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