Linux kernel mirror (for testing)
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1/* SPDX-License-Identifier: GPL-2.0 */
2/*
3 * S390 version
4 * Copyright IBM Corp. 2002, 2006
5 * Author(s): Martin Schwidefsky (schwidefsky@de.ibm.com)
6 */
7
8#ifndef _ASM_THREAD_INFO_H
9#define _ASM_THREAD_INFO_H
10
11#include <linux/bits.h>
12
13/*
14 * General size of kernel stacks
15 */
16#ifdef CONFIG_KASAN
17#define THREAD_SIZE_ORDER 4
18#else
19#define THREAD_SIZE_ORDER 2
20#endif
21#define BOOT_STACK_SIZE (PAGE_SIZE << 2)
22#define THREAD_SIZE (PAGE_SIZE << THREAD_SIZE_ORDER)
23
24#ifndef __ASSEMBLY__
25#include <asm/lowcore.h>
26#include <asm/page.h>
27
28#define STACK_INIT_OFFSET \
29 (THREAD_SIZE - STACK_FRAME_OVERHEAD - sizeof(struct pt_regs))
30
31/*
32 * low level task data that entry.S needs immediate access to
33 * - this struct should fit entirely inside of one cache line
34 * - this struct shares the supervisor stack pages
35 * - if the contents of this structure are changed, the assembly constants must also be changed
36 */
37struct thread_info {
38 unsigned long flags; /* low level flags */
39 unsigned long syscall_work; /* SYSCALL_WORK_ flags */
40 unsigned int cpu; /* current CPU */
41};
42
43/*
44 * macros/functions for gaining access to the thread information structure
45 */
46#define INIT_THREAD_INFO(tsk) \
47{ \
48 .flags = 0, \
49}
50
51struct task_struct;
52
53void arch_release_task_struct(struct task_struct *tsk);
54int arch_dup_task_struct(struct task_struct *dst, struct task_struct *src);
55
56void arch_setup_new_exec(void);
57#define arch_setup_new_exec arch_setup_new_exec
58
59#endif
60
61/*
62 * thread information flags bit numbers
63 */
64/* _TIF_WORK bits */
65#define TIF_NOTIFY_RESUME 0 /* callback before returning to user */
66#define TIF_SIGPENDING 1 /* signal pending */
67#define TIF_NEED_RESCHED 2 /* rescheduling necessary */
68#define TIF_UPROBE 3 /* breakpointed or single-stepping */
69#define TIF_GUARDED_STORAGE 4 /* load guarded storage control block */
70#define TIF_PATCH_PENDING 5 /* pending live patching update */
71#define TIF_PGSTE 6 /* New mm's will use 4K page tables */
72#define TIF_NOTIFY_SIGNAL 7 /* signal notifications exist */
73#define TIF_ISOLATE_BP 8 /* Run process with isolated BP */
74#define TIF_ISOLATE_BP_GUEST 9 /* Run KVM guests with isolated BP */
75#define TIF_PER_TRAP 10 /* Need to handle PER trap on exit to usermode */
76
77#define TIF_31BIT 16 /* 32bit process */
78#define TIF_MEMDIE 17 /* is terminating due to OOM killer */
79#define TIF_RESTORE_SIGMASK 18 /* restore signal mask in do_signal() */
80#define TIF_SINGLE_STEP 19 /* This task is single stepped */
81#define TIF_BLOCK_STEP 20 /* This task is block stepped */
82#define TIF_UPROBE_SINGLESTEP 21 /* This task is uprobe single stepped */
83
84/* _TIF_TRACE bits */
85#define TIF_SYSCALL_TRACE 24 /* syscall trace active */
86#define TIF_SYSCALL_AUDIT 25 /* syscall auditing active */
87#define TIF_SECCOMP 26 /* secure computing */
88#define TIF_SYSCALL_TRACEPOINT 27 /* syscall tracepoint instrumentation */
89
90#define _TIF_NOTIFY_RESUME BIT(TIF_NOTIFY_RESUME)
91#define _TIF_NOTIFY_SIGNAL BIT(TIF_NOTIFY_SIGNAL)
92#define _TIF_SIGPENDING BIT(TIF_SIGPENDING)
93#define _TIF_NEED_RESCHED BIT(TIF_NEED_RESCHED)
94#define _TIF_UPROBE BIT(TIF_UPROBE)
95#define _TIF_GUARDED_STORAGE BIT(TIF_GUARDED_STORAGE)
96#define _TIF_PATCH_PENDING BIT(TIF_PATCH_PENDING)
97#define _TIF_ISOLATE_BP BIT(TIF_ISOLATE_BP)
98#define _TIF_ISOLATE_BP_GUEST BIT(TIF_ISOLATE_BP_GUEST)
99#define _TIF_PER_TRAP BIT(TIF_PER_TRAP)
100
101#define _TIF_31BIT BIT(TIF_31BIT)
102#define _TIF_SINGLE_STEP BIT(TIF_SINGLE_STEP)
103
104#define _TIF_SYSCALL_TRACE BIT(TIF_SYSCALL_TRACE)
105#define _TIF_SYSCALL_AUDIT BIT(TIF_SYSCALL_AUDIT)
106#define _TIF_SECCOMP BIT(TIF_SECCOMP)
107#define _TIF_SYSCALL_TRACEPOINT BIT(TIF_SYSCALL_TRACEPOINT)
108
109#endif /* _ASM_THREAD_INFO_H */