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 17 struct task_struct; 18 19 #include <asm/memory.h> 20 #include <asm/stack_pointer.h> 21 #include <asm/types.h> 22 23 typedef unsigned long mm_segment_t; 24 25 /* 26 * low level task data that entry.S needs immediate access to. 27 */ 28 struct 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 55 void arch_setup_new_exec(void); 56 #define arch_setup_new_exec arch_setup_new_exec 57 58 void 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_SIGPENDING - signal pending 69 * TIF_NEED_RESCHED - rescheduling necessary 70 * TIF_NOTIFY_RESUME - callback before returning to user 71 */ 72 #define TIF_SIGPENDING 0 73 #define TIF_NEED_RESCHED 1 74 #define TIF_NOTIFY_RESUME 2 /* callback before returning to user */ 75 #define TIF_FOREIGN_FPSTATE 3 /* CPU's FP state is not current's */ 76 #define TIF_UPROBE 4 /* uprobe breakpoint or singlestep */ 77 #define TIF_FSCHECK 5 /* Check FS is USER_DS on return */ 78 #define TIF_NOHZ 7 79 #define TIF_SYSCALL_TRACE 8 80 #define TIF_SYSCALL_AUDIT 9 81 #define TIF_SYSCALL_TRACEPOINT 10 82 #define TIF_SECCOMP 11 83 #define TIF_MEMDIE 18 /* is terminating due to OOM killer */ 84 #define TIF_FREEZE 19 85 #define TIF_RESTORE_SIGMASK 20 86 #define TIF_SINGLESTEP 21 87 #define TIF_32BIT 22 /* 32bit process */ 88 #define TIF_SVE 23 /* Scalable Vector Extension in use */ 89 #define TIF_SVE_VL_INHERIT 24 /* Inherit sve_vl_onexec across exec */ 90 #define TIF_SSBD 25 /* Wants SSB mitigation */ 91 92 #define _TIF_SIGPENDING (1 << TIF_SIGPENDING) 93 #define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED) 94 #define _TIF_NOTIFY_RESUME (1 << TIF_NOTIFY_RESUME) 95 #define _TIF_FOREIGN_FPSTATE (1 << TIF_FOREIGN_FPSTATE) 96 #define _TIF_NOHZ (1 << TIF_NOHZ) 97 #define _TIF_SYSCALL_TRACE (1 << TIF_SYSCALL_TRACE) 98 #define _TIF_SYSCALL_AUDIT (1 << TIF_SYSCALL_AUDIT) 99 #define _TIF_SYSCALL_TRACEPOINT (1 << TIF_SYSCALL_TRACEPOINT) 100 #define _TIF_SECCOMP (1 << TIF_SECCOMP) 101 #define _TIF_UPROBE (1 << TIF_UPROBE) 102 #define _TIF_FSCHECK (1 << TIF_FSCHECK) 103 #define _TIF_32BIT (1 << TIF_32BIT) 104 #define _TIF_SVE (1 << TIF_SVE) 105 106 #define _TIF_WORK_MASK (_TIF_NEED_RESCHED | _TIF_SIGPENDING | \ 107 _TIF_NOTIFY_RESUME | _TIF_FOREIGN_FPSTATE | \ 108 _TIF_UPROBE | _TIF_FSCHECK) 109 110 #define _TIF_SYSCALL_WORK (_TIF_SYSCALL_TRACE | _TIF_SYSCALL_AUDIT | \ 111 _TIF_SYSCALL_TRACEPOINT | _TIF_SECCOMP | \ 112 _TIF_NOHZ) 113 114 #define INIT_THREAD_INFO(tsk) \ 115 { \ 116 .flags = _TIF_FOREIGN_FPSTATE, \ 117 .preempt_count = INIT_PREEMPT_COUNT, \ 118 .addr_limit = KERNEL_DS, \ 119 } 120 121 #endif /* __KERNEL__ */ 122 #endif /* __ASM_THREAD_INFO_H */ 123