arch/s390/include/asm/thread_info.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  *  S390 version
   4  *    Copyright IBM Corp. 2002, 2006
   5  *    Author(s): Martin Schwidefsky (schwidefsky@de.ibm.com)
   6  */
   7
   8 #ifndef _ASM_THREAD_INFO_H
   9 #define _ASM_THREAD_INFO_H
  10
  11 #include <linux/const.h>
  12
  13 /*
  14  * Size of kernel stack for each process
  15  */
  16 #define THREAD_SIZE_ORDER 2
  17 #define ASYNC_ORDER  2
  18
  19 #define THREAD_SIZE (PAGE_SIZE << THREAD_SIZE_ORDER)
  20 #define ASYNC_SIZE  (PAGE_SIZE << ASYNC_ORDER)
  21
  22 #ifndef __ASSEMBLY__
  23 #include <asm/lowcore.h>
  24 #include <asm/page.h>
  25 #include <asm/processor.h>
  26
  27 /*
  28  * low level task data that entry.S needs immediate access to
  29  * - this struct should fit entirely inside of one cache line
  30  * - this struct shares the supervisor stack pages
  31  * - if the contents of this structure are changed, the assembly constants must also be changed
  32  */
  33 struct thread_info {
  34         unsigned long           flags;          /* low level flags */
  35 };
  36
  37 /*
  38  * macros/functions for gaining access to the thread information structure
  39  */
  40 #define INIT_THREAD_INFO(tsk)                   \
  41 {                                               \
  42         .flags          = 0,                    \
  43 }
  44
  45 void arch_release_task_struct(struct task_struct *tsk);
  46 int arch_dup_task_struct(struct task_struct *dst, struct task_struct *src);
  47
  48 #endif
  49
  50 /*
  51  * thread information flags bit numbers
  52  */
  53 /* _TIF_WORK bits */
  54 #define TIF_NOTIFY_RESUME       0       /* callback before returning to user */
  55 #define TIF_SIGPENDING          1       /* signal pending */
  56 #define TIF_NEED_RESCHED        2       /* rescheduling necessary */
  57 #define TIF_UPROBE              3       /* breakpointed or single-stepping */
  58 #define TIF_GUARDED_STORAGE     4       /* load guarded storage control block */
  59 #define TIF_PATCH_PENDING       5       /* pending live patching update */
  60 #define TIF_PGSTE               6       /* New mm's will use 4K page tables */
  61 #define TIF_ISOLATE_BP          8       /* Run process with isolated BP */
  62 #define TIF_ISOLATE_BP_GUEST    9       /* Run KVM guests with isolated BP */
  63
  64 #define TIF_31BIT               16      /* 32bit process */
  65 #define TIF_MEMDIE              17      /* is terminating due to OOM killer */
  66 #define TIF_RESTORE_SIGMASK     18      /* restore signal mask in do_signal() */
  67 #define TIF_SINGLE_STEP         19      /* This task is single stepped */
  68 #define TIF_BLOCK_STEP          20      /* This task is block stepped */
  69 #define TIF_UPROBE_SINGLESTEP   21      /* This task is uprobe single stepped */
  70
  71 /* _TIF_TRACE bits */
  72 #define TIF_SYSCALL_TRACE       24      /* syscall trace active */
  73 #define TIF_SYSCALL_AUDIT       25      /* syscall auditing active */
  74 #define TIF_SECCOMP             26      /* secure computing */
  75 #define TIF_SYSCALL_TRACEPOINT  27      /* syscall tracepoint instrumentation */
  76
  77 #define _TIF_NOTIFY_RESUME      _BITUL(TIF_NOTIFY_RESUME)
  78 #define _TIF_SIGPENDING         _BITUL(TIF_SIGPENDING)
  79 #define _TIF_NEED_RESCHED       _BITUL(TIF_NEED_RESCHED)
  80 #define _TIF_UPROBE             _BITUL(TIF_UPROBE)
  81 #define _TIF_GUARDED_STORAGE    _BITUL(TIF_GUARDED_STORAGE)
  82 #define _TIF_PATCH_PENDING      _BITUL(TIF_PATCH_PENDING)
  83 #define _TIF_ISOLATE_BP         _BITUL(TIF_ISOLATE_BP)
  84 #define _TIF_ISOLATE_BP_GUEST   _BITUL(TIF_ISOLATE_BP_GUEST)
  85
  86 #define _TIF_31BIT              _BITUL(TIF_31BIT)
  87 #define _TIF_SINGLE_STEP        _BITUL(TIF_SINGLE_STEP)
  88
  89 #define _TIF_SYSCALL_TRACE      _BITUL(TIF_SYSCALL_TRACE)
  90 #define _TIF_SYSCALL_AUDIT      _BITUL(TIF_SYSCALL_AUDIT)
  91 #define _TIF_SECCOMP            _BITUL(TIF_SECCOMP)
  92 #define _TIF_SYSCALL_TRACEPOINT _BITUL(TIF_SYSCALL_TRACEPOINT)
  93
  94 #endif /* _ASM_THREAD_INFO_H */