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_ORDER  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};
40
41/*
42 * macros/functions for gaining access to the thread information structure
43 */
44#define INIT_THREAD_INFO(tsk)			\
45{						\
46	.flags		= 0,			\
47}
48
49void arch_release_task_struct(struct task_struct *tsk);
50int arch_dup_task_struct(struct task_struct *dst, struct task_struct *src);
51
52void arch_setup_new_exec(void);
53#define arch_setup_new_exec arch_setup_new_exec
54
55#endif
56
57/*
58 * thread information flags bit numbers
59 */
60/* _TIF_WORK bits */
61#define TIF_NOTIFY_RESUME	0	/* callback before returning to user */
62#define TIF_SIGPENDING		1	/* signal pending */
63#define TIF_NEED_RESCHED	2	/* rescheduling necessary */
64#define TIF_UPROBE		3	/* breakpointed or single-stepping */
65#define TIF_GUARDED_STORAGE	4	/* load guarded storage control block */
66#define TIF_PATCH_PENDING	5	/* pending live patching update */
67#define TIF_PGSTE		6	/* New mm's will use 4K page tables */
68#define TIF_NOTIFY_SIGNAL	7	/* signal notifications exist */
69#define TIF_ISOLATE_BP		8	/* Run process with isolated BP */
70#define TIF_ISOLATE_BP_GUEST	9	/* Run KVM guests with isolated BP */
71
72#define TIF_31BIT		16	/* 32bit process */
73#define TIF_MEMDIE		17	/* is terminating due to OOM killer */
74#define TIF_RESTORE_SIGMASK	18	/* restore signal mask in do_signal() */
75#define TIF_SINGLE_STEP		19	/* This task is single stepped */
76#define TIF_BLOCK_STEP		20	/* This task is block stepped */
77#define TIF_UPROBE_SINGLESTEP	21	/* This task is uprobe single stepped */
78
79/* _TIF_TRACE bits */
80#define TIF_SYSCALL_TRACE	24	/* syscall trace active */
81#define TIF_SYSCALL_AUDIT	25	/* syscall auditing active */
82#define TIF_SECCOMP		26	/* secure computing */
83#define TIF_SYSCALL_TRACEPOINT	27	/* syscall tracepoint instrumentation */
84
85#define _TIF_NOTIFY_RESUME	BIT(TIF_NOTIFY_RESUME)
86#define _TIF_NOTIFY_SIGNAL	BIT(TIF_NOTIFY_SIGNAL)
87#define _TIF_SIGPENDING		BIT(TIF_SIGPENDING)
88#define _TIF_NEED_RESCHED	BIT(TIF_NEED_RESCHED)
89#define _TIF_UPROBE		BIT(TIF_UPROBE)
90#define _TIF_GUARDED_STORAGE	BIT(TIF_GUARDED_STORAGE)
91#define _TIF_PATCH_PENDING	BIT(TIF_PATCH_PENDING)
92#define _TIF_ISOLATE_BP		BIT(TIF_ISOLATE_BP)
93#define _TIF_ISOLATE_BP_GUEST	BIT(TIF_ISOLATE_BP_GUEST)
94
95#define _TIF_31BIT		BIT(TIF_31BIT)
96#define _TIF_SINGLE_STEP	BIT(TIF_SINGLE_STEP)
97
98#define _TIF_SYSCALL_TRACE	BIT(TIF_SYSCALL_TRACE)
99#define _TIF_SYSCALL_AUDIT	BIT(TIF_SYSCALL_AUDIT)
100#define _TIF_SECCOMP		BIT(TIF_SECCOMP)
101#define _TIF_SYSCALL_TRACEPOINT	BIT(TIF_SYSCALL_TRACEPOINT)
102
103#endif /* _ASM_THREAD_INFO_H */
104