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 u32 cpu; 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 55 void arch_setup_new_exec(void); 56 #define arch_setup_new_exec arch_setup_new_exec 57 58 #endif 59 60 #define TIF_SIGPENDING 0 /* signal pending */ 61 #define TIF_NEED_RESCHED 1 /* rescheduling necessary */ 62 #define TIF_NEED_RESCHED_LAZY 2 /* Lazy rescheduling needed */ 63 #define TIF_NOTIFY_RESUME 3 /* callback before returning to user */ 64 #define TIF_FOREIGN_FPSTATE 4 /* CPU's FP state is not current's */ 65 #define TIF_UPROBE 5 /* uprobe breakpoint or singlestep */ 66 #define TIF_MTE_ASYNC_FAULT 6 /* MTE Asynchronous Tag Check Fault */ 67 #define TIF_NOTIFY_SIGNAL 7 /* signal notifications exist */ 68 #define TIF_SYSCALL_TRACE 8 /* syscall trace active */ 69 #define TIF_SYSCALL_AUDIT 9 /* syscall auditing */ 70 #define TIF_SYSCALL_TRACEPOINT 10 /* syscall tracepoint for ftrace */ 71 #define TIF_SECCOMP 11 /* syscall secure computing */ 72 #define TIF_SYSCALL_EMU 12 /* syscall emulation active */ 73 #define TIF_PATCH_PENDING 13 /* pending live patching update */ 74 #define TIF_MEMDIE 18 /* is terminating due to OOM killer */ 75 #define TIF_FREEZE 19 76 #define TIF_RESTORE_SIGMASK 20 77 #define TIF_SINGLESTEP 21 78 #define TIF_32BIT 22 /* 32bit process */ 79 #define TIF_SVE 23 /* Scalable Vector Extension in use */ 80 #define TIF_SVE_VL_INHERIT 24 /* Inherit SVE vl_onexec across exec */ 81 #define TIF_SSBD 25 /* Wants SSB mitigation */ 82 #define TIF_TAGGED_ADDR 26 /* Allow tagged user addresses */ 83 #define TIF_SME 27 /* SME in use */ 84 #define TIF_SME_VL_INHERIT 28 /* Inherit SME vl_onexec across exec */ 85 #define TIF_KERNEL_FPSTATE 29 /* Task is in a kernel mode FPSIMD section */ 86 #define TIF_TSC_SIGSEGV 30 /* SIGSEGV on counter-timer access */ 87 #define TIF_LAZY_MMU 31 /* Task in lazy mmu mode */ 88 #define TIF_LAZY_MMU_PENDING 32 /* Ops pending for lazy mmu mode exit */ 89 90 #define _TIF_SIGPENDING (1 << TIF_SIGPENDING) 91 #define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED) 92 #define _TIF_NEED_RESCHED_LAZY (1 << TIF_NEED_RESCHED_LAZY) 93 #define _TIF_NOTIFY_RESUME (1 << TIF_NOTIFY_RESUME) 94 #define _TIF_FOREIGN_FPSTATE (1 << TIF_FOREIGN_FPSTATE) 95 #define _TIF_SYSCALL_TRACE (1 << TIF_SYSCALL_TRACE) 96 #define _TIF_SYSCALL_AUDIT (1 << TIF_SYSCALL_AUDIT) 97 #define _TIF_SYSCALL_TRACEPOINT (1 << TIF_SYSCALL_TRACEPOINT) 98 #define _TIF_SECCOMP (1 << TIF_SECCOMP) 99 #define _TIF_SYSCALL_EMU (1 << TIF_SYSCALL_EMU) 100 #define _TIF_PATCH_PENDING (1 << TIF_PATCH_PENDING) 101 #define _TIF_UPROBE (1 << TIF_UPROBE) 102 #define _TIF_SINGLESTEP (1 << TIF_SINGLESTEP) 103 #define _TIF_32BIT (1 << TIF_32BIT) 104 #define _TIF_SVE (1 << TIF_SVE) 105 #define _TIF_MTE_ASYNC_FAULT (1 << TIF_MTE_ASYNC_FAULT) 106 #define _TIF_NOTIFY_SIGNAL (1 << TIF_NOTIFY_SIGNAL) 107 #define _TIF_TSC_SIGSEGV (1 << TIF_TSC_SIGSEGV) 108 109 #define _TIF_WORK_MASK (_TIF_NEED_RESCHED | _TIF_NEED_RESCHED_LAZY | \ 110 _TIF_NOTIFY_RESUME | _TIF_FOREIGN_FPSTATE | \ 111 _TIF_UPROBE | _TIF_MTE_ASYNC_FAULT | \ 112 _TIF_NOTIFY_SIGNAL | _TIF_SIGPENDING | \ 113 _TIF_PATCH_PENDING) 114 115 #define _TIF_SYSCALL_WORK (_TIF_SYSCALL_TRACE | _TIF_SYSCALL_AUDIT | \ 116 _TIF_SYSCALL_TRACEPOINT | _TIF_SECCOMP | \ 117 _TIF_SYSCALL_EMU) 118 119 #ifdef CONFIG_SHADOW_CALL_STACK 120 #define INIT_SCS \ 121 .scs_base = init_shadow_call_stack, \ 122 .scs_sp = init_shadow_call_stack, 123 #else 124 #define INIT_SCS 125 #endif 126 127 #define INIT_THREAD_INFO(tsk) \ 128 { \ 129 .flags = _TIF_FOREIGN_FPSTATE, \ 130 .preempt_count = INIT_PREEMPT_COUNT, \ 131 INIT_SCS \ 132 } 133 134 #endif /* __ASM_THREAD_INFO_H */ 135