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 21/* 22 * low level task data that entry.S needs immediate access to. 23 */ 24struct 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 54void arch_setup_new_exec(void); 55#define arch_setup_new_exec arch_setup_new_exec 56 57void arch_release_task_struct(struct task_struct *tsk); 58int 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 */ 126