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/bits.h>
  12
  13 /*
  14  * General size of kernel stacks
  15  */
  16 #ifdef CONFIG_KASAN
  17 #define THREAD_SIZE_ORDER 4
  18 #else
  19 #define THREAD_SIZE_ORDER 2
  20 #endif
  21 #define BOOT_STACK_SIZE (PAGE_SIZE << 2)
  22 #define THREAD_SIZE (PAGE_SIZE << THREAD_SIZE_ORDER)
  23
  24 #ifndef __ASSEMBLY__
  25 #include <asm/lowcore.h>
  26 #include <asm/page.h>
  27
  28 #define STACK_INIT_OFFSET \
  29         (THREAD_SIZE - STACK_FRAME_OVERHEAD - sizeof(struct pt_regs))
  30
  31 /*
  32  * low level task data that entry.S needs immediate access to
  33  * - this struct should fit entirely inside of one cache line
  34  * - this struct shares the supervisor stack pages
  35  * - if the contents of this structure are changed, the assembly constants must also be changed
  36  */
  37 struct thread_info {
  38         unsigned long           flags;          /* low level flags */
  39 };
  40
  41 /*
  42  * macros/functions for gaining access to the thread information structure
  43  */
  44 #define INIT_THREAD_INFO(tsk)                   \
  45 {                                               \
  46         .flags          = 0,                    \
  47 }
  48
  49 void arch_release_task_struct(struct task_struct *tsk);
  50 int arch_dup_task_struct(struct task_struct *dst, struct task_struct *src);
  51
  52 void arch_setup_new_exec(void);
  53 #define arch_setup_new_exec arch_setup_new_exec
  54
  55 #endif
  56
  57 /*
  58  * thread information flags bit numbers
  59  */
  60 /* _TIF_WORK bits */
  61 #define TIF_NOTIFY_RESUME       0       /* callback before returning to user */
  62 #define TIF_SIGPENDING          1       /* signal pending */
  63 #define TIF_NEED_RESCHED        2       /* rescheduling necessary */
  64 #define TIF_UPROBE              3       /* breakpointed or single-stepping */
  65 #define TIF_GUARDED_STORAGE     4       /* load guarded storage control block */
  66 #define TIF_PATCH_PENDING       5       /* pending live patching update */
  67 #define TIF_PGSTE               6       /* New mm's will use 4K page tables */
  68 #define TIF_NOTIFY_SIGNAL       7       /* signal notifications exist */
  69 #define TIF_ISOLATE_BP          8       /* Run process with isolated BP */
  70 #define TIF_ISOLATE_BP_GUEST    9       /* Run KVM guests with isolated BP */
  71
  72 #define TIF_31BIT               16      /* 32bit process */
  73 #define TIF_MEMDIE              17      /* is terminating due to OOM killer */
  74 #define TIF_RESTORE_SIGMASK     18      /* restore signal mask in do_signal() */
  75 #define TIF_SINGLE_STEP         19      /* This task is single stepped */
  76 #define TIF_BLOCK_STEP          20      /* This task is block stepped */
  77 #define TIF_UPROBE_SINGLESTEP   21      /* This task is uprobe single stepped */
  78
  79 /* _TIF_TRACE bits */
  80 #define TIF_SYSCALL_TRACE       24      /* syscall trace active */
  81 #define TIF_SYSCALL_AUDIT       25      /* syscall auditing active */
  82 #define TIF_SECCOMP             26      /* secure computing */
  83 #define TIF_SYSCALL_TRACEPOINT  27      /* syscall tracepoint instrumentation */
  84
  85 #define _TIF_NOTIFY_RESUME      BIT(TIF_NOTIFY_RESUME)
  86 #define _TIF_NOTIFY_SIGNAL      BIT(TIF_NOTIFY_SIGNAL)
  87 #define _TIF_SIGPENDING         BIT(TIF_SIGPENDING)
  88 #define _TIF_NEED_RESCHED       BIT(TIF_NEED_RESCHED)
  89 #define _TIF_UPROBE             BIT(TIF_UPROBE)
  90 #define _TIF_GUARDED_STORAGE    BIT(TIF_GUARDED_STORAGE)
  91 #define _TIF_PATCH_PENDING      BIT(TIF_PATCH_PENDING)
  92 #define _TIF_ISOLATE_BP         BIT(TIF_ISOLATE_BP)
  93 #define _TIF_ISOLATE_BP_GUEST   BIT(TIF_ISOLATE_BP_GUEST)
  94
  95 #define _TIF_31BIT              BIT(TIF_31BIT)
  96 #define _TIF_SINGLE_STEP        BIT(TIF_SINGLE_STEP)
  97
  98 #define _TIF_SYSCALL_TRACE      BIT(TIF_SYSCALL_TRACE)
  99 #define _TIF_SYSCALL_AUDIT      BIT(TIF_SYSCALL_AUDIT)
 100 #define _TIF_SECCOMP            BIT(TIF_SECCOMP)
 101 #define _TIF_SYSCALL_TRACEPOINT BIT(TIF_SYSCALL_TRACEPOINT)
 102
 103 #endif /* _ASM_THREAD_INFO_H */