_STOPPED_DC_WAIT | DASD_UNRESUMED_PM))
&& test_bit(DASD_CQR_VERIFY_PATH, &cqr->flags))) {
cqr->intrc = -EAGAIN;
cqr->status = DASD_CQR_CLEARED;
dasd_schedule_device_bh(device);
return;
@ -1383,6 +1410,23 @@ static void __dasd_device_start_head(struct dasd_device *device)
dasd_device_set_timer(device, 50);
}
static void __dasd_device_check_path_events(struct dasd_device *device)
{
int rc;
if (device->path_data.tbvpm) {
if (device->stopped & ~(DASD_STOPPED_DC_WAIT |
DASD_UNRESUMED_PM))
return;
rc = device->discipline->verify_path(
device, device->path_data.tbvpm);
if (rc)
dasd_device_set_timer(device, 50);
else
device->path_data.tbvpm = 0;
}
};
/*
* Go through all request on the dasd_device request queue,
* terminate them on the cdev if necessary, and return them to the
@ -1457,6 +1501,7 @@ static void dasd_device_tasklet(struct dasd_device *device)
__dasd_device_check_expire(device);
/* find final requests on ccw queue */
__dasd_device_process_ccw_queue(device, &final_queue);
__dasd_device_check_path_events(device);
spin_unlock_irq(get_ccwdev_lock(device->cdev));
/* Now call the callback function of requests with final status */
__dasd_device_process_final_queue(device, &final_queue);
@ -1613,7 +1658,12 @@ static int _dasd_sleep_on(struct dasd_ccw_req *maincqr, int interruptible)
continue;
if (cqr->status != DASD_CQR_FILLED) /* could be failed */
continue;
if (test_bit(DASD_FLAG_LOCK_STOLEN, &device->flags) &&
!test_bit(DASD_CQR_ALLOW_SLOCK, &cqr->flags)) {
cqr->status = DASD_CQR_FAILED;
cqr->intrc = -EPERM;
continue;
}
/* Non-temporary stop condition will trigger fail fast */
if (device->stopped & ~DASD_STOPPED_PENDING &&
test_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags) &&
@ -1621,7 +1671,6 @@ static int _dasd_sleep_on(struct dasd_ccw_req *maincqr, int interruptible)
cqr->status = DASD_CQR_FAILED;
continue;
}
/* Don't try to start requests if device is stopped */
if (interruptible) {
rc = wait_event_interruptible(
@ -1706,13 +1755,18 @@ int dasd_sleep_on_immediatly(struct dasd_ccw_req *cqr)
int rc;
device = cqr->startdev;
if (test_bit(DASD_FLAG_LOCK_STOLEN, &device->flags) &&
!test_bit(DASD_CQR_ALLOW_SLOCK, &cqr->flags)) {
cqr->status = DASD_CQR_FAILED;
cqr->intrc = -EPERM;
return -EIO;
}
spin_lock_irq(get_ccwdev_lock(device->cdev));
rc = _dasd_term_running_cqr(device);
if (rc) {
spin_unlock_irq(get_ccwdev_lock(device->cdev));
return rc;
}
cqr->callback = dasd_wakeup_cb;
cqr->callback_data = DASD_SLEEPON_START_TAG;
cqr->status = DASD_CQR_QUEUED;
@ -2016,6 +2070,13 @@ static void __dasd_block_start_head(struct dasd_block *block)
list_for_each_entry(cqr, &block->ccw_queue, blocklist) {
if (cqr->status != DASD_CQR_FILLED)
continue;
if (test_bit(DASD_FLAG_LOCK_STOLEN, &block->base->flags) &&
!test_bit(DASD_CQR_ALLOW_SLOCK, &cqr->flags)) {
cqr->status = DASD_CQR_FAILED;
cqr->intrc = -EPERM;
dasd_schedule_block_bh(block);
continue;
}
/* Non-temporary stop condition will trigger fail fast */
if (block->base->stopped & ~DASD_STOPPED_PENDING &&
test_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags) &&
@ -2201,8 +2262,20 @@ static void dasd_setup_queue(struct dasd_block *block)
{
int max;
blk_queue_logical_block_size(block->request_queue, block->bp_block);
max = block->base->discipline->max_blocks << block->s2b_shift;
if (block->base->features & DASD_FEATURE_USERAW) {
/*
* the max_blocks value for raw_track access is 256
* it is higher than the native ECKD value because we
* only need one ccw per track
* so the max_hw_sectors are
* 2048 x 512B = 1024kB = 16 tracks
*/
max = 2048;
} else {
max = block->base->discipline->max_blocks << block->s2b_shift;
}
blk_queue_logical_block_size(block->request_queue,
block->bp_block);
blk_queue_max_hw_sectors(block->request_queue, max);
blk_queue_max_segments(block->request_queue, -1L);
/* with page sized segments we can translate each segement into
@ -2588,10 +2661,53 @@ int dasd_generic_set_offline(struct ccw_device *cdev)
return 0;
}
int dasd_generic_last_path_gone(struct dasd_device *device)
{
struct dasd_ccw_req *cqr;
dev_warn(&device->cdev->dev, "No operational channel path is left "
"for the device\n");
DBF_DEV_EVENT(DBF_WARNING, device, "%s", "last path gone");
/* First of all call extended error reporting. */
dasd_eer_write(device, NULL, DASD_EER_NOPATH);
if (device->state < DASD_STATE_BASIC)
return 0;
/* Device is active. We want to keep it. */
list_for_each_entry(cqr, &device->ccw_queue, devlist)
if ((cqr->status == DASD_CQR_IN_IO) ||
(cqr->status == DASD_CQR_CLEAR_PENDING)) {
cqr->status = DASD_CQR_QUEUED;
cqr->retries++;
}
dasd_device_set_stop_bits(device, DASD_STOPPED_DC_WAIT);
dasd_device_clear_timer(device);
dasd_schedule_device_bh(device);
return 1;
}
EXPORT_SYMBOL_GPL(dasd_generic_last_path_gone);
int dasd_generic_path_operational(struct dasd_device *device)
{
dev_info(&device->cdev->dev, "A channel path to the device has become "
"operational\n");
DBF_DEV_EVENT(DBF_WARNING, device, "%s", "path operational");
dasd_device_remove_stop_bits(device, DASD_STOPPED_DC_WAIT);
if (device->stopped & DASD_UNRESUMED_PM) {
dasd_device_remove_stop_bits(device, DASD_UNRESUMED_PM);
dasd_restore_device(device);
return 1;
}
dasd_schedule_device_bh(device);
if (device->block)
dasd_schedule_block_bh(device->block);
return 1;
}
EXPORT_SYMBOL_GPL(dasd_generic_path_operational);
int dasd_generic_notify(struct ccw_device *cdev, int event)
{
struct dasd_device *device;
struct dasd_ccw_req *cqr;
int ret;
device = dasd_device_from_cdev_locked(cdev);
@ -2602,41 +2718,64 @@ int dasd_generic_notify(struct ccw_device *cdev, int event)
case CIO_GONE:
case CIO_BOXED:
case CIO_NO_PATH:
/* First of all call extended error reporting. */
dasd_eer_write(device, NULL, DASD_EER_NOPATH);
if (device->state < DASD_STATE_BASIC)
break;
/* Device is active. We want to keep it. */
list_for_each_entry(cqr, &device->ccw_queue, devlist)
if (cqr->status == DASD_CQR_IN_IO) {
cqr->status = DASD_CQR_QUEUED;
cqr->retries++;
}
dasd_device_set_stop_bits(device, DASD_STOPPED_DC_WAIT);
dasd_device_clear_timer(device);
dasd_schedule_device_bh(device);
ret = 1;
device->path_data.opm = 0;
device->path_data.ppm = 0;
device->path_data.npm = 0;
ret = dasd_generic_last_path_gone(device);
break;
case CIO_OPER:
/* FIXME: add a sanity check. */
dasd_device_remove_stop_bits(device, DASD_STOPPED_DC_WAIT);
if (device->stopped & DASD_UNRESUMED_PM) {
dasd_device_remove_stop_bits(device, DASD_UNRESUMED_PM);
dasd_restore_device(device);
ret = 1;
break;
}
dasd_schedule_device_bh(device);
if (device->block)
dasd_schedule_block_bh(device->block);
ret = 1;
if (device->path_data.opm)
ret = dasd_generic_path_operational(device);
break;
}
dasd_put_device(device);
return ret;
}
void dasd_generic_path_event(struct ccw_device *cdev, int *path_event)
{
int chp;
__u8 oldopm, eventlpm;
struct dasd_device *device;
device = dasd_device_from_cdev_locked(cdev);
if (IS_ERR(device))
return;
for (chp = 0; chp < 8; chp++) {
eventlpm = 0x80 >> chp;
if (path_event[chp] & PE_PATH_GONE) {
oldopm = device->path_data.opm;
device->path_data.opm &= ~eventlpm;
device->path_data.ppm &= ~eventlpm;
device->path_data.npm &= ~eventlpm;
if (oldopm && !device->path_data.opm)
dasd_generic_last_path_gone(device);
}
if (path_event[chp] & PE_PATH_AVAILABLE) {
device->path_data.opm &= ~eventlpm;
device->path_data.ppm &= ~eventlpm;
device->path_data.npm &= ~eventlpm;
device->path_data.tbvpm |= eventlpm;
dasd_schedule_device_bh(device);
}
}
dasd_put_device(device);
}
EXPORT_SYMBOL_GPL(dasd_generic_path_event);
int dasd_generic_verify_path(struct dasd_device *device, __u8 lpm)
{
if (!device->path_data.opm && lpm) {
device->path_data.opm = lpm;
dasd_generic_path_operational(device);
} else
device->path_data.opm |= lpm;
return 0;
}
EXPORT_SYMBOL_GPL(dasd_generic_verify_path);
int dasd_generic_pm_freeze(struct ccw_device *cdev)
{
struct dasd_ccw_req *cqr, *n;
@ -2646,6 +2785,10 @@ int dasd_generic_pm_freeze(struct ccw_device *cdev)
if (IS_ERR(device))
return PTR_ERR(device);
if (device->discipline->freeze)
rc = device->discipline->freeze(device);
/* disallow new I/O */
dasd_device_set_stop_bits(device, DASD_STOPPED_PM);
/* clear active requests */
@ -2682,9 +2825,6 @@ int dasd_generic_pm_freeze(struct ccw_device *cdev)
list_splice_tail(&freeze_queue, &device->ccw_queue);
spin_unlock_irq(get_ccwdev_lock(cdev));
if (device->discipline->freeze)
rc = device->discipline->freeze(device);
dasd_put_device(device);
return rc;
}

16
drivers/s390/block/dasd_3990_erp.c
View file

@ -152,9 +152,9 @@ dasd_3990_erp_alternate_path(struct dasd_ccw_req * erp)
spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
opm = ccw_device_get_path_mask(device->cdev);
spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
//FIXME: start with get_opm ?
if (erp->lpm == 0)
erp->lpm = LPM_ANYPATH & ~(erp->irb.esw.esw0.sublog.lpum);
erp->lpm = device->path_data.opm &
~(erp->irb.esw.esw0.sublog.lpum);
else
erp->lpm &= ~(erp->irb.esw.esw0.sublog.lpum);
@ -270,10 +270,11 @@ static struct dasd_ccw_req *dasd_3990_erp_action_1(struct dasd_ccw_req *erp)
{
erp->function = dasd_3990_erp_action_1;
dasd_3990_erp_alternate_path(erp);
if (erp->status == DASD_CQR_FAILED) {
if (erp->status == DASD_CQR_FAILED &&
!test_bit(DASD_CQR_VERIFY_PATH, &erp->flags)) {
erp->status = DASD_CQR_FILLED;
erp->retries = 10;
erp->lpm = LPM_ANYPATH;
erp->lpm = erp->startdev->path_data.opm;
erp->function = dasd_3990_erp_action_1_sec;
}
return erp;
@ -1907,15 +1908,14 @@ dasd_3990_erp_compound_retry(struct dasd_ccw_req * erp, char *sense)
static void
dasd_3990_erp_compound_path(struct dasd_ccw_req * erp, char *sense)
{
if (sense[25] & DASD_SENSE_BIT_3) {
dasd_3990_erp_alternate_path(erp);
if (erp->status == DASD_CQR_FAILED) {
if (erp->status == DASD_CQR_FAILED &&
!test_bit(DASD_CQR_VERIFY_PATH, &erp->flags)) {
/* reset the lpm and the status to be able to
* try further actions. */
erp->lpm = 0;
erp->lpm = erp->startdev->path_data.opm;
erp->status = DASD_CQR_NEED_ERP;
}
}

155
drivers/s390/block/dasd_devmap.c
View file

@ -208,6 +208,8 @@ dasd_feature_list(char *str, char **endp)
features |= DASD_FEATURE_READONLY;
else if (len == 4 && !strncmp(str, "diag", 4))
features |= DASD_FEATURE_USEDIAG;
else if (len == 3 && !strncmp(str, "raw", 3))
features |= DASD_FEATURE_USERAW;
else if (len == 6 && !strncmp(str, "erplog", 6))
features |= DASD_FEATURE_ERPLOG;
else if (len == 8 && !strncmp(str, "failfast", 8))
@ -639,6 +641,7 @@ dasd_put_device_wake(struct dasd_device *device)
{
wake_up(&dasd_delete_wq);
}
EXPORT_SYMBOL_GPL(dasd_put_device_wake);
/*
* Return dasd_device structure associated with cdev.
@ -856,7 +859,7 @@ dasd_use_diag_store(struct device *dev, struct device_attribute *attr,
spin_lock(&dasd_devmap_lock);
/* Changing diag discipline flag is only allowed in offline state. */
rc = count;
if (!devmap->device) {
if (!devmap->device && !(devmap->features & DASD_FEATURE_USERAW)) {
if (val)
devmap->features |= DASD_FEATURE_USEDIAG;
else
@ -869,6 +872,56 @@ dasd_use_diag_store(struct device *dev, struct device_attribute *attr,
static DEVICE_ATTR(use_diag, 0644, dasd_use_diag_show, dasd_use_diag_store);
/*
* use_raw controls whether the driver should give access to raw eckd data or
* operate in standard mode
*/
static ssize_t
dasd_use_raw_show(struct device *dev, struct device_attribute *attr, char *buf)
{
struct dasd_devmap *devmap;
int use_raw;
devmap = dasd_find_busid(dev_name(dev));
if (!IS_ERR(devmap))
use_raw = (devmap->features & DASD_FEATURE_USERAW) != 0;
else
use_raw = (DASD_FEATURE_DEFAULT & DASD_FEATURE_USERAW) != 0;
return sprintf(buf, use_raw ? "1\n" : "0\n");
}
static ssize_t
dasd_use_raw_store(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct dasd_devmap *devmap;
ssize_t rc;
unsigned long val;
devmap = dasd_devmap_from_cdev(to_ccwdev(dev));
if (IS_ERR(devmap))
return PTR_ERR(devmap);
if ((strict_strtoul(buf, 10, &val) != 0) || val > 1)
return -EINVAL;
spin_lock(&dasd_devmap_lock);
/* Changing diag discipline flag is only allowed in offline state. */
rc = count;
if (!devmap->device && !(devmap->features & DASD_FEATURE_USEDIAG)) {
if (val)
devmap->features |= DASD_FEATURE_USERAW;
else
devmap->features &= ~DASD_FEATURE_USERAW;
} else
rc = -EPERM;
spin_unlock(&dasd_devmap_lock);
return rc;
}
static DEVICE_ATTR(raw_track_access, 0644, dasd_use_raw_show,
dasd_use_raw_store);
static ssize_t
dasd_discipline_show(struct device *dev, struct device_attribute *attr,
char *buf)
@ -1126,6 +1179,103 @@ dasd_expires_store(struct device *dev, struct device_attribute *attr,
static DEVICE_ATTR(expires, 0644, dasd_expires_show, dasd_expires_store);
static ssize_t dasd_reservation_policy_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
struct dasd_devmap *devmap;
int rc = 0;
devmap = dasd_find_busid(dev_name(dev));
if (IS_ERR(devmap)) {
rc = snprintf(buf, PAGE_SIZE, "ignore\n");
} else {
spin_lock(&dasd_devmap_lock);
if (devmap->features & DASD_FEATURE_FAILONSLCK)
rc = snprintf(buf, PAGE_SIZE, "fail\n");
else
rc = snprintf(buf, PAGE_SIZE, "ignore\n");
spin_unlock(&dasd_devmap_lock);
}
return rc;
}
static ssize_t dasd_reservation_policy_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct dasd_devmap *devmap;
int rc;
devmap = dasd_devmap_from_cdev(to_ccwdev(dev));
if (IS_ERR(devmap))
return PTR_ERR(devmap);
rc = 0;
spin_lock(&dasd_devmap_lock);
if (sysfs_streq("ignore", buf))
devmap->features &= ~DASD_FEATURE_FAILONSLCK;
else if (sysfs_streq("fail", buf))
devmap->features |= DASD_FEATURE_FAILONSLCK;
else
rc = -EINVAL;
if (devmap->device)
devmap->device->features = devmap->features;
spin_unlock(&dasd_devmap_lock);
if (rc)
return rc;
else
return count;
}
static DEVICE_ATTR(reservation_policy, 0644,
dasd_reservation_policy_show, dasd_reservation_policy_store);
static ssize_t dasd_reservation_state_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
struct dasd_device *device;
int rc = 0;
device = dasd_device_from_cdev(to_ccwdev(dev));
if (IS_ERR(device))
return snprintf(buf, PAGE_SIZE, "none\n");
if (test_bit(DASD_FLAG_IS_RESERVED, &device->flags))
rc = snprintf(buf, PAGE_SIZE, "reserved\n");
else if (test_bit(DASD_FLAG_LOCK_STOLEN, &device->flags))
rc = snprintf(buf, PAGE_SIZE, "lost\n");
else
rc = snprintf(buf, PAGE_SIZE, "none\n");
dasd_put_device(device);
return rc;
}
static ssize_t dasd_reservation_state_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct dasd_device *device;
int rc = 0;
device = dasd_device_from_cdev(to_ccwdev(dev));
if (IS_ERR(device))
return -ENODEV;
if (sysfs_streq("reset", buf))
clear_bit(DASD_FLAG_LOCK_STOLEN, &device->flags);
else
rc = -EINVAL;
dasd_put_device(device);
if (rc)
return rc;
else
return count;
}
static DEVICE_ATTR(last_known_reservation_state, 0644,
dasd_reservation_state_show, dasd_reservation_state_store);
static struct attribute * dasd_attrs[] = {
&dev_attr_readonly.attr,
&dev_attr_discipline.attr,
@ -1134,10 +1284,13 @@ static struct attribute * dasd_attrs[] = {
&dev_attr_vendor.attr,
&dev_attr_uid.attr,
&dev_attr_use_diag.attr,
&dev_attr_raw_track_access.attr,
&dev_attr_eer_enabled.attr,
&dev_attr_erplog.attr,
&dev_attr_failfast.attr,
&dev_attr_expires.attr,
&dev_attr_reservation_policy.attr,
&dev_attr_last_known_reservation_state.attr,
NULL,
};

3
drivers/s390/block/dasd_diag.c
View file

@ -10,6 +10,7 @@
#define KMSG_COMPONENT "dasd"
#include <linux/kernel_stat.h>
#include <linux/stddef.h>
#include <linux/kernel.h>
#include <linux/slab.h>
@ -238,6 +239,7 @@ static void dasd_ext_handler(unsigned int ext_int_code,
addr_t ip;
int rc;
kstat_cpu(smp_processor_id()).irqs[EXTINT_DSD]++;
switch (ext_int_code >> 24) {
case DASD_DIAG_CODE_31BIT:
ip = (addr_t) param32;
@ -617,6 +619,7 @@ static struct dasd_discipline dasd_diag_discipline = {
.ebcname = "DIAG",
.max_blocks = DIAG_MAX_BLOCKS,
.check_device = dasd_diag_check_device,
.verify_path = dasd_generic_verify_path,
.fill_geometry = dasd_diag_fill_geometry,
.start_IO = dasd_start_diag,
.term_IO = dasd_diag_term_IO,

664
drivers/s390/block/dasd_eckd.c
View file

File diff suppressed because it is too large Load diff

17
drivers/s390/block/dasd_eckd.h
View file

@ -37,14 +37,17 @@
#define DASD_ECKD_CCW_WRITE_KD_MT 0x8d
#define DASD_ECKD_CCW_READ_KD_MT 0x8e
#define DASD_ECKD_CCW_RELEASE 0x94
#define DASD_ECKD_CCW_WRITE_FULL_TRACK 0x95
#define DASD_ECKD_CCW_READ_CKD_MT 0x9e
#define DASD_ECKD_CCW_WRITE_CKD_MT 0x9d
#define DASD_ECKD_CCW_WRITE_TRACK_DATA 0xA5
#define DASD_ECKD_CCW_READ_TRACK_DATA 0xA6
#define DASD_ECKD_CCW_RESERVE 0xB4
#define DASD_ECKD_CCW_READ_TRACK 0xDE
#define DASD_ECKD_CCW_PFX 0xE7
#define DASD_ECKD_CCW_PFX_READ 0xEA
#define DASD_ECKD_CCW_RSCK 0xF9
#define DASD_ECKD_CCW_RCD 0xFA
/*
* Perform Subsystem Function / Sub-Orders
@ -57,6 +60,11 @@
*/
#define LV_COMPAT_CYL 0xFFFE
#define FCX_MAX_DATA_FACTOR 65536
#define DASD_ECKD_RCD_DATA_SIZE 256
/*****************************************************************************
* SECTION: Type Definitions
****************************************************************************/
@ -331,12 +339,6 @@ struct dasd_gneq {
__u8 reserved2[22];
} __attribute__ ((packed));
struct dasd_eckd_path {
__u8 opm;
__u8 ppm;
__u8 npm;
};
struct dasd_rssd_features {
char feature[256];
} __attribute__((packed));
@ -442,7 +444,6 @@ struct dasd_eckd_private {
struct vd_sneq *vdsneq;
struct dasd_gneq *gneq;
struct dasd_eckd_path path_data;
struct eckd_count count_area[5];
int init_cqr_status;
int uses_cdl;
@ -455,6 +456,8 @@ struct dasd_eckd_private {
struct alias_pav_group *pavgroup;
struct alias_lcu *lcu;
int count;
u32 fcx_max_data;
};

1
drivers/s390/block/dasd_eer.c
View file

@ -473,6 +473,7 @@ int dasd_eer_enable(struct dasd_device *device)
cqr->retries = 255;
cqr->expires = 10 * HZ;
clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
set_bit(DASD_CQR_ALLOW_SLOCK, &cqr->flags);
ccw = cqr->cpaddr;
ccw->cmd_code = DASD_ECKD_CCW_SNSS;

3
drivers/s390/block/dasd_erp.c
View file

@ -96,7 +96,8 @@ dasd_default_erp_action(struct dasd_ccw_req *cqr)
DBF_DEV_EVENT(DBF_DEBUG, device,
"default ERP called (%i retries left)",
cqr->retries);
cqr->lpm = LPM_ANYPATH;
if (!test_bit(DASD_CQR_VERIFY_PATH, &cqr->flags))
cqr->lpm = device->path_data.opm;
cqr->status = DASD_CQR_FILLED;
} else {
pr_err("%s: default ERP has run out of retries and failed\n",

21
drivers/s390/block/dasd_fba.c
View file

@ -73,6 +73,7 @@ static struct ccw_driver dasd_fba_driver = {
.set_offline = dasd_generic_set_offline,
.set_online = dasd_fba_set_online,
.notify = dasd_generic_notify,
.path_event = dasd_generic_path_event,
.freeze = dasd_generic_pm_freeze,
.thaw = dasd_generic_restore_device,
.restore = dasd_generic_restore_device,
@ -164,6 +165,7 @@ dasd_fba_check_characteristics(struct dasd_device *device)
}
device->default_expires = DASD_EXPIRES;
device->path_data.opm = LPM_ANYPATH;
readonly = dasd_device_is_ro(device);
if (readonly)
@ -231,24 +233,16 @@ dasd_fba_erp_postaction(struct dasd_ccw_req * cqr)
return NULL;
}
static void dasd_fba_handle_unsolicited_interrupt(struct dasd_device *device,
struct irb *irb)
static void dasd_fba_check_for_device_change(struct dasd_device *device,
struct dasd_ccw_req *cqr,
struct irb *irb)
{
char mask;
/* first of all check for state change pending interrupt */
mask = DEV_STAT_ATTENTION | DEV_STAT_DEV_END | DEV_STAT_UNIT_EXCEP;
if ((irb->scsw.cmd.dstat & mask) == mask) {
if ((irb->scsw.cmd.dstat & mask) == mask)
dasd_generic_handle_state_change(device);
return;
}
/* check for unsolicited interrupts */
DBF_DEV_EVENT(DBF_WARNING, device, "%s",
"unsolicited interrupt received");
device->discipline->dump_sense_dbf(device, irb, "unsolicited");
dasd_schedule_device_bh(device);
return;
};
static struct dasd_ccw_req *dasd_fba_build_cp(struct dasd_device * memdev,
@ -596,13 +590,14 @@ static struct dasd_discipline dasd_fba_discipline = {
.max_blocks = 96,
.check_device = dasd_fba_check_characteristics,
.do_analysis = dasd_fba_do_analysis,
.verify_path = dasd_generic_verify_path,
.fill_geometry = dasd_fba_fill_geometry,
.start_IO = dasd_start_IO,
.term_IO = dasd_term_IO,
.handle_terminated_request = dasd_fba_handle_terminated_request,
.erp_action = dasd_fba_erp_action,
.erp_postaction = dasd_fba_erp_postaction,
.handle_unsolicited_interrupt = dasd_fba_handle_unsolicited_interrupt,
.check_for_device_change = dasd_fba_check_for_device_change,
.build_cp = dasd_fba_build_cp,
.free_cp = dasd_fba_free_cp,
.dump_sense = dasd_fba_dump_sense,

35
drivers/s390/block/dasd_int.h
View file

@ -231,6 +231,11 @@ struct dasd_ccw_req {
/* per dasd_ccw_req flags */
#define DASD_CQR_FLAGS_USE_ERP 0 /* use ERP for this request */
#define DASD_CQR_FLAGS_FAILFAST 1 /* FAILFAST */
#define DASD_CQR_VERIFY_PATH 2 /* path verification request */
#define DASD_CQR_ALLOW_SLOCK 3 /* Try this request even when lock was
* stolen. Should not be combined with
* DASD_CQR_FLAGS_USE_ERP
*/
/* Signature for error recovery functions. */
typedef struct dasd_ccw_req *(*dasd_erp_fn_t) (struct dasd_ccw_req *);
@ -286,6 +291,14 @@ struct dasd_discipline {
*/
int (*do_analysis) (struct dasd_block *);
/*
* This function is called, when new paths become available.
* Disciplins may use this callback to do necessary setup work,
* e.g. verify that new path is compatible with the current
* configuration.
*/
int (*verify_path)(struct dasd_device *, __u8);
/*
* Last things to do when a device is set online, and first things
* when it is set offline.
@ -325,9 +338,9 @@ struct dasd_discipline {
void (*dump_sense) (struct dasd_device *, struct dasd_ccw_req *,
struct irb *);
void (*dump_sense_dbf) (struct dasd_device *, struct irb *, char *);
void (*handle_unsolicited_interrupt) (struct dasd_device *,
struct irb *);
void (*check_for_device_change) (struct dasd_device *,
struct dasd_ccw_req *,
struct irb *);
/* i/o control functions. */
int (*fill_geometry) (struct dasd_block *, struct hd_geometry *);
@ -362,6 +375,13 @@ extern struct dasd_discipline *dasd_diag_discipline_pointer;
#define DASD_EER_STATECHANGE 3
#define DASD_EER_PPRCSUSPEND 4
struct dasd_path {
__u8 opm;
__u8 tbvpm;
__u8 ppm;
__u8 npm;
};
struct dasd_device {
/* Block device stuff. */
struct dasd_block *block;
@ -377,6 +397,7 @@ struct dasd_device {
struct dasd_discipline *discipline;
struct dasd_discipline *base_discipline;
char *private;
struct dasd_path path_data;
/* Device state and target state. */
int state, target;
@ -456,6 +477,9 @@ struct dasd_block {
* confuse this with the user specified
* read-only feature.
*/
#define DASD_FLAG_IS_RESERVED 7 /* The device is reserved */
#define DASD_FLAG_LOCK_STOLEN 8 /* The device lock was stolen */
void dasd_put_device_wake(struct dasd_device *);
@ -620,10 +644,15 @@ void dasd_generic_remove (struct ccw_device *cdev);
int dasd_generic_set_online(struct ccw_device *, struct dasd_discipline *);
int dasd_generic_set_offline (struct ccw_device *cdev);
int dasd_generic_notify(struct ccw_device *, int);
int dasd_generic_last_path_gone(struct dasd_device *);
int dasd_generic_path_operational(struct dasd_device *);
void dasd_generic_handle_state_change(struct dasd_device *);
int dasd_generic_pm_freeze(struct ccw_device *);
int dasd_generic_restore_device(struct ccw_device *);
enum uc_todo dasd_generic_uc_handler(struct ccw_device *, struct irb *);
void dasd_generic_path_event(struct ccw_device *, int *);
int dasd_generic_verify_path(struct dasd_device *, __u8);
int dasd_generic_read_dev_chars(struct dasd_device *, int, void *, int);
char *dasd_get_sense(struct irb *);

69
drivers/s390/char/Kconfig
View file

@ -2,76 +2,85 @@ comment "S/390 character device drivers"
depends on S390
config TN3270
tristate "Support for locally attached 3270 terminals"
def_tristate y
prompt "Support for locally attached 3270 terminals"
depends on CCW
help
Include support for IBM 3270 terminals.
config TN3270_TTY
tristate "Support for tty input/output on 3270 terminals"
def_tristate y
prompt "Support for tty input/output on 3270 terminals"
depends on TN3270
help
Include support for using an IBM 3270 terminal as a Linux tty.
config TN3270_FS
tristate "Support for fullscreen applications on 3270 terminals"
def_tristate m
prompt "Support for fullscreen applications on 3270 terminals"
depends on TN3270
help
Include support for fullscreen applications on an IBM 3270 terminal.
config TN3270_CONSOLE
bool "Support for console on 3270 terminal"
def_bool y
prompt "Support for console on 3270 terminal"
depends on TN3270=y && TN3270_TTY=y
help
Include support for using an IBM 3270 terminal as a Linux system
console. Available only if 3270 support is compiled in statically.
config TN3215
bool "Support for 3215 line mode terminal"
def_bool y
prompt "Support for 3215 line mode terminal"
depends on CCW
help
Include support for IBM 3215 line-mode terminals.
config TN3215_CONSOLE
bool "Support for console on 3215 line mode terminal"
def_bool y
prompt "Support for console on 3215 line mode terminal"
depends on TN3215
help
Include support for using an IBM 3215 line-mode terminal as a
Linux system console.
config CCW_CONSOLE
bool
depends on TN3215_CONSOLE || TN3270_CONSOLE
default y
def_bool y if TN3215_CONSOLE || TN3270_CONSOLE
config SCLP_TTY
bool "Support for SCLP line mode terminal"
def_bool y
prompt "Support for SCLP line mode terminal"
depends on S390
help
Include support for IBM SCLP line-mode terminals.
config SCLP_CONSOLE
bool "Support for console on SCLP line mode terminal"
def_bool y
prompt "Support for console on SCLP line mode terminal"
depends on SCLP_TTY
help
Include support for using an IBM HWC line-mode terminal as the Linux
system console.
config SCLP_VT220_TTY
bool "Support for SCLP VT220-compatible terminal"
def_bool y
prompt "Support for SCLP VT220-compatible terminal"
depends on S390
help
Include support for an IBM SCLP VT220-compatible terminal.
config SCLP_VT220_CONSOLE
bool "Support for console on SCLP VT220-compatible terminal"
def_bool y
prompt "Support for console on SCLP VT220-compatible terminal"
depends on SCLP_VT220_TTY
help
Include support for using an IBM SCLP VT220-compatible terminal as a
Linux system console.
config SCLP_CPI
tristate "Control-Program Identification"
def_tristate m
prompt "Control-Program Identification"
depends on S390
help
This option enables the hardware console interface for system
@ -83,7 +92,8 @@ config SCLP_CPI
need this feature and intend to run your kernel in LPAR.
config SCLP_ASYNC
tristate "Support for Call Home via Asynchronous SCLP Records"
def_tristate m
prompt "Support for Call Home via Asynchronous SCLP Records"
depends on S390
help
This option enables the call home function, which is able to inform
@ -93,7 +103,8 @@ config SCLP_ASYNC
need this feature and intend to run your kernel in LPAR.
config S390_TAPE
tristate "S/390 tape device support"
def_tristate m
prompt "S/390 tape device support"
depends on CCW
help
Select this option if you want to access channel-attached tape
@ -109,7 +120,8 @@ comment "S/390 tape interface support"
depends on S390_TAPE
config S390_TAPE_BLOCK
bool "Support for tape block devices"
def_bool y
prompt "Support for tape block devices"
depends on S390_TAPE && BLOCK
help
Select this option if you want to access your channel-attached tape
@ -123,7 +135,8 @@ comment "S/390 tape hardware support"
depends on S390_TAPE
config S390_TAPE_34XX
tristate "Support for 3480/3490 tape hardware"
def_tristate m
prompt "Support for 3480/3490 tape hardware"
depends on S390_TAPE
help
Select this option if you want to access IBM 3480/3490 magnetic
@ -131,7 +144,8 @@ config S390_TAPE_34XX
It is safe to say "Y" here.
config S390_TAPE_3590
tristate "Support for 3590 tape hardware"
def_tristate m
prompt "Support for 3590 tape hardware"
depends on S390_TAPE
help
Select this option if you want to access IBM 3590 magnetic
@ -139,7 +153,8 @@ config S390_TAPE_3590
It is safe to say "Y" here.
config VMLOGRDR
tristate "Support for the z/VM recording system services (VM only)"
def_tristate m
prompt "Support for the z/VM recording system services (VM only)"
depends on IUCV
help
Select this option if you want to be able to receive records collected
@ -148,29 +163,31 @@ config VMLOGRDR
This driver depends on the IUCV support driver.
config VMCP
bool "Support for the z/VM CP interface"
def_bool y
prompt "Support for the z/VM CP interface"
depends on S390
help
Select this option if you want to be able to interact with the control
program on z/VM
config MONREADER
tristate "API for reading z/VM monitor service records"
def_tristate m
prompt "API for reading z/VM monitor service records"
depends on IUCV
help
Character device driver for reading z/VM monitor service records
config MONWRITER
tristate "API for writing z/VM monitor service records"
def_tristate m
prompt "API for writing z/VM monitor service records"
depends on S390
default "m"
help
Character device driver for writing z/VM monitor service records
config S390_VMUR
tristate "z/VM unit record device driver"
def_tristate m
prompt "z/VM unit record device driver"
depends on S390
default "m"
help
Character device driver for z/VM reader, puncher and printer.

2
drivers/s390/char/con3215.c
View file

@ -9,6 +9,7 @@
* Dan Morrison, IBM Corporation <dmorriso@cse.buffalo.edu>
*/
#include <linux/kernel_stat.h>
#include <linux/module.h>
#include <linux/types.h>
#include <linux/kdev_t.h>
@ -361,6 +362,7 @@ static void raw3215_irq(struct ccw_device *cdev, unsigned long intparm,
int cstat, dstat;
int count;
kstat_cpu(smp_processor_id()).irqs[IOINT_C15]++;
raw = dev_get_drvdata(&cdev->dev);
req = (struct raw3215_req *) intparm;
cstat = irb->scsw.cmd.cstat;

2
drivers/s390/char/raw3270.c
View file

@ -7,6 +7,7 @@
* Copyright IBM Corp. 2003, 2009
*/
#include <linux/kernel_stat.h>
#include <linux/module.h>
#include <linux/err.h>
#include <linux/init.h>
@ -329,6 +330,7 @@ raw3270_irq (struct ccw_device *cdev, unsigned long intparm, struct irb *irb)
struct raw3270_request *rq;
int rc;
kstat_cpu(smp_processor_id()).irqs[IOINT_C70]++;
rp = dev_get_drvdata(&cdev->dev);
if (!rp)
return;

18
drivers/s390/char/sclp.c
View file

@ -7,6 +7,7 @@
* Martin Schwidefsky <schwidefsky@de.ibm.com>
*/
#include <linux/kernel_stat.h>
#include <linux/module.h>
#include <linux/err.h>
#include <linux/spinlock.h>
@ -18,16 +19,14 @@
#include <linux/suspend.h>
#include <linux/completion.h>
#include <linux/platform_device.h>
#include <asm/types.h>
#include <asm/s390_ext.h>
#include <asm/types.h>
#include <asm/irq.h>
#include "sclp.h"
#define SCLP_HEADER "sclp: "
/* Structure for register_early_external_interrupt. */
static ext_int_info_t ext_int_info_hwc;
/* Lock to protect internal data consistency. */
static DEFINE_SPINLOCK(sclp_lock);
@ -402,6 +401,7 @@ static void sclp_interrupt_handler(unsigned int ext_int_code,
u32 finished_sccb;
u32 evbuf_pending;
kstat_cpu(smp_processor_id()).irqs[EXTINT_SCP]++;
spin_lock(&sclp_lock);
finished_sccb = param32 & 0xfffffff8;
evbuf_pending = param32 & 0x3;
@ -824,6 +824,7 @@ static void sclp_check_handler(unsigned int ext_int_code,
{
u32 finished_sccb;
kstat_cpu(smp_processor_id()).irqs[EXTINT_SCP]++;
finished_sccb = param32 & 0xfffffff8;
/* Is this the interrupt we are waiting for? */
if (finished_sccb == 0)
@ -866,8 +867,7 @@ sclp_check_interface(void)
spin_lock_irqsave(&sclp_lock, flags);
/* Prepare init mask command */
rc = register_early_external_interrupt(0x2401, sclp_check_handler,
&ext_int_info_hwc);
rc = register_external_interrupt(0x2401, sclp_check_handler);
if (rc) {
spin_unlock_irqrestore(&sclp_lock, flags);
return rc;
@ -900,8 +900,7 @@ sclp_check_interface(void)
} else
rc = -EBUSY;
}
unregister_early_external_interrupt(0x2401, sclp_check_handler,
&ext_int_info_hwc);
unregister_external_interrupt(0x2401, sclp_check_handler);
spin_unlock_irqrestore(&sclp_lock, flags);
return rc;
}
@ -1064,8 +1063,7 @@ sclp_init(void)
if (rc)
goto fail_init_state_uninitialized;
/* Register interrupt handler */
rc = register_early_external_interrupt(0x2401, sclp_interrupt_handler,
&ext_int_info_hwc);
rc = register_external_interrupt(0x2401, sclp_interrupt_handler);
if (rc)
goto fail_unregister_reboot_notifier;
sclp_init_state = sclp_init_state_initialized;

1
drivers/s390/char/sclp_config.c
View file

@ -33,6 +33,7 @@ static void sclp_cpu_capability_notify(struct work_struct *work)
int cpu;
struct sys_device *sysdev;
s390_adjust_jiffies();
pr_warning("cpu capability changed.\n");
get_online_cpus();
for_each_online_cpu(cpu) {

2
drivers/s390/char/tape_core.c
View file

@ -14,6 +14,7 @@
#define KMSG_COMPONENT "tape"
#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
#include <linux/kernel_stat.h>
#include <linux/module.h>
#include <linux/init.h> // for kernel parameters
#include <linux/kmod.h> // for requesting modules
@ -1114,6 +1115,7 @@ __tape_do_irq (struct ccw_device *cdev, unsigned long intparm, struct irb *irb)
struct tape_request *request;
int rc;
kstat_cpu(smp_processor_id()).irqs[IOINT_TAP]++;
device = dev_get_drvdata(&cdev->dev);
if (device == NULL) {
return;

2
drivers/s390/char/vmur.c
View file

@ -11,6 +11,7 @@
#define KMSG_COMPONENT "vmur"
#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
#include <linux/kernel_stat.h>
#include <linux/cdev.h>
#include <linux/slab.h>
@ -302,6 +303,7 @@ static void ur_int_handler(struct ccw_device *cdev, unsigned long intparm,
{
struct urdev *urd;
kstat_cpu(smp_processor_id()).irqs[IOINT_VMR]++;
TRACE("ur_int_handler: intparm=0x%lx cstat=%02x dstat=%02x res=%u\n",
intparm, irb->scsw.cmd.cstat, irb->scsw.cmd.dstat,
irb->scsw.cmd.count);

78
drivers/s390/cio/ccwgroup.c
View file

@ -66,6 +66,27 @@ __ccwgroup_remove_symlinks(struct ccwgroup_device *gdev)
}
/*
* Remove references from ccw devices to ccw group device and from
* ccw group device to ccw devices.
*/
static void __ccwgroup_remove_cdev_refs(struct ccwgroup_device *gdev)
{
struct ccw_device *cdev;
int i;
for (i = 0; i < gdev->count; i++) {
cdev = gdev->cdev[i];
if (!cdev)
continue;
spin_lock_irq(cdev->ccwlock);
dev_set_drvdata(&cdev->dev, NULL);
spin_unlock_irq(cdev->ccwlock);
gdev->cdev[i] = NULL;
put_device(&cdev->dev);
}
}
/*
* Provide an 'ungroup' attribute so the user can remove group devices no
* longer needed or accidentially created. Saves memory :)
@ -78,6 +99,7 @@ static void ccwgroup_ungroup_callback(struct device *dev)
if (device_is_registered(&gdev->dev)) {
__ccwgroup_remove_symlinks(gdev);
device_unregister(dev);
__ccwgroup_remove_cdev_refs(gdev);
}
mutex_unlock(&gdev->reg_mutex);
}
@ -116,21 +138,7 @@ static DEVICE_ATTR(ungroup, 0200, NULL, ccwgroup_ungroup_store);
static void
ccwgroup_release (struct device *dev)
{
struct ccwgroup_device *gdev;
int i;
gdev = to_ccwgroupdev(dev);
for (i = 0; i < gdev->count; i++) {
if (gdev->cdev[i]) {
spin_lock_irq(gdev->cdev[i]->ccwlock);
if (dev_get_drvdata(&gdev->cdev[i]->dev) == gdev)
dev_set_drvdata(&gdev->cdev[i]->dev, NULL);
spin_unlock_irq(gdev->cdev[i]->ccwlock);
put_device(&gdev->cdev[i]->dev);
}
}
kfree(gdev);
kfree(to_ccwgroupdev(dev));
}
static int
@ -639,6 +647,7 @@ void ccwgroup_driver_unregister(struct ccwgroup_driver *cdriver)
mutex_lock(&gdev->reg_mutex);
__ccwgroup_remove_symlinks(gdev);
device_unregister(dev);
__ccwgroup_remove_cdev_refs(gdev);
mutex_unlock(&gdev->reg_mutex);
put_device(dev);
}
@ -660,25 +669,6 @@ int ccwgroup_probe_ccwdev(struct ccw_device *cdev)
return 0;
}
static struct ccwgroup_device *
__ccwgroup_get_gdev_by_cdev(struct ccw_device *cdev)
{
struct ccwgroup_device *gdev;
gdev = dev_get_drvdata(&cdev->dev);
if (gdev) {
if (get_device(&gdev->dev)) {
mutex_lock(&gdev->reg_mutex);
if (device_is_registered(&gdev->dev))
return gdev;
mutex_unlock(&gdev->reg_mutex);
put_device(&gdev->dev);
}
return NULL;
}
return NULL;
}
/**
* ccwgroup_remove_ccwdev() - remove function for slave devices
* @cdev: ccw device to be removed
@ -694,13 +684,25 @@ void ccwgroup_remove_ccwdev(struct ccw_device *cdev)
/* Ignore offlining errors, device is gone anyway. */
ccw_device_set_offline(cdev);
/* If one of its devices is gone, the whole group is done for. */
gdev = __ccwgroup_get_gdev_by_cdev(cdev);
if (gdev) {
spin_lock_irq(cdev->ccwlock);
gdev = dev_get_drvdata(&cdev->dev);
if (!gdev) {
spin_unlock_irq(cdev->ccwlock);
return;
}
/* Get ccwgroup device reference for local processing. */
get_device(&gdev->dev);
spin_unlock_irq(cdev->ccwlock);
/* Unregister group device. */
mutex_lock(&gdev->reg_mutex);
if (device_is_registered(&gdev->dev)) {
__ccwgroup_remove_symlinks(gdev);
device_unregister(&gdev->dev);
mutex_unlock(&gdev->reg_mutex);
put_device(&gdev->dev);
__ccwgroup_remove_cdev_refs(gdev);
}
mutex_unlock(&gdev->reg_mutex);
/* Release ccwgroup device reference for local processing. */
put_device(&gdev->dev);
}
MODULE_LICENSE("GPL");

19
drivers/s390/cio/chsc.c
View file

@ -695,6 +695,25 @@ int chsc_determine_base_channel_path_desc(struct chp_id chpid,
return ret;
}
int chsc_determine_fmt1_channel_path_desc(struct chp_id chpid,
struct channel_path_desc_fmt1 *desc)
{
struct chsc_response_struct *chsc_resp;
struct chsc_scpd *scpd_area;
int ret;
spin_lock_irq(&chsc_page_lock);
scpd_area = chsc_page;
ret = chsc_determine_channel_path_desc(chpid, 0, 0, 1, 0, scpd_area);
if (ret)
goto out;
chsc_resp = (void *)&scpd_area->response;
memcpy(desc, &chsc_resp->data, sizeof(*desc));
out:
spin_unlock_irq(&chsc_page_lock);
return ret;
}
static void
chsc_initialize_cmg_chars(struct channel_path *chp, u8 cmcv,
struct cmg_chars *chars)

18
drivers/s390/cio/chsc.h
View file

@ -35,6 +35,22 @@ struct channel_path_desc {
u8 chpp;
} __attribute__ ((packed));
struct channel_path_desc_fmt1 {
u8 flags;
u8 lsn;
u8 desc;
u8 chpid;
u32:24;
u8 chpp;
u32 unused[3];
u16 mdc;
u16:13;
u8 r:1;
u8 s:1;
u8 f:1;
u32 zeros[2];
} __attribute__ ((packed));
struct channel_path;
struct css_chsc_char {
@ -92,6 +108,8 @@ int chsc_determine_channel_path_desc(struct chp_id chpid, int fmt, int rfmt,
int c, int m, void *page);
int chsc_determine_base_channel_path_desc(struct chp_id chpid,
struct channel_path_desc *desc);
int chsc_determine_fmt1_channel_path_desc(struct chp_id chpid,
struct channel_path_desc_fmt1 *desc);
void chsc_chp_online(struct chp_id chpid);
void chsc_chp_offline(struct chp_id chpid);
int chsc_get_channel_measurement_chars(struct channel_path *chp);

8
drivers/s390/cio/css.c
View file

@ -618,6 +618,7 @@ EXPORT_SYMBOL_GPL(css_schedule_reprobe);
static void css_process_crw(struct crw *crw0, struct crw *crw1, int overflow)
{
struct subchannel_id mchk_schid;
struct subchannel *sch;
if (overflow) {
css_schedule_eval_all();
@ -637,6 +638,13 @@ static void css_process_crw(struct crw *crw0, struct crw *crw1, int overflow)
if (crw1)
mchk_schid.ssid = (crw1->rsid >> 4) & 3;
if (crw0->erc == CRW_ERC_PMOD) {
sch = get_subchannel_by_schid(mchk_schid);
if (sch) {
css_update_ssd_info(sch);
put_device(&sch->dev);
}
}
/*
* Since we are always presented with IPI in the CRW, we have to
* use stsch() to find out if the subchannel in question has come

40
drivers/s390/cio/device_ops.c
View file

@ -686,6 +686,46 @@ int ccw_device_tm_start_timeout(struct ccw_device *cdev, struct tcw *tcw,
}
EXPORT_SYMBOL(ccw_device_tm_start_timeout);
/**
* ccw_device_get_mdc - accumulate max data count
* @cdev: ccw device for which the max data count is accumulated
* @mask: mask of paths to use
*
* Return the number of 64K-bytes blocks all paths at least support
* for a transport command. Return values <= 0 indicate failures.
*/
int ccw_device_get_mdc(struct ccw_device *cdev, u8 mask)
{
struct subchannel *sch = to_subchannel(cdev->dev.parent);
struct channel_path_desc_fmt1 desc;
struct chp_id chpid;
int mdc = 0, ret, i;
/* Adjust requested path mask to excluded varied off paths. */
if (mask)
mask &= sch->lpm;
else
mask = sch->lpm;
chp_id_init(&chpid);
for (i = 0; i < 8; i++) {
if (!(mask & (0x80 >> i)))
continue;
chpid.id = sch->schib.pmcw.chpid[i];
ret = chsc_determine_fmt1_channel_path_desc(chpid, &desc);
if (ret)
return ret;
if (!desc.f)
return 0;
if (!desc.r)
mdc = 1;
mdc = mdc ? min(mdc, (int)desc.mdc) : desc.mdc;
}
return mdc;
}
EXPORT_SYMBOL(ccw_device_get_mdc);
/**
* ccw_device_tm_intrg - perform interrogate function
* @cdev: ccw device on which to perform the interrogate function

62
drivers/s390/cio/itcw.c
View file

@ -93,6 +93,7 @@ EXPORT_SYMBOL(itcw_get_tcw);
size_t itcw_calc_size(int intrg, int max_tidaws, int intrg_max_tidaws)
{
size_t len;
int cross_count;
/* Main data. */
len = sizeof(struct itcw);
@ -105,12 +106,27 @@ size_t itcw_calc_size(int intrg, int max_tidaws, int intrg_max_tidaws)
/* TSB */ sizeof(struct tsb) +
/* TIDAL */ intrg_max_tidaws * sizeof(struct tidaw);
}
/* Maximum required alignment padding. */
len += /* Initial TCW */ 63 + /* Interrogate TCCB */ 7;
/* Maximum padding for structures that may not cross 4k boundary. */
if ((max_tidaws > 0) || (intrg_max_tidaws > 0))
len += max(max_tidaws, intrg_max_tidaws) *
sizeof(struct tidaw) - 1;
/* TIDAW lists may not cross a 4k boundary. To cross a
* boundary we need to add a TTIC TIDAW. We need to reserve
* one additional TIDAW for a TTIC that we may need to add due
* to the placement of the data chunk in memory, and a further
* TIDAW for each page boundary that the TIDAW list may cross
* due to it's own size.
*/
if (max_tidaws) {
cross_count = 1 + ((max_tidaws * sizeof(struct tidaw) - 1)
>> PAGE_SHIFT);
len += cross_count * sizeof(struct tidaw);
}
if (intrg_max_tidaws) {
cross_count = 1 + ((intrg_max_tidaws * sizeof(struct tidaw) - 1)
>> PAGE_SHIFT);
len += cross_count * sizeof(struct tidaw);
}
return len;
}
EXPORT_SYMBOL(itcw_calc_size);
@ -165,6 +181,7 @@ struct itcw *itcw_init(void *buffer, size_t size, int op, int intrg,
void *chunk;
addr_t start;
addr_t end;
int cross_count;
/* Check for 2G limit. */
start = (addr_t) buffer;
@ -177,8 +194,17 @@ struct itcw *itcw_init(void *buffer, size_t size, int op, int intrg,
if (IS_ERR(chunk))
return chunk;
itcw = chunk;
itcw->max_tidaws = max_tidaws;
itcw->intrg_max_tidaws = intrg_max_tidaws;
/* allow for TTIC tidaws that may be needed to cross a page boundary */
cross_count = 0;
if (max_tidaws)
cross_count = 1 + ((max_tidaws * sizeof(struct tidaw) - 1)
>> PAGE_SHIFT);
itcw->max_tidaws = max_tidaws + cross_count;
cross_count = 0;
if (intrg_max_tidaws)
cross_count = 1 + ((intrg_max_tidaws * sizeof(struct tidaw) - 1)
>> PAGE_SHIFT);
itcw->intrg_max_tidaws = intrg_max_tidaws + cross_count;
/* Main TCW. */
chunk = fit_chunk(&start, end, sizeof(struct tcw), 64, 0);
if (IS_ERR(chunk))
@ -198,7 +224,7 @@ struct itcw *itcw_init(void *buffer, size_t size, int op, int intrg,
/* Data TIDAL. */
if (max_tidaws > 0) {
chunk = fit_chunk(&start, end, sizeof(struct tidaw) *
max_tidaws, 16, 1);
itcw->max_tidaws, 16, 0);
if (IS_ERR(chunk))
return chunk;
tcw_set_data(itcw->tcw, chunk, 1);
@ -206,7 +232,7 @@ struct itcw *itcw_init(void *buffer, size_t size, int op, int intrg,
/* Interrogate data TIDAL. */
if (intrg && (intrg_max_tidaws > 0)) {
chunk = fit_chunk(&start, end, sizeof(struct tidaw) *
intrg_max_tidaws, 16, 1);
itcw->intrg_max_tidaws, 16, 0);
if (IS_ERR(chunk))
return chunk;
tcw_set_data(itcw->intrg_tcw, chunk, 1);
@ -283,13 +309,29 @@ EXPORT_SYMBOL(itcw_add_dcw);
* the new tidaw on success or -%ENOSPC if the new tidaw would exceed the
* available space.
*
* Note: the tidaw-list is assumed to be contiguous with no ttics. The
* last-tidaw flag for the last tidaw in the list will be set by itcw_finalize.
* Note: TTIC tidaws are automatically added when needed, so explicitly calling
* this interface with the TTIC flag is not supported. The last-tidaw flag
* for the last tidaw in the list will be set by itcw_finalize.
*/
struct tidaw *itcw_add_tidaw(struct itcw *itcw, u8 flags, void *addr, u32 count)
{
struct tidaw *following;
if (itcw->num_tidaws >= itcw->max_tidaws)
return ERR_PTR(-ENOSPC);
/*
* Is the tidaw, which follows the one we are about to fill, on the next
* page? Then we have to insert a TTIC tidaw first, that points to the
* tidaw on the new page.
*/
following = ((struct tidaw *) tcw_get_data(itcw->tcw))
+ itcw->num_tidaws + 1;
if (itcw->num_tidaws && !((unsigned long) following & ~PAGE_MASK)) {
tcw_add_tidaw(itcw->tcw, itcw->num_tidaws++,
TIDAW_FLAGS_TTIC, following, 0);
if (itcw->num_tidaws >= itcw->max_tidaws)
return ERR_PTR(-ENOSPC);
}
return tcw_add_tidaw(itcw->tcw, itcw->num_tidaws++, flags, addr, count);
}
EXPORT_SYMBOL(itcw_add_tidaw);

31
drivers/s390/cio/qdio.h
View file

@ -91,6 +91,12 @@ enum qdio_irq_states {
#define AC1_SC_QEBSM_AVAILABLE 0x02 /* available for subchannel */
#define AC1_SC_QEBSM_ENABLED 0x01 /* enabled for subchannel */
/* SIGA flags */
#define QDIO_SIGA_WRITE 0x00
#define QDIO_SIGA_READ 0x01
#define QDIO_SIGA_SYNC 0x02
#define QDIO_SIGA_QEBSM_FLAG 0x80
#ifdef CONFIG_64BIT
static inline int do_sqbs(u64 token, unsigned char state, int queue,
int *start, int *count)
@ -142,10 +148,9 @@ struct siga_flag {
u8 input:1;
u8 output:1;
u8 sync:1;
u8 no_sync_ti:1;
u8 no_sync_out_ti:1;
u8 no_sync_out_pci:1;
u8:2;
u8 sync_after_ai:1;
u8 sync_out_after_pci:1;
u8:3;
} __attribute__ ((packed));
struct chsc_ssqd_area {
@ -202,6 +207,7 @@ struct qdio_dev_perf_stat {
unsigned int inbound_queue_full;
unsigned int outbound_call;
unsigned int outbound_handler;
unsigned int outbound_queue_full;
unsigned int fast_requeue;
unsigned int target_full;
unsigned int eqbs;
@ -245,10 +251,10 @@ struct qdio_input_q {
struct qdio_output_q {
/* PCIs are enabled for the queue */
int pci_out_enabled;
/* IQDIO: output multiple buffers (enhanced SIGA) */
int use_enh_siga;
/* timer to check for more outbound work */
struct timer_list timer;
/* used SBALs before tasklet schedule */
int scan_threshold;
};
/*
@ -383,12 +389,13 @@ static inline int multicast_outbound(struct qdio_q *q)
(q->irq_ptr->qib.ac & QIB_AC_OUTBOUND_PCI_SUPPORTED)
#define is_qebsm(q) (q->irq_ptr->sch_token != 0)
#define need_siga_sync_thinint(q) (!q->irq_ptr->siga_flag.no_sync_ti)
#define need_siga_sync_out_thinint(q) (!q->irq_ptr->siga_flag.no_sync_out_ti)
#define need_siga_in(q) (q->irq_ptr->siga_flag.input)
#define need_siga_out(q) (q->irq_ptr->siga_flag.output)
#define need_siga_sync(q) (q->irq_ptr->siga_flag.sync)
#define siga_syncs_out_pci(q) (q->irq_ptr->siga_flag.no_sync_out_pci)
#define need_siga_sync(q) (unlikely(q->irq_ptr->siga_flag.sync))
#define need_siga_sync_after_ai(q) \
(unlikely(q->irq_ptr->siga_flag.sync_after_ai))
#define need_siga_sync_out_after_pci(q) \
(unlikely(q->irq_ptr->siga_flag.sync_out_after_pci))
#define for_each_input_queue(irq_ptr, q, i) \
for (i = 0, q = irq_ptr->input_qs[0]; \
@ -423,9 +430,9 @@ struct indicator_t {
extern struct indicator_t *q_indicators;
static inline int shared_ind(struct qdio_irq *irq_ptr)
static inline int shared_ind(u32 *dsci)
{
return irq_ptr->dsci == &q_indicators[TIQDIO_SHARED_IND].ind;
return dsci == &q_indicators[TIQDIO_SHARED_IND].ind;
}
/* prototypes for thin interrupt */

1
drivers/s390/cio/qdio_debug.c
View file

@ -151,6 +151,7 @@ static char *qperf_names[] = {
"Inbound queue full",
"Outbound calls",
"Outbound handler",
"Outbound queue full",
"Outbound fast_requeue",
"Outbound target_full",
"QEBSM eqbs",

177
drivers/s390/cio/qdio_main.c
View file

@ -14,6 +14,7 @@
#include <linux/timer.h>
#include <linux/delay.h>
#include <linux/gfp.h>
#include <linux/kernel_stat.h>
#include <asm/atomic.h>
#include <asm/debug.h>
#include <asm/qdio.h>
@ -29,11 +30,12 @@ MODULE_AUTHOR("Utz Bacher <utz.bacher@de.ibm.com>,"\
MODULE_DESCRIPTION("QDIO base support");
MODULE_LICENSE("GPL");
static inline int do_siga_sync(struct subchannel_id schid,
unsigned int out_mask, unsigned int in_mask)
static inline int do_siga_sync(unsigned long schid,
unsigned int out_mask, unsigned int in_mask,
unsigned int fc)
{
register unsigned long __fc asm ("0") = 2;
register struct subchannel_id __schid asm ("1") = schid;
register unsigned long __fc asm ("0") = fc;
register unsigned long __schid asm ("1") = schid;
register unsigned long out asm ("2") = out_mask;
register unsigned long in asm ("3") = in_mask;
int cc;
@ -47,10 +49,11 @@ static inline int do_siga_sync(struct subchannel_id schid,
return cc;
}
static inline int do_siga_input(struct subchannel_id schid, unsigned int mask)
static inline int do_siga_input(unsigned long schid, unsigned int mask,
unsigned int fc)
{
register unsigned long __fc asm ("0") = 1;
register struct subchannel_id __schid asm ("1") = schid;
register unsigned long __fc asm ("0") = fc;
register unsigned long __schid asm ("1") = schid;
register unsigned long __mask asm ("2") = mask;
int cc;
@ -279,16 +282,20 @@ void qdio_init_buf_states(struct qdio_irq *irq_ptr)
static inline int qdio_siga_sync(struct qdio_q *q, unsigned int output,
unsigned int input)
{
unsigned long schid = *((u32 *) &q->irq_ptr->schid);
unsigned int fc = QDIO_SIGA_SYNC;
int cc;
if (!need_siga_sync(q))
return 0;
DBF_DEV_EVENT(DBF_INFO, q->irq_ptr, "siga-s:%1d", q->nr);
qperf_inc(q, siga_sync);
cc = do_siga_sync(q->irq_ptr->schid, output, input);
if (cc)
if (is_qebsm(q)) {
schid = q->irq_ptr->sch_token;
fc |= QDIO_SIGA_QEBSM_FLAG;
}
cc = do_siga_sync(schid, output, input, fc);
if (unlikely(cc))
DBF_ERROR("%4x SIGA-S:%2d", SCH_NO(q), cc);
return cc;
}
@ -301,38 +308,22 @@ static inline int qdio_siga_sync_q(struct qdio_q *q)
return qdio_siga_sync(q, q->mask, 0);
}
static inline int qdio_siga_sync_out(struct qdio_q *q)
{
return qdio_siga_sync(q, ~0U, 0);
}
static inline int qdio_siga_sync_all(struct qdio_q *q)
{
return qdio_siga_sync(q, ~0U, ~0U);
}
static int qdio_siga_output(struct qdio_q *q, unsigned int *busy_bit)
{
unsigned long schid;
unsigned int fc = 0;
unsigned long schid = *((u32 *) &q->irq_ptr->schid);
unsigned int fc = QDIO_SIGA_WRITE;
u64 start_time = 0;
int cc;
if (q->u.out.use_enh_siga)
fc = 3;
if (is_qebsm(q)) {
schid = q->irq_ptr->sch_token;
fc |= 0x80;
fc |= QDIO_SIGA_QEBSM_FLAG;
}
else
schid = *((u32 *)&q->irq_ptr->schid);
again:
cc = do_siga_output(schid, q->mask, busy_bit, fc);
/* hipersocket busy condition */
if (*busy_bit) {
if (unlikely(*busy_bit)) {
WARN_ON(queue_type(q) != QDIO_IQDIO_QFMT || cc != 2);
if (!start_time) {
@ -347,32 +338,41 @@ static int qdio_siga_output(struct qdio_q *q, unsigned int *busy_bit)
static inline int qdio_siga_input(struct qdio_q *q)
{
unsigned long schid = *((u32 *) &q->irq_ptr->schid);
unsigned int fc = QDIO_SIGA_READ;
int cc;
DBF_DEV_EVENT(DBF_INFO, q->irq_ptr, "siga-r:%1d", q->nr);
qperf_inc(q, siga_read);
cc = do_siga_input(q->irq_ptr->schid, q->mask);
if (cc)
if (is_qebsm(q)) {
schid = q->irq_ptr->sch_token;
fc |= QDIO_SIGA_QEBSM_FLAG;
}
cc = do_siga_input(schid, q->mask, fc);
if (unlikely(cc))
DBF_ERROR("%4x SIGA-R:%2d", SCH_NO(q), cc);
return cc;
}
static inline void qdio_sync_after_thinint(struct qdio_q *q)
#define qdio_siga_sync_out(q) qdio_siga_sync(q, ~0U, 0)
#define qdio_siga_sync_all(q) qdio_siga_sync(q, ~0U, ~0U)
static inline void qdio_sync_queues(struct qdio_q *q)
{
if (pci_out_supported(q)) {
if (need_siga_sync_thinint(q))
qdio_siga_sync_all(q);
else if (need_siga_sync_out_thinint(q))
qdio_siga_sync_out(q);
} else
/* PCI capable outbound queues will also be scanned so sync them too */
if (pci_out_supported(q))
qdio_siga_sync_all(q);
else
qdio_siga_sync_q(q);
}
int debug_get_buf_state(struct qdio_q *q, unsigned int bufnr,
unsigned char *state)
{
qdio_siga_sync_q(q);
if (need_siga_sync(q))
qdio_siga_sync_q(q);
return get_buf_states(q, bufnr, state, 1, 0);
}
@ -549,7 +549,8 @@ static inline int qdio_inbound_q_done(struct qdio_q *q)
if (!atomic_read(&q->nr_buf_used))
return 1;
qdio_siga_sync_q(q);
if (need_siga_sync(q))
qdio_siga_sync_q(q);
get_buf_state(q, q->first_to_check, &state, 0);
if (state == SLSB_P_INPUT_PRIMED || state == SLSB_P_INPUT_ERROR)
@ -644,9 +645,12 @@ static int get_outbound_buffer_frontier(struct qdio_q *q)
int count, stop;
unsigned char state;
if (((queue_type(q) != QDIO_IQDIO_QFMT) && !pci_out_supported(q)) ||
(queue_type(q) == QDIO_IQDIO_QFMT && multicast_outbound(q)))
qdio_siga_sync_q(q);
if (need_siga_sync(q))
if (((queue_type(q) != QDIO_IQDIO_QFMT) &&
!pci_out_supported(q)) ||
(queue_type(q) == QDIO_IQDIO_QFMT &&
multicast_outbound(q)))
qdio_siga_sync_q(q);
/*
* Don't check 128 buffers, as otherwise qdio_inbound_q_moved
@ -818,7 +822,8 @@ static inline void qdio_check_outbound_after_thinint(struct qdio_q *q)
static void __tiqdio_inbound_processing(struct qdio_q *q)
{
qperf_inc(q, tasklet_inbound);
qdio_sync_after_thinint(q);
if (need_siga_sync(q) && need_siga_sync_after_ai(q))
qdio_sync_queues(q);
/*
* The interrupt could be caused by a PCI request. Check the
@ -898,16 +903,14 @@ static void qdio_int_handler_pci(struct qdio_irq *irq_ptr)
tasklet_schedule(&q->tasklet);
}
if (!(irq_ptr->qib.ac & QIB_AC_OUTBOUND_PCI_SUPPORTED))
if (!pci_out_supported(q))
return;
for_each_output_queue(irq_ptr, q, i) {
if (qdio_outbound_q_done(q))
continue;
if (!siga_syncs_out_pci(q))
if (need_siga_sync(q) && need_siga_sync_out_after_pci(q))
qdio_siga_sync_q(q);
tasklet_schedule(&q->tasklet);
}
}
@ -970,6 +973,7 @@ void qdio_int_handler(struct ccw_device *cdev, unsigned long intparm,
return;
}
kstat_cpu(smp_processor_id()).irqs[IOINT_QDI]++;
if (irq_ptr->perf_stat_enabled)
irq_ptr->perf_stat.qdio_int++;
@ -1273,7 +1277,6 @@ int qdio_establish(struct qdio_initialize *init_data)
}
qdio_setup_ssqd_info(irq_ptr);
DBF_EVENT("qDmmwc:%2x", irq_ptr->ssqd_desc.mmwc);
DBF_EVENT("qib ac:%4x", irq_ptr->qib.ac);
/* qebsm is now setup if available, initialize buffer states */
@ -1445,52 +1448,38 @@ static int handle_outbound(struct qdio_q *q, unsigned int callflags,
used = atomic_add_return(count, &q->nr_buf_used);
BUG_ON(used > QDIO_MAX_BUFFERS_PER_Q);
if (used == QDIO_MAX_BUFFERS_PER_Q)
qperf_inc(q, outbound_queue_full);
if (callflags & QDIO_FLAG_PCI_OUT) {
q->u.out.pci_out_enabled = 1;
qperf_inc(q, pci_request_int);
}
else
} else
q->u.out.pci_out_enabled = 0;
if (queue_type(q) == QDIO_IQDIO_QFMT) {
if (multicast_outbound(q))
/* One SIGA-W per buffer required for unicast HiperSockets. */
WARN_ON_ONCE(count > 1 && !multicast_outbound(q));
rc = qdio_kick_outbound_q(q);
} else if (need_siga_sync(q)) {
rc = qdio_siga_sync_q(q);
} else {
/* try to fast requeue buffers */
get_buf_state(q, prev_buf(bufnr), &state, 0);
if (state != SLSB_CU_OUTPUT_PRIMED)
rc = qdio_kick_outbound_q(q);
else
if ((q->irq_ptr->ssqd_desc.mmwc > 1) &&
(count > 1) &&
(count <= q->irq_ptr->ssqd_desc.mmwc)) {
/* exploit enhanced SIGA */
q->u.out.use_enh_siga = 1;
rc = qdio_kick_outbound_q(q);
} else {
/*
* One siga-w per buffer required for unicast
* HiperSockets.
*/
q->u.out.use_enh_siga = 0;
while (count--) {
rc = qdio_kick_outbound_q(q);
if (rc)
goto out;
}
}
goto out;
qperf_inc(q, fast_requeue);
}
if (need_siga_sync(q)) {
qdio_siga_sync_q(q);
goto out;
}
/* try to fast requeue buffers */
get_buf_state(q, prev_buf(bufnr), &state, 0);
if (state != SLSB_CU_OUTPUT_PRIMED)
rc = qdio_kick_outbound_q(q);
/* in case of SIGA errors we must process the error immediately */
if (used >= q->u.out.scan_threshold || rc)
tasklet_schedule(&q->tasklet);
else
qperf_inc(q, fast_requeue);
out:
tasklet_schedule(&q->tasklet);
/* free the SBALs in case of no further traffic */
if (!timer_pending(&q->u.out.timer))
mod_timer(&q->u.out.timer, jiffies + HZ);
return rc;
}
@ -1550,7 +1539,7 @@ int qdio_start_irq(struct ccw_device *cdev, int nr)
WARN_ON(queue_irqs_enabled(q));
if (!shared_ind(q->irq_ptr))
if (!shared_ind(q->irq_ptr->dsci))
xchg(q->irq_ptr->dsci, 0);
qdio_stop_polling(q);
@ -1560,7 +1549,7 @@ int qdio_start_irq(struct ccw_device *cdev, int nr)
* We need to check again to not lose initiative after
* resetting the ACK state.
*/
if (!shared_ind(q->irq_ptr) && *q->irq_ptr->dsci)
if (!shared_ind(q->irq_ptr->dsci) && *q->irq_ptr->dsci)
goto rescan;
if (!qdio_inbound_q_done(q))
goto rescan;
@ -1600,12 +1589,14 @@ int qdio_get_next_buffers(struct ccw_device *cdev, int nr, int *bufnr,
q = irq_ptr->input_qs[nr];
WARN_ON(queue_irqs_enabled(q));
qdio_sync_after_thinint(q);
/*
* The interrupt could be caused by a PCI request. Check the
* PCI capable outbound queues.
* Cannot rely on automatic sync after interrupt since queues may
* also be examined without interrupt.
*/
if (need_siga_sync(q))
qdio_sync_queues(q);
/* check the PCI capable outbound queues. */
qdio_check_outbound_after_thinint(q);
if (!qdio_inbound_q_moved(q))

20
drivers/s390/cio/qdio_setup.c
View file

@ -178,6 +178,7 @@ static void setup_queues(struct qdio_irq *irq_ptr,
setup_queues_misc(q, irq_ptr, qdio_init->output_handler, i);
q->is_input_q = 0;
q->u.out.scan_threshold = qdio_init->scan_threshold;
setup_storage_lists(q, irq_ptr, output_sbal_array, i);
output_sbal_array += QDIO_MAX_BUFFERS_PER_Q;
@ -196,14 +197,10 @@ static void process_ac_flags(struct qdio_irq *irq_ptr, unsigned char qdioac)
irq_ptr->siga_flag.output = 1;
if (qdioac & AC1_SIGA_SYNC_NEEDED)
irq_ptr->siga_flag.sync = 1;
if (qdioac & AC1_AUTOMATIC_SYNC_ON_THININT)
irq_ptr->siga_flag.no_sync_ti = 1;
if (qdioac & AC1_AUTOMATIC_SYNC_ON_OUT_PCI)
irq_ptr->siga_flag.no_sync_out_pci = 1;
if (irq_ptr->siga_flag.no_sync_out_pci &&
irq_ptr->siga_flag.no_sync_ti)
irq_ptr->siga_flag.no_sync_out_ti = 1;
if (!(qdioac & AC1_AUTOMATIC_SYNC_ON_THININT))
irq_ptr->siga_flag.sync_after_ai = 1;
if (!(qdioac & AC1_AUTOMATIC_SYNC_ON_OUT_PCI))
irq_ptr->siga_flag.sync_out_after_pci = 1;
}
static void check_and_setup_qebsm(struct qdio_irq *irq_ptr,
@ -451,7 +448,7 @@ void qdio_print_subchannel_info(struct qdio_irq *irq_ptr,
char s[80];
snprintf(s, 80, "qdio: %s %s on SC %x using "
"AI:%d QEBSM:%d PCI:%d TDD:%d SIGA:%s%s%s%s%s%s\n",
"AI:%d QEBSM:%d PCI:%d TDD:%d SIGA:%s%s%s%s%s\n",
dev_name(&cdev->dev),
(irq_ptr->qib.qfmt == QDIO_QETH_QFMT) ? "OSA" :
((irq_ptr->qib.qfmt == QDIO_ZFCP_QFMT) ? "ZFCP" : "HS"),
@ -463,9 +460,8 @@ void qdio_print_subchannel_info(struct qdio_irq *irq_ptr,
(irq_ptr->siga_flag.input) ? "R" : " ",
(irq_ptr->siga_flag.output) ? "W" : " ",
(irq_ptr->siga_flag.sync) ? "S" : " ",
(!irq_ptr->siga_flag.no_sync_ti) ? "A" : " ",
(!irq_ptr->siga_flag.no_sync_out_ti) ? "O" : " ",
(!irq_ptr->siga_flag.no_sync_out_pci) ? "P" : " ");
(irq_ptr->siga_flag.sync_after_ai) ? "A" : " ",
(irq_ptr->siga_flag.sync_out_after_pci) ? "P" : " ");
printk(KERN_INFO "%s", s);
}

56
drivers/s390/cio/qdio_thinint.c
View file

@ -8,6 +8,7 @@
*/
#include <linux/io.h>
#include <linux/slab.h>
#include <linux/kernel_stat.h>
#include <asm/atomic.h>
#include <asm/debug.h>
#include <asm/qdio.h>
@ -35,22 +36,8 @@ static u8 *tiqdio_alsi;
struct indicator_t *q_indicators;
static int css_qdio_omit_svs;
static u64 last_ai_time;
static inline unsigned long do_clear_global_summary(void)
{
register unsigned long __fn asm("1") = 3;
register unsigned long __tmp asm("2");
register unsigned long __time asm("3");
asm volatile(
" .insn rre,0xb2650000,2,0"
: "+d" (__fn), "=d" (__tmp), "=d" (__time));
return __time;
}
/* returns addr for the device state change indicator */
static u32 *get_indicator(void)
{
@ -83,10 +70,6 @@ void tiqdio_add_input_queues(struct qdio_irq *irq_ptr)
struct qdio_q *q;
int i;
/* No TDD facility? If we must use SIGA-s we can also omit SVS. */
if (!css_qdio_omit_svs && irq_ptr->siga_flag.sync)
css_qdio_omit_svs = 1;
mutex_lock(&tiq_list_lock);
for_each_input_queue(irq_ptr, q, i)
list_add_rcu(&q->entry, &tiq_list);
@ -112,9 +95,9 @@ void tiqdio_remove_input_queues(struct qdio_irq *irq_ptr)
}
}
static inline int shared_ind_used(void)
static inline u32 shared_ind_set(void)
{
return atomic_read(&q_indicators[TIQDIO_SHARED_IND].count);
return q_indicators[TIQDIO_SHARED_IND].ind;
}
/**
@ -124,20 +107,11 @@ static inline int shared_ind_used(void)
*/
static void tiqdio_thinint_handler(void *alsi, void *data)
{
u32 si_used = shared_ind_set();
struct qdio_q *q;
last_ai_time = S390_lowcore.int_clock;
/*
* SVS only when needed: issue SVS to benefit from iqdio interrupt
* avoidance (SVS clears adapter interrupt suppression overwrite).
*/
if (!css_qdio_omit_svs)
do_clear_global_summary();
/* reset local summary indicator */
if (shared_ind_used())
xchg(tiqdio_alsi, 0);
kstat_cpu(smp_processor_id()).irqs[IOINT_QAI]++;
/* protect tiq_list entries, only changed in activate or shutdown */
rcu_read_lock();
@ -146,7 +120,10 @@ static void tiqdio_thinint_handler(void *alsi, void *data)
list_for_each_entry_rcu(q, &tiq_list, entry) {
/* only process queues from changed sets */
if (!*q->irq_ptr->dsci)
if (unlikely(shared_ind(q->irq_ptr->dsci))) {
if (!si_used)
continue;
} else if (!*q->irq_ptr->dsci)
continue;
if (q->u.in.queue_start_poll) {
@ -162,7 +139,7 @@ static void tiqdio_thinint_handler(void *alsi, void *data)
q->irq_ptr->int_parm);
} else {
/* only clear it if the indicator is non-shared */
if (!shared_ind(q->irq_ptr))
if (!shared_ind(q->irq_ptr->dsci))
xchg(q->irq_ptr->dsci, 0);
/*
* Call inbound processing but not directly
@ -178,13 +155,8 @@ static void tiqdio_thinint_handler(void *alsi, void *data)
* If the shared indicator was used clear it now after all queues
* were processed.
*/
if (shared_ind_used()) {
if (si_used && shared_ind_set())
xchg(&q_indicators[TIQDIO_SHARED_IND].ind, 0);
/* prevent racing */
if (*tiqdio_alsi)
xchg(&q_indicators[TIQDIO_SHARED_IND].ind, 1 << 7);
}
}
static int set_subchannel_ind(struct qdio_irq *irq_ptr, int reset)
@ -269,12 +241,6 @@ int qdio_establish_thinint(struct qdio_irq *irq_ptr)
{
if (!is_thinint_irq(irq_ptr))
return 0;
/* Check for aif time delay disablement. If installed,
* omit SVS even under LPAR
*/
if (css_general_characteristics.aif_tdd)
css_qdio_omit_svs = 1;
return set_subchannel_ind(irq_ptr, 0);
}

67
drivers/s390/crypto/ap_bus.c
View file

@ -27,6 +27,7 @@
#define KMSG_COMPONENT "ap"
#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
#include <linux/kernel_stat.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/delay.h>
@ -154,7 +155,7 @@ static inline int ap_instructions_available(void)
*/
static int ap_interrupts_available(void)
{
return test_facility(1) && test_facility(2);
return test_facility(2) && test_facility(65);
}
/**
@ -221,6 +222,69 @@ ap_queue_interruption_control(ap_qid_t qid, void *ind)
}
#endif
static inline struct ap_queue_status __ap_4096_commands_available(ap_qid_t qid,
int *support)
{
register unsigned long reg0 asm ("0") = 0UL | qid | (1UL << 23);
register struct ap_queue_status reg1 asm ("1");
register unsigned long reg2 asm ("2") = 0UL;
asm volatile(
".long 0xb2af0000\n"
"0: la %1,0\n"
"1:\n"
EX_TABLE(0b, 1b)
: "+d" (reg0), "=d" (reg1), "=d" (reg2)
:
: "cc");
if (reg2 & 0x6000000000000000ULL)
*support = 1;
else
*support = 0;
return reg1;
}
/**
* ap_4096_commands_availablen(): Check for availability of 4096 bit RSA
* support.
* @qid: The AP queue number
*
* Returns 1 if 4096 bit RSA keys are support fo the AP, returns 0 if not.
*/
int ap_4096_commands_available(ap_qid_t qid)
{
struct ap_queue_status status;
int i, support = 0;
status = __ap_4096_commands_available(qid, &support);
for (i = 0; i < AP_MAX_RESET; i++) {
switch (status.response_code) {
case AP_RESPONSE_NORMAL:
return support;
case AP_RESPONSE_RESET_IN_PROGRESS:
case AP_RESPONSE_BUSY:
break;
case AP_RESPONSE_Q_NOT_AVAIL:
case AP_RESPONSE_DECONFIGURED:
case AP_RESPONSE_CHECKSTOPPED:
case AP_RESPONSE_INVALID_ADDRESS:
return 0;
case AP_RESPONSE_OTHERWISE_CHANGED:
break;
default:
break;
}
if (i < AP_MAX_RESET - 1) {
udelay(5);
status = __ap_4096_commands_available(qid, &support);
}
}
return support;
}
EXPORT_SYMBOL(ap_4096_commands_available);
/**
* ap_queue_enable_interruption(): Enable interruption on an AP.
* @qid: The AP queue number
@ -1042,6 +1106,7 @@ static int ap_probe_device_type(struct ap_device *ap_dev)
static void ap_interrupt_handler(void *unused1, void *unused2)
{
kstat_cpu(smp_processor_id()).irqs[IOINT_APB]++;
tasklet_schedule(&ap_tasklet);
}

2
drivers/s390/crypto/ap_bus.h
View file

@ -196,4 +196,6 @@ void ap_flush_queue(struct ap_device *ap_dev);
int ap_module_init(void);
void ap_module_exit(void);
int ap_4096_commands_available(ap_qid_t qid);
#endif /* _AP_BUS_H_ */

12
drivers/s390/crypto/zcrypt_api.c
View file

@ -396,8 +396,15 @@ static long zcrypt_rsa_crt(struct ica_rsa_modexpo_crt *crt)
if (copied == 0) {
unsigned int len;
spin_unlock_bh(&zcrypt_device_lock);
/* len is max 256 / 2 - 120 = 8 */
len = crt->inputdatalength / 2 - 120;
/* len is max 256 / 2 - 120 = 8
* For bigger device just assume len of leading
* 0s is 8 as stated in the requirements for
* ica_rsa_modexpo_crt struct in zcrypt.h.
*/
if (crt->inputdatalength <= 256)
len = crt->inputdatalength / 2 - 120;
else
len = 8;
if (len > sizeof(z1))
return -EFAULT;
z1 = z2 = z3 = 0;
@ -405,6 +412,7 @@ static long zcrypt_rsa_crt(struct ica_rsa_modexpo_crt *crt)
copy_from_user(&z2, crt->bp_key, len) ||
copy_from_user(&z3, crt->u_mult_inv, len))
return -EFAULT;
z1 = z2 = z3 = 0;
copied = 1;
/*
* We have to restart device lookup -

1
drivers/s390/crypto/zcrypt_api.h
View file

@ -109,6 +109,7 @@ struct zcrypt_device {
int request_count; /* # current requests. */
struct ap_message reply; /* Per-device reply structure. */
int max_exp_bit_length;
};
struct zcrypt_device *zcrypt_device_alloc(size_t);

82
drivers/s390/crypto/zcrypt_cex2a.c
View file

@ -41,7 +41,7 @@
#define CEX2A_MIN_MOD_SIZE 1 /* 8 bits */
#define CEX2A_MAX_MOD_SIZE 256 /* 2048 bits */
#define CEX3A_MIN_MOD_SIZE CEX2A_MIN_MOD_SIZE
#define CEX3A_MAX_MOD_SIZE CEX2A_MAX_MOD_SIZE
#define CEX3A_MAX_MOD_SIZE 512 /* 4096 bits */
#define CEX2A_SPEED_RATING 970
#define CEX3A_SPEED_RATING 900 /* Fixme: Needs finetuning */
@ -49,8 +49,10 @@
#define CEX2A_MAX_MESSAGE_SIZE 0x390 /* sizeof(struct type50_crb2_msg) */
#define CEX2A_MAX_RESPONSE_SIZE 0x110 /* max outputdatalength + type80_hdr */
#define CEX3A_MAX_MESSAGE_SIZE CEX2A_MAX_MESSAGE_SIZE
#define CEX3A_MAX_RESPONSE_SIZE CEX2A_MAX_RESPONSE_SIZE
#define CEX3A_MAX_RESPONSE_SIZE 0x210 /* 512 bit modulus
* (max outputdatalength) +
* type80_hdr*/
#define CEX3A_MAX_MESSAGE_SIZE sizeof(struct type50_crb3_msg)
#define CEX2A_CLEANUP_TIME (15*HZ)
#define CEX3A_CLEANUP_TIME CEX2A_CLEANUP_TIME
@ -110,7 +112,7 @@ static int ICAMEX_msg_to_type50MEX_msg(struct zcrypt_device *zdev,
mod = meb1->modulus + sizeof(meb1->modulus) - mod_len;
exp = meb1->exponent + sizeof(meb1->exponent) - mod_len;
inp = meb1->message + sizeof(meb1->message) - mod_len;
} else {
} else if (mod_len <= 256) {
struct type50_meb2_msg *meb2 = ap_msg->message;
memset(meb2, 0, sizeof(*meb2));
ap_msg->length = sizeof(*meb2);
@ -120,6 +122,17 @@ static int ICAMEX_msg_to_type50MEX_msg(struct zcrypt_device *zdev,
mod = meb2->modulus + sizeof(meb2->modulus) - mod_len;
exp = meb2->exponent + sizeof(meb2->exponent) - mod_len;
inp = meb2->message + sizeof(meb2->message) - mod_len;
} else {
/* mod_len > 256 = 4096 bit RSA Key */
struct type50_meb3_msg *meb3 = ap_msg->message;
memset(meb3, 0, sizeof(*meb3));
ap_msg->length = sizeof(*meb3);
meb3->header.msg_type_code = TYPE50_TYPE_CODE;
meb3->header.msg_len = sizeof(*meb3);
meb3->keyblock_type = TYPE50_MEB3_FMT;
mod = meb3->modulus + sizeof(meb3->modulus) - mod_len;
exp = meb3->exponent + sizeof(meb3->exponent) - mod_len;
inp = meb3->message + sizeof(meb3->message) - mod_len;
}
if (copy_from_user(mod, mex->n_modulus, mod_len) ||
@ -142,7 +155,7 @@ static int ICACRT_msg_to_type50CRT_msg(struct zcrypt_device *zdev,
struct ap_message *ap_msg,
struct ica_rsa_modexpo_crt *crt)
{
int mod_len, short_len, long_len, long_offset;
int mod_len, short_len, long_len, long_offset, limit;
unsigned char *p, *q, *dp, *dq, *u, *inp;
mod_len = crt->inputdatalength;
@ -152,14 +165,20 @@ static int ICACRT_msg_to_type50CRT_msg(struct zcrypt_device *zdev,
/*
* CEX2A cannot handle p, dp, or U > 128 bytes.
* If we have one of these, we need to do extra checking.
* For CEX3A the limit is 256 bytes.
*/
if (long_len > 128) {
if (zdev->max_mod_size == CEX3A_MAX_MOD_SIZE)
limit = 256;
else
limit = 128;
if (long_len > limit) {
/*
* zcrypt_rsa_crt already checked for the leading
* zeroes of np_prime, bp_key and u_mult_inc.
*/
long_offset = long_len - 128;
long_len = 128;
long_offset = long_len - limit;
long_len = limit;
} else
long_offset = 0;
@ -180,7 +199,7 @@ static int ICACRT_msg_to_type50CRT_msg(struct zcrypt_device *zdev,
dq = crb1->dq + sizeof(crb1->dq) - short_len;
u = crb1->u + sizeof(crb1->u) - long_len;
inp = crb1->message + sizeof(crb1->message) - mod_len;
} else {
} else if (long_len <= 128) {
struct type50_crb2_msg *crb2 = ap_msg->message;
memset(crb2, 0, sizeof(*crb2));
ap_msg->length = sizeof(*crb2);
@ -193,6 +212,20 @@ static int ICACRT_msg_to_type50CRT_msg(struct zcrypt_device *zdev,
dq = crb2->dq + sizeof(crb2->dq) - short_len;
u = crb2->u + sizeof(crb2->u) - long_len;
inp = crb2->message + sizeof(crb2->message) - mod_len;
} else {
/* long_len >= 256 */
struct type50_crb3_msg *crb3 = ap_msg->message;
memset(crb3, 0, sizeof(*crb3));
ap_msg->length = sizeof(*crb3);
crb3->header.msg_type_code = TYPE50_TYPE_CODE;
crb3->header.msg_len = sizeof(*crb3);
crb3->keyblock_type = TYPE50_CRB3_FMT;
p = crb3->p + sizeof(crb3->p) - long_len;
q = crb3->q + sizeof(crb3->q) - short_len;
dp = crb3->dp + sizeof(crb3->dp) - long_len;
dq = crb3->dq + sizeof(crb3->dq) - short_len;
u = crb3->u + sizeof(crb3->u) - long_len;
inp = crb3->message + sizeof(crb3->message) - mod_len;
}
if (copy_from_user(p, crt->np_prime + long_offset, long_len) ||
@ -203,7 +236,6 @@ static int ICACRT_msg_to_type50CRT_msg(struct zcrypt_device *zdev,
copy_from_user(inp, crt->inputdata, mod_len))
return -EFAULT;
return 0;
}
@ -230,7 +262,10 @@ static int convert_type80(struct zcrypt_device *zdev,
zdev->online = 0;
return -EAGAIN; /* repeat the request on a different device. */
}
BUG_ON(t80h->len > CEX2A_MAX_RESPONSE_SIZE);
if (zdev->user_space_type == ZCRYPT_CEX2A)
BUG_ON(t80h->len > CEX2A_MAX_RESPONSE_SIZE);
else
BUG_ON(t80h->len > CEX3A_MAX_RESPONSE_SIZE);
data = reply->message + t80h->len - outputdatalength;
if (copy_to_user(outputdata, data, outputdatalength))
return -EFAULT;
@ -282,7 +317,10 @@ static void zcrypt_cex2a_receive(struct ap_device *ap_dev,
}
t80h = reply->message;
if (t80h->type == TYPE80_RSP_CODE) {
length = min(CEX2A_MAX_RESPONSE_SIZE, (int) t80h->len);
if (ap_dev->device_type == AP_DEVICE_TYPE_CEX2A)
length = min(CEX2A_MAX_RESPONSE_SIZE, (int) t80h->len);
else
length = min(CEX3A_MAX_RESPONSE_SIZE, (int) t80h->len);
memcpy(msg->message, reply->message, length);
} else
memcpy(msg->message, reply->message, sizeof error_reply);
@ -307,7 +345,10 @@ static long zcrypt_cex2a_modexpo(struct zcrypt_device *zdev,
int rc;
ap_init_message(&ap_msg);
ap_msg.message = kmalloc(CEX2A_MAX_MESSAGE_SIZE, GFP_KERNEL);
if (zdev->user_space_type == ZCRYPT_CEX2A)
ap_msg.message = kmalloc(CEX2A_MAX_MESSAGE_SIZE, GFP_KERNEL);
else
ap_msg.message = kmalloc(CEX3A_MAX_MESSAGE_SIZE, GFP_KERNEL);
if (!ap_msg.message)
return -ENOMEM;
ap_msg.psmid = (((unsigned long long) current->pid) << 32) +
@ -345,7 +386,10 @@ static long zcrypt_cex2a_modexpo_crt(struct zcrypt_device *zdev,
int rc;
ap_init_message(&ap_msg);
ap_msg.message = kmalloc(CEX2A_MAX_MESSAGE_SIZE, GFP_KERNEL);
if (zdev->user_space_type == ZCRYPT_CEX2A)
ap_msg.message = kmalloc(CEX2A_MAX_MESSAGE_SIZE, GFP_KERNEL);
else
ap_msg.message = kmalloc(CEX3A_MAX_MESSAGE_SIZE, GFP_KERNEL);
if (!ap_msg.message)
return -ENOMEM;
ap_msg.psmid = (((unsigned long long) current->pid) << 32) +
@ -397,6 +441,7 @@ static int zcrypt_cex2a_probe(struct ap_device *ap_dev)
zdev->max_mod_size = CEX2A_MAX_MOD_SIZE;
zdev->short_crt = 1;
zdev->speed_rating = CEX2A_SPEED_RATING;
zdev->max_exp_bit_length = CEX2A_MAX_MOD_SIZE;
break;
case AP_DEVICE_TYPE_CEX3A:
zdev = zcrypt_device_alloc(CEX3A_MAX_RESPONSE_SIZE);
@ -404,8 +449,13 @@ static int zcrypt_cex2a_probe(struct ap_device *ap_dev)
return -ENOMEM;
zdev->user_space_type = ZCRYPT_CEX3A;
zdev->type_string = "CEX3A";
zdev->min_mod_size = CEX3A_MIN_MOD_SIZE;
zdev->max_mod_size = CEX3A_MAX_MOD_SIZE;
zdev->min_mod_size = CEX2A_MIN_MOD_SIZE;
zdev->max_mod_size = CEX2A_MAX_MOD_SIZE;
zdev->max_exp_bit_length = CEX2A_MAX_MOD_SIZE;
if (ap_4096_commands_available(ap_dev->qid)) {
zdev->max_mod_size = CEX3A_MAX_MOD_SIZE;
zdev->max_exp_bit_length = CEX3A_MAX_MOD_SIZE;
}
zdev->short_crt = 1;
zdev->speed_rating = CEX3A_SPEED_RATING;
break;

25
drivers/s390/crypto/zcrypt_cex2a.h
View file

@ -51,8 +51,10 @@ struct type50_hdr {
#define TYPE50_MEB1_FMT 0x0001
#define TYPE50_MEB2_FMT 0x0002
#define TYPE50_MEB3_FMT 0x0003
#define TYPE50_CRB1_FMT 0x0011
#define TYPE50_CRB2_FMT 0x0012
#define TYPE50_CRB3_FMT 0x0013
/* Mod-Exp, with a small modulus */
struct type50_meb1_msg {
@ -74,6 +76,16 @@ struct type50_meb2_msg {
unsigned char message[256];
} __attribute__((packed));
/* Mod-Exp, with a larger modulus */
struct type50_meb3_msg {
struct type50_hdr header;
unsigned short keyblock_type; /* 0x0003 */
unsigned char reserved[6];
unsigned char exponent[512];
unsigned char modulus[512];
unsigned char message[512];
} __attribute__((packed));
/* CRT, with a small modulus */
struct type50_crb1_msg {
struct type50_hdr header;
@ -100,6 +112,19 @@ struct type50_crb2_msg {
unsigned char message[256];
} __attribute__((packed));
/* CRT, with a larger modulus */
struct type50_crb3_msg {
struct type50_hdr header;
unsigned short keyblock_type; /* 0x0013 */
unsigned char reserved[6];
unsigned char p[256];
unsigned char q[256];
unsigned char dp[256];
unsigned char dq[256];
unsigned char u[256];
unsigned char message[512];
} __attribute__((packed));
/**
* The type 80 response family is associated with a CEX2A card.
*

1
drivers/s390/crypto/zcrypt_pcica.c
View file

@ -373,6 +373,7 @@ static int zcrypt_pcica_probe(struct ap_device *ap_dev)
zdev->min_mod_size = PCICA_MIN_MOD_SIZE;
zdev->max_mod_size = PCICA_MAX_MOD_SIZE;
zdev->speed_rating = PCICA_SPEED_RATING;
zdev->max_exp_bit_length = PCICA_MAX_MOD_SIZE;
ap_dev->reply = &zdev->reply;
ap_dev->private = zdev;
rc = zcrypt_device_register(zdev);

1
drivers/s390/crypto/zcrypt_pcicc.c
View file

@ -579,6 +579,7 @@ static int zcrypt_pcicc_probe(struct ap_device *ap_dev)
zdev->min_mod_size = PCICC_MIN_MOD_SIZE;
zdev->max_mod_size = PCICC_MAX_MOD_SIZE;
zdev->speed_rating = PCICC_SPEED_RATING;
zdev->max_exp_bit_length = PCICC_MAX_MOD_SIZE;
ap_dev->reply = &zdev->reply;
ap_dev->private = zdev;
rc = zcrypt_device_register(zdev);

17
drivers/s390/crypto/zcrypt_pcixcc.c
View file

@ -45,12 +45,12 @@
#define PCIXCC_MIN_MOD_SIZE_OLD 64 /* 512 bits */
#define PCIXCC_MAX_MOD_SIZE 256 /* 2048 bits */
#define CEX3C_MIN_MOD_SIZE PCIXCC_MIN_MOD_SIZE
#define CEX3C_MAX_MOD_SIZE PCIXCC_MAX_MOD_SIZE
#define CEX3C_MAX_MOD_SIZE 512 /* 4096 bits */
#define PCIXCC_MCL2_SPEED_RATING 7870
#define PCIXCC_MCL3_SPEED_RATING 7870
#define CEX2C_SPEED_RATING 7000
#define CEX3C_SPEED_RATING 6500 /* FIXME: needs finetuning */
#define CEX3C_SPEED_RATING 6500
#define PCIXCC_MAX_ICA_MESSAGE_SIZE 0x77c /* max size type6 v2 crt message */
#define PCIXCC_MAX_ICA_RESPONSE_SIZE 0x77c /* max size type86 v2 reply */
@ -567,6 +567,15 @@ static int convert_response_ica(struct zcrypt_device *zdev,
case TYPE88_RSP_CODE:
return convert_error(zdev, reply);
case TYPE86_RSP_CODE:
if (msg->cprbx.ccp_rtcode &&
(msg->cprbx.ccp_rscode == 0x14f) &&
(outputdatalength > 256)) {
if (zdev->max_exp_bit_length <= 17) {
zdev->max_exp_bit_length = 17;
return -EAGAIN;
} else
return -EINVAL;
}
if (msg->hdr.reply_code)
return convert_error(zdev, reply);
if (msg->cprbx.cprb_ver_id == 0x02)
@ -1052,11 +1061,13 @@ static int zcrypt_pcixcc_probe(struct ap_device *ap_dev)
zdev->speed_rating = PCIXCC_MCL2_SPEED_RATING;
zdev->min_mod_size = PCIXCC_MIN_MOD_SIZE_OLD;
zdev->max_mod_size = PCIXCC_MAX_MOD_SIZE;
zdev->max_exp_bit_length = PCIXCC_MAX_MOD_SIZE;
} else {
zdev->type_string = "PCIXCC_MCL3";
zdev->speed_rating = PCIXCC_MCL3_SPEED_RATING;
zdev->min_mod_size = PCIXCC_MIN_MOD_SIZE;
zdev->max_mod_size = PCIXCC_MAX_MOD_SIZE;
zdev->max_exp_bit_length = PCIXCC_MAX_MOD_SIZE;
}
break;
case AP_DEVICE_TYPE_CEX2C:
@ -1065,6 +1076,7 @@ static int zcrypt_pcixcc_probe(struct ap_device *ap_dev)
zdev->speed_rating = CEX2C_SPEED_RATING;
zdev->min_mod_size = PCIXCC_MIN_MOD_SIZE;
zdev->max_mod_size = PCIXCC_MAX_MOD_SIZE;
zdev->max_exp_bit_length = PCIXCC_MAX_MOD_SIZE;
break;
case AP_DEVICE_TYPE_CEX3C:
zdev->user_space_type = ZCRYPT_CEX3C;
@ -1072,6 +1084,7 @@ static int zcrypt_pcixcc_probe(struct ap_device *ap_dev)
zdev->speed_rating = CEX3C_SPEED_RATING;
zdev->min_mod_size = CEX3C_MIN_MOD_SIZE;
zdev->max_mod_size = CEX3C_MAX_MOD_SIZE;
zdev->max_exp_bit_length = CEX3C_MAX_MOD_SIZE;
break;
default:
goto out_free;

3
drivers/s390/kvm/kvm_virtio.c
View file

@ -10,6 +10,7 @@
* Author(s): Christian Borntraeger <borntraeger@de.ibm.com>
*/
#include <linux/kernel_stat.h>
#include <linux/init.h>
#include <linux/bootmem.h>
#include <linux/err.h>
@ -25,6 +26,7 @@
#include <asm/kvm_virtio.h>
#include <asm/setup.h>
#include <asm/s390_ext.h>
#include <asm/irq.h>
#define VIRTIO_SUBCODE_64 0x0D00
@ -379,6 +381,7 @@ static void kvm_extint_handler(unsigned int ext_int_code,
u16 subcode;
u32 param;
kstat_cpu(smp_processor_id()).irqs[EXTINT_VRT]++;
subcode = ext_int_code >> 16;
if ((subcode & 0xff00) != VIRTIO_SUBCODE_64)
return;

51
drivers/s390/net/Kconfig
View file

@ -2,7 +2,8 @@ menu "S/390 network device drivers"
depends on NETDEVICES && S390
config LCS
tristate "Lan Channel Station Interface"
def_tristate m
prompt "Lan Channel Station Interface"
depends on CCW && NETDEVICES && (NET_ETHERNET || TR || FDDI)
help
Select this option if you want to use LCS networking on IBM System z.
@ -12,7 +13,8 @@ config LCS
If you do not know what it is, it's safe to choose Y.
config CTCM
tristate "CTC and MPC SNA device support"
def_tristate m
prompt "CTC and MPC SNA device support"
depends on CCW && NETDEVICES
help
Select this option if you want to use channel-to-channel
@ -26,7 +28,8 @@ config CTCM
If you do not need any channel-to-channel connection, choose N.
config NETIUCV
tristate "IUCV network device support (VM only)"
def_tristate m
prompt "IUCV network device support (VM only)"
depends on IUCV && NETDEVICES
help
Select this option if you want to use inter-user communication
@ -37,14 +40,16 @@ config NETIUCV
The module name is netiucv. If unsure, choose Y.
config SMSGIUCV
tristate "IUCV special message support (VM only)"
def_tristate m
prompt "IUCV special message support (VM only)"
depends on IUCV
help
Select this option if you want to be able to receive SMSG messages
from other VM guest systems.
config SMSGIUCV_EVENT
tristate "Deliver IUCV special messages as uevents (VM only)"
def_tristate m
prompt "Deliver IUCV special messages as uevents (VM only)"
depends on SMSGIUCV
help
Select this option to deliver CP special messages (SMSGs) as
@ -54,7 +59,8 @@ config SMSGIUCV_EVENT
To compile as a module, choose M. The module name is "smsgiucv_app".
config CLAW
tristate "CLAW device support"
def_tristate m
prompt "CLAW device support"
depends on CCW && NETDEVICES
help
This driver supports channel attached CLAW devices.
@ -64,7 +70,8 @@ config CLAW
To compile into the kernel, choose Y.
config QETH
tristate "Gigabit Ethernet device support"
def_tristate y
prompt "Gigabit Ethernet device support"
depends on CCW && NETDEVICES && IP_MULTICAST && QDIO
help
This driver supports the IBM System z OSA Express adapters
@ -78,25 +85,25 @@ config QETH
The module name is qeth.
config QETH_L2
tristate "qeth layer 2 device support"
depends on QETH
help
Select this option to be able to run qeth devices in layer 2 mode.
To compile as a module, choose M. The module name is qeth_l2.
If unsure, choose y.
def_tristate y
prompt "qeth layer 2 device support"
depends on QETH
help
Select this option to be able to run qeth devices in layer 2 mode.
To compile as a module, choose M. The module name is qeth_l2.
If unsure, choose y.
config QETH_L3
tristate "qeth layer 3 device support"
depends on QETH
help
Select this option to be able to run qeth devices in layer 3 mode.
To compile as a module choose M. The module name is qeth_l3.
If unsure, choose Y.
def_tristate y
prompt "qeth layer 3 device support"
depends on QETH
help
Select this option to be able to run qeth devices in layer 3 mode.
To compile as a module choose M. The module name is qeth_l3.
If unsure, choose Y.
config QETH_IPV6
bool
depends on (QETH_L3 = IPV6) || (QETH_L3 && IPV6 = 'y')
default y
def_bool y if (QETH_L3 = IPV6) || (QETH_L3 && IPV6 = 'y')
config CCWGROUP
tristate

2
drivers/s390/net/claw.c
View file

@ -63,6 +63,7 @@
#define KMSG_COMPONENT "claw"
#include <linux/kernel_stat.h>
#include <asm/ccwdev.h>
#include <asm/ccwgroup.h>
#include <asm/debug.h>
@ -640,6 +641,7 @@ claw_irq_handler(struct ccw_device *cdev,
struct claw_env *p_env;
struct chbk *p_ch_r=NULL;
kstat_cpu(smp_processor_id()).irqs[IOINT_CLW]++;
CLAW_DBF_TEXT(4, trace, "clawirq");
/* Bypass all 'unsolicited interrupts' */
privptr = dev_get_drvdata(&cdev->dev);

2
drivers/s390/net/ctcm_main.c
View file

@ -24,6 +24,7 @@
#define KMSG_COMPONENT "ctcm"
#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
#include <linux/kernel_stat.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/kernel.h>
@ -1204,6 +1205,7 @@ static void ctcm_irq_handler(struct ccw_device *cdev,
int cstat;
int dstat;
kstat_cpu(smp_processor_id()).irqs[IOINT_CTC]++;
CTCM_DBF_TEXT_(TRACE, CTC_DBF_DEBUG,
"Enter %s(%s)", CTCM_FUNTAIL, dev_name(&cdev->dev));

2
drivers/s390/net/lcs.c
View file

@ -26,6 +26,7 @@
#define KMSG_COMPONENT "lcs"
#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
#include <linux/kernel_stat.h>
#include <linux/module.h>
#include <linux/if.h>
#include <linux/netdevice.h>
@ -1398,6 +1399,7 @@ lcs_irq(struct ccw_device *cdev, unsigned long intparm, struct irb *irb)
int rc, index;
int cstat, dstat;
kstat_cpu(smp_processor_id()).irqs[IOINT_LCS]++;
if (lcs_check_irb_error(cdev, irb))
return;

2
drivers/s390/net/qeth_core_main.c
View file

@ -3831,6 +3831,8 @@ static int qeth_qdio_establish(struct qeth_card *card)
init_data.int_parm = (unsigned long) card;
init_data.input_sbal_addr_array = (void **) in_sbal_ptrs;
init_data.output_sbal_addr_array = (void **) out_sbal_ptrs;
init_data.scan_threshold =
(card->info.type == QETH_CARD_TYPE_IQD) ? 8 : 32;
if (atomic_cmpxchg(&card->qdio.state, QETH_QDIO_ALLOCATED,
QETH_QDIO_ESTABLISHED) == QETH_QDIO_ALLOCATED) {

2
drivers/s390/scsi/zfcp_qdio.c
View file

@ -290,6 +290,8 @@ static void zfcp_qdio_setup_init_data(struct qdio_initialize *id,
id->int_parm = (unsigned long) qdio;
id->input_sbal_addr_array = (void **) (qdio->res_q);
id->output_sbal_addr_array = (void **) (qdio->req_q);
id->scan_threshold =
QDIO_MAX_BUFFERS_PER_Q - ZFCP_QDIO_MAX_SBALS_PER_REQ * 2;
}
/**

2
net/iucv/iucv.c
View file

@ -36,6 +36,7 @@
#define KMSG_COMPONENT "iucv"
#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
#include <linux/kernel_stat.h>
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/spinlock.h>
@ -1804,6 +1805,7 @@ static void iucv_external_interrupt(unsigned int ext_int_code,
struct iucv_irq_data *p;
struct iucv_irq_list *work;
kstat_cpu(smp_processor_id()).irqs[EXTINT_IUC]++;
p = iucv_irq_data[smp_processor_id()];
if (p->ippathid >= iucv_max_pathid) {
WARN_ON(p->ippathid >= iucv_max_pathid);

4
tools/perf/arch/s390/Makefile Normal file
View file

@ -0,0 +1,4 @@
ifndef NO_DWARF
PERF_HAVE_DWARF_REGS := 1
LIB_OBJS += $(OUTPUT)arch/$(ARCH)/util/dwarf-regs.o
endif

22
tools/perf/arch/s390/util/dwarf-regs.c Normal file
View file

@ -0,0 +1,22 @@
/*
* Mapping of DWARF debug register numbers into register names.
*
* Copyright IBM Corp. 2010
* Author(s): Heiko Carstens <heiko.carstens@de.ibm.com>,
*
*/
#include <libio.h>
#include <dwarf-regs.h>
#define NUM_GPRS 16
static const char *gpr_names[NUM_GPRS] = {
"%r0", "%r1", "%r2", "%r3", "%r4", "%r5", "%r6", "%r7",
"%r8", "%r9", "%r10", "%r11", "%r12", "%r13", "%r14", "%r15",
};
const char *get_arch_regstr(unsigned int n)
{
return (n >= NUM_GPRS) ? NULL : gpr_names[n];
}