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[SPARC64]: Report proper system soft state to the hypervisor.

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Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller 2007-05-25 00:37:12 -07:00
parent 36b48973b8
commit 22d6a1cba3
12 changed files with 175 additions and 7 deletions
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2
arch/sparc64/kernel/Makefile
View file

@ -12,7 +12,7 @@ obj-y := process.o setup.o cpu.o idprom.o \
irq.o ptrace.o time.o sys_sparc.o signal.o \
unaligned.o central.o pci.o starfire.o semaphore.o \
power.o sbus.o iommu_common.o sparc64_ksyms.o chmc.o \
visemul.o prom.o of_device.o hvapi.o
visemul.o prom.o of_device.o hvapi.o sstate.o
obj-$(CONFIG_STACKTRACE) += stacktrace.o
obj-$(CONFIG_PCI) += ebus.o isa.o pci_common.o pci_iommu.o \

12
arch/sparc64/kernel/entry.S
View file

@ -1937,3 +1937,15 @@ sun4v_con_write:
stx %o1, [%o4]
retl
nop
/* %o0: soft state
* %o1: address of description string
*
* returns %o0: status
*/
.globl sun4v_mach_set_soft_state
sun4v_mach_set_soft_state:
mov HV_FAST_MACH_SET_SOFT_STATE, %o5
ta HV_FAST_TRAP
retl
nop

3
arch/sparc64/kernel/hvapi.c
View file

@ -9,6 +9,7 @@
#include <asm/hypervisor.h>
#include <asm/oplib.h>
#include <asm/sstate.h>
/* If the hypervisor indicates that the API setting
* calls are unsupported, by returning HV_EBADTRAP or
@ -179,6 +180,8 @@ void __init sun4v_hvapi_init(void)
if (sun4v_hvapi_register(group, major, &minor))
goto bad;
sun4v_sstate_init();
return;
bad:

2
arch/sparc64/kernel/power.c
View file

@ -19,6 +19,7 @@
#include <asm/prom.h>
#include <asm/of_device.h>
#include <asm/io.h>
#include <asm/sstate.h>
#include <linux/unistd.h>
@ -53,6 +54,7 @@ static void (*poweroff_method)(void) = machine_alt_power_off;
void machine_power_off(void)
{
sstate_poweroff();
if (!serial_console || scons_pwroff) {
#ifdef CONFIG_PCI
if (power_reg) {

4
arch/sparc64/kernel/process.c
View file

@ -45,6 +45,7 @@
#include <asm/mmu_context.h>
#include <asm/unistd.h>
#include <asm/hypervisor.h>
#include <asm/sstate.h>
/* #define VERBOSE_SHOWREGS */
@ -106,6 +107,7 @@ extern void (*prom_keyboard)(void);
void machine_halt(void)
{
sstate_halt();
if (!serial_console && prom_palette)
prom_palette (1);
if (prom_keyboard)
@ -116,6 +118,7 @@ void machine_halt(void)
void machine_alt_power_off(void)
{
sstate_poweroff();
if (!serial_console && prom_palette)
prom_palette(1);
if (prom_keyboard)
@ -128,6 +131,7 @@ void machine_restart(char * cmd)
{
char *p;
sstate_reboot();
p = strchr (reboot_command, '\n');
if (p) *p = 0;
if (!serial_console && prom_palette)

104
arch/sparc64/kernel/sstate.c Normal file
View file

@ -0,0 +1,104 @@
/* sstate.c: System soft state support.
*
* Copyright (C) 2007 David S. Miller <davem@davemloft.net>
*/
#include <linux/kernel.h>
#include <linux/notifier.h>
#include <linux/init.h>
#include <asm/hypervisor.h>
#include <asm/sstate.h>
#include <asm/oplib.h>
#include <asm/head.h>
#include <asm/io.h>
static int hv_supports_soft_state;
static unsigned long kimage_addr_to_ra(const char *p)
{
unsigned long val = (unsigned long) p;
return kern_base + (val - KERNBASE);
}
static void do_set_sstate(unsigned long state, const char *msg)
{
unsigned long err;
if (!hv_supports_soft_state)
return;
err = sun4v_mach_set_soft_state(state, kimage_addr_to_ra(msg));
if (err) {
printk(KERN_WARNING "SSTATE: Failed to set soft-state to "
"state[%lx] msg[%s], err=%lu\n",
state, msg, err);
}
}
static const char booting_msg[32] __attribute__((aligned(32))) =
"Linux booting";
static const char running_msg[32] __attribute__((aligned(32))) =
"Linux running";
static const char halting_msg[32] __attribute__((aligned(32))) =
"Linux halting";
static const char poweroff_msg[32] __attribute__((aligned(32))) =
"Linux powering off";
static const char rebooting_msg[32] __attribute__((aligned(32))) =
"Linux rebooting";
static const char panicing_msg[32] __attribute__((aligned(32))) =
"Linux panicing";
void sstate_booting(void)
{
do_set_sstate(HV_SOFT_STATE_TRANSITION, booting_msg);
}
void sstate_running(void)
{
do_set_sstate(HV_SOFT_STATE_NORMAL, running_msg);
}
void sstate_halt(void)
{
do_set_sstate(HV_SOFT_STATE_TRANSITION, halting_msg);
}
void sstate_poweroff(void)
{
do_set_sstate(HV_SOFT_STATE_TRANSITION, poweroff_msg);
}
void sstate_reboot(void)
{
do_set_sstate(HV_SOFT_STATE_TRANSITION, rebooting_msg);
}
static int sstate_panic_event(struct notifier_block *n, unsigned long event, void *ptr)
{
do_set_sstate(HV_SOFT_STATE_TRANSITION, panicing_msg);
return NOTIFY_DONE;
}
static struct notifier_block sstate_panic_block = {
.notifier_call = sstate_panic_event,
.priority = INT_MAX,
};
void __init sun4v_sstate_init(void)
{
unsigned long major, minor;
major = 1;
minor = 0;
if (sun4v_hvapi_register(HV_GRP_SOFT_STATE, major, &minor))
return;
hv_supports_soft_state = 1;
prom_sun4v_guest_soft_state();
atomic_notifier_chain_register(&panic_notifier_list,
&sstate_panic_block);
}

3
arch/sparc64/mm/init.c
View file

@ -43,6 +43,7 @@
#include <asm/tsb.h>
#include <asm/hypervisor.h>
#include <asm/prom.h>
#include <asm/sstate.h>
extern void device_scan(void);
@ -1348,6 +1349,8 @@ void __init paging_init(void)
kern_base = (prom_boot_mapping_phys_low >> 22UL) << 22UL;
kern_size = (unsigned long)&_end - (unsigned long)KERNBASE;
sstate_booting();
/* Invalidate both kernel TSBs. */
memset(swapper_tsb, 0x40, sizeof(swapper_tsb));
#ifndef CONFIG_DEBUG_PAGEALLOC

19
arch/sparc64/prom/misc.c
View file

@ -15,6 +15,25 @@
#include <asm/oplib.h>
#include <asm/system.h>
int prom_service_exists(const char *service_name)
{
int err = p1275_cmd("test", P1275_ARG(0, P1275_ARG_IN_STRING) |
P1275_INOUT(1, 1), service_name);
if (err)
return 0;
return 1;
}
void prom_sun4v_guest_soft_state(void)
{
const char *svc = "SUNW,soft-state-supported";
if (!prom_service_exists(svc))
return;
p1275_cmd(svc, P1275_INOUT(0, 0));
}
/* Reset and reboot the machine with the command 'bcommand'. */
void prom_reboot(const char *bcommand)
{

8
include/asm-sparc64/bugs.h
View file

@ -1,9 +1,8 @@
/* $Id: bugs.h,v 1.1 1996/12/26 13:25:20 davem Exp $
* include/asm-sparc64/bugs.h: Sparc probes for various bugs.
/* bugs.h: Sparc64 probes for various bugs.
*
* Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu)
* Copyright (C) 1996, 2007 David S. Miller (davem@davemloft.net)
*/
#include <asm/sstate.h>
extern unsigned long loops_per_jiffy;
@ -12,4 +11,5 @@ static void __init check_bugs(void)
#ifndef CONFIG_SMP
cpu_data(0).udelay_val = loops_per_jiffy;
#endif
sstate_running();
}

10
include/asm-sparc64/hypervisor.h
View file

@ -162,10 +162,15 @@
* terminated 7-bit ASCII string of up to 31 characters not including the
* NULL termination.
*/
#define HV_FAST_MACH_SET_SOFT_STATE 0x03
#define HV_FAST_MACH_SET_SOFT_STATE 0x70
#define HV_SOFT_STATE_NORMAL 0x01
#define HV_SOFT_STATE_TRANSITION 0x02
#ifndef __ASSEMBLY__
extern unsigned long sun4v_mach_set_soft_state(unsigned long soft_state,
unsigned long msg_string_ra);
#endif
/* mach_get_soft_state()
* TRAP: HV_FAST_TRAP
* FUNCTION: HV_FAST_MACH_GET_SOFT_STATE
@ -181,7 +186,7 @@
* for the software state pointer are the same as for mach_set_soft_state()
* above.
*/
#define HV_FAST_MACH_GET_SOFT_STATE 0x04
#define HV_FAST_MACH_GET_SOFT_STATE 0x71
/* CPU services.
*
@ -2204,6 +2209,7 @@ extern void sun4v_hvapi_unregister(unsigned long group);
extern int sun4v_hvapi_get(unsigned long group,
unsigned long *major,
unsigned long *minor);
extern void sun4v_hvapi_init(void);
#endif
#endif /* !(_SPARC64_HYPERVISOR_H) */

2
include/asm-sparc64/oplib.h
View file

@ -316,6 +316,8 @@ extern int prom_setprop(int node, const char *prop_name, char *prop_value,
extern int prom_pathtoinode(const char *path);
extern int prom_inst2pkg(int);
extern int prom_service_exists(const char *service_name);
extern void prom_sun4v_guest_soft_state(void);
/* CPU probing helpers. */
struct device_node;

13
include/asm-sparc64/sstate.h Normal file
View file

@ -0,0 +1,13 @@
#ifndef _SPARC64_SSTATE_H
#define _SPARC64_SSTATE_H
extern void sstate_booting(void);
extern void sstate_running(void);
extern void sstate_halt(void);
extern void sstate_poweroff(void);
extern void sstate_panic(void);
extern void sstate_reboot(void);
extern void sun4v_sstate_init(void);
#endif /* _SPARC64_SSTATE_H */