a05c90f194
Helper function which tells us if a task is running in ESA mode. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
131 lines
3.9 KiB
C
131 lines
3.9 KiB
C
/*
|
|
* include/asm-s390/thread_info.h
|
|
*
|
|
* S390 version
|
|
* Copyright (C) IBM Corp. 2002,2006
|
|
* Author(s): Martin Schwidefsky (schwidefsky@de.ibm.com)
|
|
*/
|
|
|
|
#ifndef _ASM_THREAD_INFO_H
|
|
#define _ASM_THREAD_INFO_H
|
|
|
|
#ifdef __KERNEL__
|
|
|
|
/*
|
|
* Size of kernel stack for each process
|
|
*/
|
|
#ifndef __s390x__
|
|
#define THREAD_ORDER 1
|
|
#define ASYNC_ORDER 1
|
|
#else /* __s390x__ */
|
|
#ifndef __SMALL_STACK
|
|
#define THREAD_ORDER 2
|
|
#define ASYNC_ORDER 2
|
|
#else
|
|
#define THREAD_ORDER 1
|
|
#define ASYNC_ORDER 1
|
|
#endif
|
|
#endif /* __s390x__ */
|
|
|
|
#define THREAD_SIZE (PAGE_SIZE << THREAD_ORDER)
|
|
#define ASYNC_SIZE (PAGE_SIZE << ASYNC_ORDER)
|
|
|
|
#ifndef __ASSEMBLY__
|
|
#include <asm/lowcore.h>
|
|
#include <asm/page.h>
|
|
#include <asm/processor.h>
|
|
|
|
/*
|
|
* low level task data that entry.S needs immediate access to
|
|
* - this struct should fit entirely inside of one cache line
|
|
* - this struct shares the supervisor stack pages
|
|
* - if the contents of this structure are changed, the assembly constants must also be changed
|
|
*/
|
|
struct thread_info {
|
|
struct task_struct *task; /* main task structure */
|
|
struct exec_domain *exec_domain; /* execution domain */
|
|
unsigned long flags; /* low level flags */
|
|
unsigned int cpu; /* current CPU */
|
|
int preempt_count; /* 0 => preemptable, <0 => BUG */
|
|
struct restart_block restart_block;
|
|
__u64 user_timer;
|
|
__u64 system_timer;
|
|
unsigned long last_break; /* last breaking-event-address. */
|
|
};
|
|
|
|
/*
|
|
* macros/functions for gaining access to the thread information structure
|
|
*/
|
|
#define INIT_THREAD_INFO(tsk) \
|
|
{ \
|
|
.task = &tsk, \
|
|
.exec_domain = &default_exec_domain, \
|
|
.flags = 0, \
|
|
.cpu = 0, \
|
|
.preempt_count = INIT_PREEMPT_COUNT, \
|
|
.restart_block = { \
|
|
.fn = do_no_restart_syscall, \
|
|
}, \
|
|
}
|
|
|
|
#define init_thread_info (init_thread_union.thread_info)
|
|
#define init_stack (init_thread_union.stack)
|
|
|
|
/* how to get the thread information struct from C */
|
|
static inline struct thread_info *current_thread_info(void)
|
|
{
|
|
return (struct thread_info *) S390_lowcore.thread_info;
|
|
}
|
|
|
|
#define THREAD_SIZE_ORDER THREAD_ORDER
|
|
|
|
#endif
|
|
|
|
/*
|
|
* thread information flags bit numbers
|
|
*/
|
|
#define TIF_NOTIFY_RESUME 1 /* callback before returning to user */
|
|
#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_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 */
|
|
#define TIF_SECCOMP 10 /* secure computing */
|
|
#define TIF_SYSCALL_TRACEPOINT 11 /* syscall tracepoint instrumentation */
|
|
#define TIF_POLLING_NRFLAG 16 /* true if poll_idle() is polling
|
|
TIF_NEED_RESCHED */
|
|
#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_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_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)
|
|
#define _TIF_SECCOMP (1<<TIF_SECCOMP)
|
|
#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)
|
|
|
|
#ifdef CONFIG_64BIT
|
|
#define is_32bit_task() (test_thread_flag(TIF_31BIT))
|
|
#else
|
|
#define is_32bit_task() (1)
|
|
#endif
|
|
|
|
#endif /* __KERNEL__ */
|
|
|
|
#define PREEMPT_ACTIVE 0x4000000
|
|
|
|
#endif /* _ASM_THREAD_INFO_H */
|