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Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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linux
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
28struct task_struct;
29
30#include <asm/memory.h>
31#include <asm/stack_pointer.h>
32#include <asm/types.h>
33
34typedef unsigned long mm_segment_t;
35
36/*
37 * low level task data that entry.S needs immediate access to.
38 */
39struct 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
55void arch_setup_new_exec(void);
56#define arch_setup_new_exec arch_setup_new_exec
57
58void 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 */