Linux kernel mirror (for testing)
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linux
1/*
2 * S390 version
3 * Copyright IBM Corp. 2002, 2006
4 * Author(s): Martin Schwidefsky (schwidefsky@de.ibm.com)
5 */
6
7#ifndef _ASM_THREAD_INFO_H
8#define _ASM_THREAD_INFO_H
9
10#include <linux/const.h>
11
12/*
13 * Size of kernel stack for each process
14 */
15#define THREAD_SIZE_ORDER 2
16#define ASYNC_ORDER 2
17
18#define THREAD_SIZE (PAGE_SIZE << THREAD_SIZE_ORDER)
19#define ASYNC_SIZE (PAGE_SIZE << ASYNC_ORDER)
20
21#ifndef __ASSEMBLY__
22#include <asm/lowcore.h>
23#include <asm/page.h>
24#include <asm/processor.h>
25
26/*
27 * low level task data that entry.S needs immediate access to
28 * - this struct should fit entirely inside of one cache line
29 * - this struct shares the supervisor stack pages
30 * - if the contents of this structure are changed, the assembly constants must also be changed
31 */
32struct thread_info {
33 unsigned long flags; /* low level flags */
34};
35
36/*
37 * macros/functions for gaining access to the thread information structure
38 */
39#define INIT_THREAD_INFO(tsk) \
40{ \
41 .flags = 0, \
42}
43
44#define init_stack (init_thread_union.stack)
45
46void arch_release_task_struct(struct task_struct *tsk);
47int arch_dup_task_struct(struct task_struct *dst, struct task_struct *src);
48
49#endif
50
51/*
52 * thread information flags bit numbers
53 */
54/* _TIF_WORK bits */
55#define TIF_NOTIFY_RESUME 0 /* callback before returning to user */
56#define TIF_SIGPENDING 1 /* signal pending */
57#define TIF_NEED_RESCHED 2 /* rescheduling necessary */
58#define TIF_UPROBE 3 /* breakpointed or single-stepping */
59#define TIF_GUARDED_STORAGE 4 /* load guarded storage control block */
60#define TIF_PATCH_PENDING 5 /* pending live patching update */
61
62#define TIF_31BIT 16 /* 32bit process */
63#define TIF_MEMDIE 17 /* is terminating due to OOM killer */
64#define TIF_RESTORE_SIGMASK 18 /* restore signal mask in do_signal() */
65#define TIF_SINGLE_STEP 19 /* This task is single stepped */
66#define TIF_BLOCK_STEP 20 /* This task is block stepped */
67#define TIF_UPROBE_SINGLESTEP 21 /* This task is uprobe single stepped */
68
69/* _TIF_TRACE bits */
70#define TIF_SYSCALL_TRACE 24 /* syscall trace active */
71#define TIF_SYSCALL_AUDIT 25 /* syscall auditing active */
72#define TIF_SECCOMP 26 /* secure computing */
73#define TIF_SYSCALL_TRACEPOINT 27 /* syscall tracepoint instrumentation */
74
75#define _TIF_NOTIFY_RESUME _BITUL(TIF_NOTIFY_RESUME)
76#define _TIF_SIGPENDING _BITUL(TIF_SIGPENDING)
77#define _TIF_NEED_RESCHED _BITUL(TIF_NEED_RESCHED)
78#define _TIF_UPROBE _BITUL(TIF_UPROBE)
79#define _TIF_GUARDED_STORAGE _BITUL(TIF_GUARDED_STORAGE)
80#define _TIF_PATCH_PENDING _BITUL(TIF_PATCH_PENDING)
81
82#define _TIF_31BIT _BITUL(TIF_31BIT)
83#define _TIF_SINGLE_STEP _BITUL(TIF_SINGLE_STEP)
84
85#define _TIF_SYSCALL_TRACE _BITUL(TIF_SYSCALL_TRACE)
86#define _TIF_SYSCALL_AUDIT _BITUL(TIF_SYSCALL_AUDIT)
87#define _TIF_SECCOMP _BITUL(TIF_SECCOMP)
88#define _TIF_SYSCALL_TRACEPOINT _BITUL(TIF_SYSCALL_TRACEPOINT)
89
90#endif /* _ASM_THREAD_INFO_H */