LXR linux/arch/arm64/include/asm/thread

   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
  15struct task_struct;
  16
  17#include <asm/memory.h>
  18#include <asm/stack_pointer.h>
  19#include <asm/types.h>
  20
  21typedef unsigned long mm_segment_t;
  22
  23/*
  24 * low level task data that entry.S needs immediate access to.
  25 */
  26struct thread_info {
  27        unsigned long           flags;          /* low level flags */
  28        mm_segment_t            addr_limit;     /* address limit */
  29#ifdef CONFIG_ARM64_SW_TTBR0_PAN
  30        u64                     ttbr0;          /* saved TTBR0_EL1 */
  31#endif
  32        union {
  33                u64             preempt_count;  /* 0 => preemptible, <0 => bug */
  34                struct {
  35#ifdef CONFIG_CPU_BIG_ENDIAN
  36                        u32     need_resched;
  37                        u32     count;
  38#else
  39                        u32     count;
  40                        u32     need_resched;
  41#endif
  42                } preempt;
  43        };
  44};
  45
  46#define thread_saved_pc(tsk)    \
  47        ((unsigned long)(tsk->thread.cpu_context.pc))
  48#define thread_saved_sp(tsk)    \
  49        ((unsigned long)(tsk->thread.cpu_context.sp))
  50#define thread_saved_fp(tsk)    \
  51        ((unsigned long)(tsk->thread.cpu_context.fp))
  52
  53void arch_setup_new_exec(void);
  54#define arch_setup_new_exec     arch_setup_new_exec
  55
  56void arch_release_task_struct(struct task_struct *tsk);
  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_FSCHECK             5       /* Check FS is USER_DS on return */
  66#define TIF_NOHZ                7
  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
  82#define _TIF_SIGPENDING         (1 << TIF_SIGPENDING)
  83#define _TIF_NEED_RESCHED       (1 << TIF_NEED_RESCHED)
  84#define _TIF_NOTIFY_RESUME      (1 << TIF_NOTIFY_RESUME)
  85#define _TIF_FOREIGN_FPSTATE    (1 << TIF_FOREIGN_FPSTATE)
  86#define _TIF_NOHZ               (1 << TIF_NOHZ)
  87#define _TIF_SYSCALL_TRACE      (1 << TIF_SYSCALL_TRACE)
  88#define _TIF_SYSCALL_AUDIT      (1 << TIF_SYSCALL_AUDIT)
  89#define _TIF_SYSCALL_TRACEPOINT (1 << TIF_SYSCALL_TRACEPOINT)
  90#define _TIF_SECCOMP            (1 << TIF_SECCOMP)
  91#define _TIF_SYSCALL_EMU        (1 << TIF_SYSCALL_EMU)
  92#define _TIF_UPROBE             (1 << TIF_UPROBE)
  93#define _TIF_FSCHECK            (1 << TIF_FSCHECK)
  94#define _TIF_32BIT              (1 << TIF_32BIT)
  95#define _TIF_SVE                (1 << TIF_SVE)
  96
  97#define _TIF_WORK_MASK          (_TIF_NEED_RESCHED | _TIF_SIGPENDING | \
  98                                 _TIF_NOTIFY_RESUME | _TIF_FOREIGN_FPSTATE | \
  99                                 _TIF_UPROBE | _TIF_FSCHECK)
 100
 101#define _TIF_SYSCALL_WORK       (_TIF_SYSCALL_TRACE | _TIF_SYSCALL_AUDIT | \
 102                                 _TIF_SYSCALL_TRACEPOINT | _TIF_SECCOMP | \
 103                                 _TIF_NOHZ | _TIF_SYSCALL_EMU)
 104
 105#define INIT_THREAD_INFO(tsk)                                           \
 106{                                                                       \
 107        .flags          = _TIF_FOREIGN_FPSTATE,                         \
 108        .preempt_count  = INIT_PREEMPT_COUNT,                           \
 109        .addr_limit     = KERNEL_DS,                                    \
 110}
 111
 112#endif /* __ASM_THREAD_INFO_H */
 113