1 /* 2 * Based on arch/arm/include/asm/thread_info.h 3 * 4 * Copyright (C) 2002 Russell King. 5 * Copyright (C) 2012 ARM Ltd. 6 * 7 * This program is free software; you can redistribute it and/or modify 8 * it under the terms of the GNU General Public License version 2 as 9 * published by the Free Software Foundation. 10 * 11 * This program is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 * GNU General Public License for more details. 15 * 16 * You should have received a copy of the GNU General Public License 17 * along with this program. If not, see <http://www.gnu.org/licenses/>. 18 */ 19 #ifndef __ASM_THREAD_INFO_H 20 #define __ASM_THREAD_INFO_H 21 22 #ifdef __KERNEL__ 23 24 #include <linux/compiler.h> 25 26 #ifndef __ASSEMBLY__ 27 28 struct task_struct; 29 30 #include <asm/memory.h> 31 #include <asm/stack_pointer.h> 32 #include <asm/types.h> 33 34 typedef unsigned long mm_segment_t; 35 36 /* 37 * low level task data that entry.S needs immediate access to. 38 */ 39 struct thread_info { 40 unsigned long flags; /* low level flags */ 41 mm_segment_t addr_limit; /* address limit */ 42 #ifdef CONFIG_ARM64_SW_TTBR0_PAN 43 u64 ttbr0; /* saved TTBR0_EL1 */ 44 #endif 45 int preempt_count; /* 0 => preemptable, <0 => bug */ 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_SECOMP - syscall secure computing 68 * TIF_SIGPENDING - signal pending 69 * TIF_NEED_RESCHED - rescheduling necessary 70 * TIF_NOTIFY_RESUME - callback before returning to user 71 * TIF_USEDFPU - FPU was used by this task this quantum (SMP) 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_MEMDIE 18 /* is terminating due to OOM killer */ 85 #define TIF_FREEZE 19 86 #define TIF_RESTORE_SIGMASK 20 87 #define TIF_SINGLESTEP 21 88 #define TIF_32BIT 22 /* 32bit process */ 89 #define TIF_SVE 23 /* Scalable Vector Extension in use */ 90 #define TIF_SVE_VL_INHERIT 24 /* Inherit sve_vl_onexec across exec */ 91 #define TIF_SSBD 25 /* Wants SSB mitigation */ 92 93 #define _TIF_SIGPENDING (1 << TIF_SIGPENDING) 94 #define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED) 95 #define _TIF_NOTIFY_RESUME (1 << TIF_NOTIFY_RESUME) 96 #define _TIF_FOREIGN_FPSTATE (1 << TIF_FOREIGN_FPSTATE) 97 #define _TIF_NOHZ (1 << TIF_NOHZ) 98 #define _TIF_SYSCALL_TRACE (1 << TIF_SYSCALL_TRACE) 99 #define _TIF_SYSCALL_AUDIT (1 << TIF_SYSCALL_AUDIT) 100 #define _TIF_SYSCALL_TRACEPOINT (1 << TIF_SYSCALL_TRACEPOINT) 101 #define _TIF_SECCOMP (1 << TIF_SECCOMP) 102 #define _TIF_UPROBE (1 << TIF_UPROBE) 103 #define _TIF_FSCHECK (1 << TIF_FSCHECK) 104 #define _TIF_32BIT (1 << TIF_32BIT) 105 #define _TIF_SVE (1 << TIF_SVE) 106 107 #define _TIF_WORK_MASK (_TIF_NEED_RESCHED | _TIF_SIGPENDING | \ 108 _TIF_NOTIFY_RESUME | _TIF_FOREIGN_FPSTATE | \ 109 _TIF_UPROBE | _TIF_FSCHECK) 110 111 #define _TIF_SYSCALL_WORK (_TIF_SYSCALL_TRACE | _TIF_SYSCALL_AUDIT | \ 112 _TIF_SYSCALL_TRACEPOINT | _TIF_SECCOMP | \ 113 _TIF_NOHZ) 114 115 #define INIT_THREAD_INFO(tsk) \ 116 { \ 117 .flags = _TIF_FOREIGN_FPSTATE, \ 118 .preempt_count = INIT_PREEMPT_COUNT, \ 119 .addr_limit = KERNEL_DS, \ 120 } 121 122 #endif /* __KERNEL__ */ 123 #endif /* __ASM_THREAD_INFO_H */ 124
