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