arch/s390/include/asm/thread_info.h

   1 /*
   2  *  S390 version
   3  *    Copyright IBM Corp. 2002, 2006
   4  *    Author(s): Martin Schwidefsky (schwidefsky@de.ibm.com)
   5  */
   6
   7 #ifndef _ASM_THREAD_INFO_H
   8 #define _ASM_THREAD_INFO_H
   9
  10 #include <linux/const.h>
  11
  12 /*
  13  * Size of kernel stack for each process
  14  */
  15 #define THREAD_SIZE_ORDER 2
  16 #define ASYNC_ORDER  2
  17
  18 #define THREAD_SIZE (PAGE_SIZE << THREAD_SIZE_ORDER)
  19 #define ASYNC_SIZE  (PAGE_SIZE << ASYNC_ORDER)
  20
  21 #ifndef __ASSEMBLY__
  22 #include <asm/lowcore.h>
  23 #include <asm/page.h>
  24 #include <asm/processor.h>
  25
  26 /*
  27  * low level task data that entry.S needs immediate access to
  28  * - this struct should fit entirely inside of one cache line
  29  * - this struct shares the supervisor stack pages
  30  * - if the contents of this structure are changed, the assembly constants must also be changed
  31  */
  32 struct thread_info {
  33         unsigned long           flags;          /* low level flags */
  34 };
  35
  36 /*
  37  * macros/functions for gaining access to the thread information structure
  38  */
  39 #define INIT_THREAD_INFO(tsk)                   \
  40 {                                               \
  41         .flags          = 0,                    \
  42 }
  43
  44 #define init_stack              (init_thread_union.stack)
  45
  46 void arch_release_task_struct(struct task_struct *tsk);
  47 int arch_dup_task_struct(struct task_struct *dst, struct task_struct *src);
  48
  49 #endif
  50
  51 /*
  52  * thread information flags bit numbers
  53  */
  54 /* _TIF_WORK bits */
  55 #define TIF_NOTIFY_RESUME       0       /* callback before returning to user */
  56 #define TIF_SIGPENDING          1       /* signal pending */
  57 #define TIF_NEED_RESCHED        2       /* rescheduling necessary */
  58 #define TIF_UPROBE              3       /* breakpointed or single-stepping */
  59 #define TIF_GUARDED_STORAGE     4       /* load guarded storage control block */
  60 #define TIF_PATCH_PENDING       5       /* pending live patching update */
  61 #define TIF_PGSTE               6       /* New mm's will use 4K page tables */
  62
  63 #define TIF_31BIT               16      /* 32bit process */
  64 #define TIF_MEMDIE              17      /* is terminating due to OOM killer */
  65 #define TIF_RESTORE_SIGMASK     18      /* restore signal mask in do_signal() */
  66 #define TIF_SINGLE_STEP         19      /* This task is single stepped */
  67 #define TIF_BLOCK_STEP          20      /* This task is block stepped */
  68 #define TIF_UPROBE_SINGLESTEP   21      /* This task is uprobe single stepped */
  69
  70 /* _TIF_TRACE bits */
  71 #define TIF_SYSCALL_TRACE       24      /* syscall trace active */
  72 #define TIF_SYSCALL_AUDIT       25      /* syscall auditing active */
  73 #define TIF_SECCOMP             26      /* secure computing */
  74 #define TIF_SYSCALL_TRACEPOINT  27      /* syscall tracepoint instrumentation */
  75
  76 #define _TIF_NOTIFY_RESUME      _BITUL(TIF_NOTIFY_RESUME)
  77 #define _TIF_SIGPENDING         _BITUL(TIF_SIGPENDING)
  78 #define _TIF_NEED_RESCHED       _BITUL(TIF_NEED_RESCHED)
  79 #define _TIF_UPROBE             _BITUL(TIF_UPROBE)
  80 #define _TIF_GUARDED_STORAGE    _BITUL(TIF_GUARDED_STORAGE)
  81 #define _TIF_PATCH_PENDING      _BITUL(TIF_PATCH_PENDING)
  82
  83 #define _TIF_31BIT              _BITUL(TIF_31BIT)
  84 #define _TIF_SINGLE_STEP        _BITUL(TIF_SINGLE_STEP)
  85
  86 #define _TIF_SYSCALL_TRACE      _BITUL(TIF_SYSCALL_TRACE)
  87 #define _TIF_SYSCALL_AUDIT      _BITUL(TIF_SYSCALL_AUDIT)
  88 #define _TIF_SECCOMP            _BITUL(TIF_SECCOMP)
  89 #define _TIF_SYSCALL_TRACEPOINT _BITUL(TIF_SYSCALL_TRACEPOINT)
  90
  91 #endif /* _ASM_THREAD_INFO_H */