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 }; 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 54 void arch_setup_new_exec(void); 55 #define arch_setup_new_exec arch_setup_new_exec 56 57 void arch_release_task_struct(struct task_struct *tsk); 58 int 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