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

   1/*
   2 * Based on arch/arm/include/asm/thread_info.h
   3 *
   4 * Copyright (C) 2002 Russell King.
   5 * Copyright (C) 2012 ARM Ltd.
   6 *
   7 * This program is free software; you can redistribute it and/or modify
   8 * it under the terms of the GNU General Public License version 2 as
   9 * published by the Free Software Foundation.
  10 *
  11 * This program is distributed in the hope that it will be useful,
  12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 * GNU General Public License for more details.
  15 *
  16 * You should have received a copy of the GNU General Public License
  17 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  18 */
  19#ifndef __ASM_THREAD_INFO_H
  20#define __ASM_THREAD_INFO_H
  21
  22#ifdef __KERNEL__
  23
  24#include <linux/compiler.h>
  25
  26#ifndef __ASSEMBLY__
  27
  28struct task_struct;
  29
  30#include <asm/memory.h>
  31#include <asm/stack_pointer.h>
  32#include <asm/types.h>
  33
  34typedef unsigned long mm_segment_t;
  35
  36/*
  37 * low level task data that entry.S needs immediate access to.
  38 */
  39struct thread_info {
  40        unsigned long           flags;          /* low level flags */
  41        mm_segment_t            addr_limit;     /* address limit */
  42#ifdef CONFIG_ARM64_SW_TTBR0_PAN
  43        u64                     ttbr0;          /* saved TTBR0_EL1 */
  44#endif
  45        int                     preempt_count;  /* 0 => preemptable, <0 => bug */
  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
  55void arch_setup_new_exec(void);
  56#define arch_setup_new_exec     arch_setup_new_exec
  57
  58void 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_SECOMP          - syscall secure computing
  68 *  TIF_SIGPENDING      - signal pending
  69 *  TIF_NEED_RESCHED    - rescheduling necessary
  70 *  TIF_NOTIFY_RESUME   - callback before returning to user
  71 *  TIF_USEDFPU         - FPU was used by this task this quantum (SMP)
  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_MEMDIE              18      /* is terminating due to OOM killer */
  85#define TIF_FREEZE              19
  86#define TIF_RESTORE_SIGMASK     20
  87#define TIF_SINGLESTEP          21
  88#define TIF_32BIT               22      /* 32bit process */
  89#define TIF_SVE                 23      /* Scalable Vector Extension in use */
  90#define TIF_SVE_VL_INHERIT      24      /* Inherit sve_vl_onexec across exec */
  91#define TIF_SSBD                25      /* Wants SSB mitigation */
  92
  93#define _TIF_SIGPENDING         (1 << TIF_SIGPENDING)
  94#define _TIF_NEED_RESCHED       (1 << TIF_NEED_RESCHED)
  95#define _TIF_NOTIFY_RESUME      (1 << TIF_NOTIFY_RESUME)
  96#define _TIF_FOREIGN_FPSTATE    (1 << TIF_FOREIGN_FPSTATE)
  97#define _TIF_NOHZ               (1 << TIF_NOHZ)
  98#define _TIF_SYSCALL_TRACE      (1 << TIF_SYSCALL_TRACE)
  99#define _TIF_SYSCALL_AUDIT      (1 << TIF_SYSCALL_AUDIT)
 100#define _TIF_SYSCALL_TRACEPOINT (1 << TIF_SYSCALL_TRACEPOINT)
 101#define _TIF_SECCOMP            (1 << TIF_SECCOMP)
 102#define _TIF_UPROBE             (1 << TIF_UPROBE)
 103#define _TIF_FSCHECK            (1 << TIF_FSCHECK)
 104#define _TIF_32BIT              (1 << TIF_32BIT)
 105#define _TIF_SVE                (1 << TIF_SVE)
 106
 107#define _TIF_WORK_MASK          (_TIF_NEED_RESCHED | _TIF_SIGPENDING | \
 108                                 _TIF_NOTIFY_RESUME | _TIF_FOREIGN_FPSTATE | \
 109                                 _TIF_UPROBE | _TIF_FSCHECK)
 110
 111#define _TIF_SYSCALL_WORK       (_TIF_SYSCALL_TRACE | _TIF_SYSCALL_AUDIT | \
 112                                 _TIF_SYSCALL_TRACEPOINT | _TIF_SECCOMP | \
 113                                 _TIF_NOHZ)
 114
 115#define INIT_THREAD_INFO(tsk)                                           \
 116{                                                                       \
 117        .flags          = _TIF_FOREIGN_FPSTATE,                         \
 118        .preempt_count  = INIT_PREEMPT_COUNT,                           \
 119        .addr_limit     = KERNEL_DS,                                    \
 120}
 121
 122#endif /* __KERNEL__ */
 123#endif /* __ASM_THREAD_INFO_H */
 124