arch/arm64/include/asm/thread_info.h

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2 /*
   3  * Based on arch/arm/include/asm/thread_info.h
   4  *
   5  * Copyright (C) 2002 Russell King.
   6  * Copyright (C) 2012 ARM Ltd.
   7  */
   8 #ifndef __ASM_THREAD_INFO_H
   9 #define __ASM_THREAD_INFO_H
  10
  11 #ifdef __KERNEL__
  12
  13 #include <linux/compiler.h>
  14
  15 #ifndef __ASSEMBLY__
  16
  17 struct task_struct;
  18
  19 #include <asm/memory.h>
  20 #include <asm/stack_pointer.h>
  21 #include <asm/types.h>
  22
  23 typedef unsigned long mm_segment_t;
  24
  25 /*
  26  * low level task data that entry.S needs immediate access to.
  27  */
  28 struct thread_info {
  29         unsigned long           flags;          /* low level flags */
  30         mm_segment_t            addr_limit;     /* address limit */
  31 #ifdef CONFIG_ARM64_SW_TTBR0_PAN
  32         u64                     ttbr0;          /* saved TTBR0_EL1 */
  33 #endif
  34         union {
  35                 u64             preempt_count;  /* 0 => preemptible, <0 => bug */
  36                 struct {
  37 #ifdef CONFIG_CPU_BIG_ENDIAN
  38                         u32     need_resched;
  39                         u32     count;
  40 #else
  41                         u32     count;
  42                         u32     need_resched;
  43 #endif
  44                 } preempt;
  45         };
  46 };
  47
  48 #define thread_saved_pc(tsk)    \
  49         ((unsigned long)(tsk->thread.cpu_context.pc))
  50 #define thread_saved_sp(tsk)    \
  51         ((unsigned long)(tsk->thread.cpu_context.sp))
  52 #define thread_saved_fp(tsk)    \
  53         ((unsigned long)(tsk->thread.cpu_context.fp))
  54
  55 void arch_setup_new_exec(void);
  56 #define arch_setup_new_exec     arch_setup_new_exec
  57
  58 void arch_release_task_struct(struct task_struct *tsk);
  59
  60 #endif
  61
  62 /*
  63  * thread information flags:
  64  *  TIF_SYSCALL_TRACE   - syscall trace active
  65  *  TIF_SYSCALL_TRACEPOINT - syscall tracepoint for ftrace
  66  *  TIF_SYSCALL_AUDIT   - syscall auditing
  67  *  TIF_SECCOMP         - syscall secure computing
  68  *  TIF_SYSCALL_EMU     - syscall emulation active
  69  *  TIF_SIGPENDING      - signal pending
  70  *  TIF_NEED_RESCHED    - rescheduling necessary
  71  *  TIF_NOTIFY_RESUME   - callback before returning to user
  72  */
  73 #define TIF_SIGPENDING          0
  74 #define TIF_NEED_RESCHED        1
  75 #define TIF_NOTIFY_RESUME       2       /* callback before returning to user */
  76 #define TIF_FOREIGN_FPSTATE     3       /* CPU's FP state is not current's */
  77 #define TIF_UPROBE              4       /* uprobe breakpoint or singlestep */
  78 #define TIF_FSCHECK             5       /* Check FS is USER_DS on return */
  79 #define TIF_NOHZ                7
  80 #define TIF_SYSCALL_TRACE       8
  81 #define TIF_SYSCALL_AUDIT       9
  82 #define TIF_SYSCALL_TRACEPOINT  10
  83 #define TIF_SECCOMP             11
  84 #define TIF_SYSCALL_EMU         12
  85 #define TIF_MEMDIE              18      /* is terminating due to OOM killer */
  86 #define TIF_FREEZE              19
  87 #define TIF_RESTORE_SIGMASK     20
  88 #define TIF_SINGLESTEP          21
  89 #define TIF_32BIT               22      /* 32bit process */
  90 #define TIF_SVE                 23      /* Scalable Vector Extension in use */
  91 #define TIF_SVE_VL_INHERIT      24      /* Inherit sve_vl_onexec across exec */
  92 #define TIF_SSBD                25      /* Wants SSB mitigation */
  93
  94 #define _TIF_SIGPENDING         (1 << TIF_SIGPENDING)
  95 #define _TIF_NEED_RESCHED       (1 << TIF_NEED_RESCHED)
  96 #define _TIF_NOTIFY_RESUME      (1 << TIF_NOTIFY_RESUME)
  97 #define _TIF_FOREIGN_FPSTATE    (1 << TIF_FOREIGN_FPSTATE)
  98 #define _TIF_NOHZ               (1 << TIF_NOHZ)
  99 #define _TIF_SYSCALL_TRACE      (1 << TIF_SYSCALL_TRACE)
 100 #define _TIF_SYSCALL_AUDIT      (1 << TIF_SYSCALL_AUDIT)
 101 #define _TIF_SYSCALL_TRACEPOINT (1 << TIF_SYSCALL_TRACEPOINT)
 102 #define _TIF_SECCOMP            (1 << TIF_SECCOMP)
 103 #define _TIF_SYSCALL_EMU        (1 << TIF_SYSCALL_EMU)
 104 #define _TIF_UPROBE             (1 << TIF_UPROBE)
 105 #define _TIF_FSCHECK            (1 << TIF_FSCHECK)
 106 #define _TIF_32BIT              (1 << TIF_32BIT)
 107 #define _TIF_SVE                (1 << TIF_SVE)
 108
 109 #define _TIF_WORK_MASK          (_TIF_NEED_RESCHED | _TIF_SIGPENDING | \
 110                                  _TIF_NOTIFY_RESUME | _TIF_FOREIGN_FPSTATE | \
 111                                  _TIF_UPROBE | _TIF_FSCHECK)
 112
 113 #define _TIF_SYSCALL_WORK       (_TIF_SYSCALL_TRACE | _TIF_SYSCALL_AUDIT | \
 114                                  _TIF_SYSCALL_TRACEPOINT | _TIF_SECCOMP | \
 115                                  _TIF_NOHZ | _TIF_SYSCALL_EMU)
 116
 117 #define INIT_THREAD_INFO(tsk)                                           \
 118 {                                                                       \
 119         .flags          = _TIF_FOREIGN_FPSTATE,                         \
 120         .preempt_count  = INIT_PREEMPT_COUNT,                           \
 121         .addr_limit     = KERNEL_DS,                                    \
 122 }
 123
 124 #endif /* __KERNEL__ */
 125 #endif /* __ASM_THREAD_INFO_H */