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         u32                     cpu;
  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 #endif
  59
  60 #define TIF_SIGPENDING          0       /* signal pending */
  61 #define TIF_NEED_RESCHED        1       /* rescheduling necessary */
  62 #define TIF_NOTIFY_RESUME       2       /* callback before returning to user */
  63 #define TIF_FOREIGN_FPSTATE     3       /* CPU's FP state is not current's */
  64 #define TIF_UPROBE              4       /* uprobe breakpoint or singlestep */
  65 #define TIF_MTE_ASYNC_FAULT     5       /* MTE Asynchronous Tag Check Fault */
  66 #define TIF_NOTIFY_SIGNAL       6       /* signal notifications exist */
  67 #define TIF_SYSCALL_TRACE       8       /* syscall trace active */
  68 #define TIF_SYSCALL_AUDIT       9       /* syscall auditing */
  69 #define TIF_SYSCALL_TRACEPOINT  10      /* syscall tracepoint for ftrace */
  70 #define TIF_SECCOMP             11      /* syscall secure computing */
  71 #define TIF_SYSCALL_EMU         12      /* syscall emulation active */
  72 #define TIF_MEMDIE              18      /* is terminating due to OOM killer */
  73 #define TIF_FREEZE              19
  74 #define TIF_RESTORE_SIGMASK     20
  75 #define TIF_SINGLESTEP          21
  76 #define TIF_32BIT               22      /* 32bit process */
  77 #define TIF_SVE                 23      /* Scalable Vector Extension in use */
  78 #define TIF_SVE_VL_INHERIT      24      /* Inherit SVE vl_onexec across exec */
  79 #define TIF_SSBD                25      /* Wants SSB mitigation */
  80 #define TIF_TAGGED_ADDR         26      /* Allow tagged user addresses */
  81 #define TIF_SME                 27      /* SME in use */
  82 #define TIF_SME_VL_INHERIT      28      /* Inherit SME vl_onexec across exec */
  83 #define TIF_KERNEL_FPSTATE      29      /* Task is in a kernel mode FPSIMD section */
  84 #define TIF_TSC_SIGSEGV         30      /* SIGSEGV on counter-timer access */
  85
  86 #define _TIF_SIGPENDING         (1 << TIF_SIGPENDING)
  87 #define _TIF_NEED_RESCHED       (1 << TIF_NEED_RESCHED)
  88 #define _TIF_NOTIFY_RESUME      (1 << TIF_NOTIFY_RESUME)
  89 #define _TIF_FOREIGN_FPSTATE    (1 << TIF_FOREIGN_FPSTATE)
  90 #define _TIF_SYSCALL_TRACE      (1 << TIF_SYSCALL_TRACE)
  91 #define _TIF_SYSCALL_AUDIT      (1 << TIF_SYSCALL_AUDIT)
  92 #define _TIF_SYSCALL_TRACEPOINT (1 << TIF_SYSCALL_TRACEPOINT)
  93 #define _TIF_SECCOMP            (1 << TIF_SECCOMP)
  94 #define _TIF_SYSCALL_EMU        (1 << TIF_SYSCALL_EMU)
  95 #define _TIF_UPROBE             (1 << TIF_UPROBE)
  96 #define _TIF_SINGLESTEP         (1 << TIF_SINGLESTEP)
  97 #define _TIF_32BIT              (1 << TIF_32BIT)
  98 #define _TIF_SVE                (1 << TIF_SVE)
  99 #define _TIF_MTE_ASYNC_FAULT    (1 << TIF_MTE_ASYNC_FAULT)
 100 #define _TIF_NOTIFY_SIGNAL      (1 << TIF_NOTIFY_SIGNAL)
 101 #define _TIF_TSC_SIGSEGV        (1 << TIF_TSC_SIGSEGV)
 102
 103 #define _TIF_WORK_MASK          (_TIF_NEED_RESCHED | _TIF_SIGPENDING | \
 104                                  _TIF_NOTIFY_RESUME | _TIF_FOREIGN_FPSTATE | \
 105                                  _TIF_UPROBE | _TIF_MTE_ASYNC_FAULT | \
 106                                  _TIF_NOTIFY_SIGNAL)
 107
 108 #define _TIF_SYSCALL_WORK       (_TIF_SYSCALL_TRACE | _TIF_SYSCALL_AUDIT | \
 109                                  _TIF_SYSCALL_TRACEPOINT | _TIF_SECCOMP | \
 110                                  _TIF_SYSCALL_EMU)
 111
 112 #ifdef CONFIG_SHADOW_CALL_STACK
 113 #define INIT_SCS                                                        \
 114         .scs_base       = init_shadow_call_stack,                       \
 115         .scs_sp         = init_shadow_call_stack,
 116 #else
 117 #define INIT_SCS
 118 #endif
 119
 120 #define INIT_THREAD_INFO(tsk)                                           \
 121 {                                                                       \
 122         .flags          = _TIF_FOREIGN_FPSTATE,                         \
 123         .preempt_count  = INIT_PREEMPT_COUNT,                           \
 124         INIT_SCS                                                        \
 125 }
 126
 127 #endif /* __ASM_THREAD_INFO_H */