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 17struct task_struct; 18 19#include <asm/memory.h> 20#include <asm/stack_pointer.h> 21#include <asm/types.h> 22 23typedef unsigned long mm_segment_t; 24 25/* 26 * low level task data that entry.S needs immediate access to. 27 */ 28struct 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 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_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 */ 126