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#ifdef CONFIG_ARM64_4K_PAGES 27#define THREAD_SIZE_ORDER 2 28#elif defined(CONFIG_ARM64_16K_PAGES) 29#define THREAD_SIZE_ORDER 0 30#endif 31 32#define THREAD_SIZE 16384 33#define THREAD_START_SP (THREAD_SIZE - 16) 34 35#ifndef __ASSEMBLY__ 36 37struct task_struct; 38 39#include <asm/stack_pointer.h> 40#include <asm/types.h> 41 42typedef unsigned long mm_segment_t; 43 44/* 45 * low level task data that entry.S needs immediate access to. 46 */ 47struct thread_info { 48 unsigned long flags; /* low level flags */ 49 mm_segment_t addr_limit; /* address limit */ 50#ifdef CONFIG_ARM64_SW_TTBR0_PAN 51 u64 ttbr0; /* saved TTBR0_EL1 */ 52#endif 53 int preempt_count; /* 0 => preemptable, <0 => bug */ 54}; 55 56#define INIT_THREAD_INFO(tsk) \ 57{ \ 58 .preempt_count = INIT_PREEMPT_COUNT, \ 59 .addr_limit = KERNEL_DS, \ 60} 61 62#define init_stack (init_thread_union.stack) 63 64#define thread_saved_pc(tsk) \ 65 ((unsigned long)(tsk->thread.cpu_context.pc)) 66#define thread_saved_sp(tsk) \ 67 ((unsigned long)(tsk->thread.cpu_context.sp)) 68#define thread_saved_fp(tsk) \ 69 ((unsigned long)(tsk->thread.cpu_context.fp)) 70 71#endif 72 73/* 74 * thread information flags: 75 * TIF_SYSCALL_TRACE - syscall trace active 76 * TIF_SYSCALL_TRACEPOINT - syscall tracepoint for ftrace 77 * TIF_SYSCALL_AUDIT - syscall auditing 78 * TIF_SECOMP - syscall secure computing 79 * TIF_SIGPENDING - signal pending 80 * TIF_NEED_RESCHED - rescheduling necessary 81 * TIF_NOTIFY_RESUME - callback before returning to user 82 * TIF_USEDFPU - FPU was used by this task this quantum (SMP) 83 */ 84#define TIF_SIGPENDING 0 85#define TIF_NEED_RESCHED 1 86#define TIF_NOTIFY_RESUME 2 /* callback before returning to user */ 87#define TIF_FOREIGN_FPSTATE 3 /* CPU's FP state is not current's */ 88#define TIF_UPROBE 4 /* uprobe breakpoint or singlestep */ 89#define TIF_NOHZ 7 90#define TIF_SYSCALL_TRACE 8 91#define TIF_SYSCALL_AUDIT 9 92#define TIF_SYSCALL_TRACEPOINT 10 93#define TIF_SECCOMP 11 94#define TIF_MEMDIE 18 /* is terminating due to OOM killer */ 95#define TIF_FREEZE 19 96#define TIF_RESTORE_SIGMASK 20 97#define TIF_SINGLESTEP 21 98#define TIF_32BIT 22 /* 32bit process */ 99 100#define _TIF_SIGPENDING (1 << TIF_SIGPENDING) 101#define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED) 102#define _TIF_NOTIFY_RESUME (1 << TIF_NOTIFY_RESUME) 103#define _TIF_FOREIGN_FPSTATE (1 << TIF_FOREIGN_FPSTATE) 104#define _TIF_NOHZ (1 << TIF_NOHZ) 105#define _TIF_SYSCALL_TRACE (1 << TIF_SYSCALL_TRACE) 106#define _TIF_SYSCALL_AUDIT (1 << TIF_SYSCALL_AUDIT) 107#define _TIF_SYSCALL_TRACEPOINT (1 << TIF_SYSCALL_TRACEPOINT) 108#define _TIF_SECCOMP (1 << TIF_SECCOMP) 109#define _TIF_UPROBE (1 << TIF_UPROBE) 110#define _TIF_32BIT (1 << TIF_32BIT) 111 112#define _TIF_WORK_MASK (_TIF_NEED_RESCHED | _TIF_SIGPENDING | \ 113 _TIF_NOTIFY_RESUME | _TIF_FOREIGN_FPSTATE | \ 114 _TIF_UPROBE) 115 116#define _TIF_SYSCALL_WORK (_TIF_SYSCALL_TRACE | _TIF_SYSCALL_AUDIT | \ 117 _TIF_SYSCALL_TRACEPOINT | _TIF_SECCOMP | \ 118 _TIF_NOHZ) 119 120#endif /* __KERNEL__ */ 121#endif /* __ASM_THREAD_INFO_H */ 122