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_setup_new_exec(void);
56#define arch_setup_new_exec arch_setup_new_exec
57
58#endif
59
60/*
61 * thread information flags bit numbers
62 */
63/* _TIF_WORK bits */
64#define TIF_NOTIFY_RESUME	0	/* callback before returning to user */
65#define TIF_SIGPENDING		1	/* signal pending */
66#define TIF_NEED_RESCHED	2	/* rescheduling necessary */
67#define TIF_UPROBE		3	/* breakpointed or single-stepping */
68#define TIF_GUARDED_STORAGE	4	/* load guarded storage control block */
69#define TIF_PATCH_PENDING	5	/* pending live patching update */
70#define TIF_PGSTE		6	/* New mm's will use 4K page tables */
71#define TIF_NOTIFY_SIGNAL	7	/* signal notifications exist */
72#define TIF_ISOLATE_BP_GUEST	9	/* Run KVM guests with isolated BP */
73#define TIF_PER_TRAP		10	/* Need to handle PER trap on exit to usermode */
74
75#define TIF_31BIT		16	/* 32bit process */
76#define TIF_MEMDIE		17	/* is terminating due to OOM killer */
77#define TIF_RESTORE_SIGMASK	18	/* restore signal mask in do_signal() */
78#define TIF_SINGLE_STEP		19	/* This task is single stepped */
79#define TIF_BLOCK_STEP		20	/* This task is block stepped */
80#define TIF_UPROBE_SINGLESTEP	21	/* This task is uprobe single stepped */
81
82/* _TIF_TRACE bits */
83#define TIF_SYSCALL_TRACE	24	/* syscall trace active */
84#define TIF_SYSCALL_AUDIT	25	/* syscall auditing active */
85#define TIF_SECCOMP		26	/* secure computing */
86#define TIF_SYSCALL_TRACEPOINT	27	/* syscall tracepoint instrumentation */
87
88#define _TIF_NOTIFY_RESUME	BIT(TIF_NOTIFY_RESUME)
89#define _TIF_NOTIFY_SIGNAL	BIT(TIF_NOTIFY_SIGNAL)
90#define _TIF_SIGPENDING		BIT(TIF_SIGPENDING)
91#define _TIF_NEED_RESCHED	BIT(TIF_NEED_RESCHED)
92#define _TIF_UPROBE		BIT(TIF_UPROBE)
93#define _TIF_GUARDED_STORAGE	BIT(TIF_GUARDED_STORAGE)
94#define _TIF_PATCH_PENDING	BIT(TIF_PATCH_PENDING)
95#define _TIF_ISOLATE_BP_GUEST	BIT(TIF_ISOLATE_BP_GUEST)
96#define _TIF_PER_TRAP		BIT(TIF_PER_TRAP)
97
98#define _TIF_31BIT		BIT(TIF_31BIT)
99#define _TIF_SINGLE_STEP	BIT(TIF_SINGLE_STEP)
100
101#define _TIF_SYSCALL_TRACE	BIT(TIF_SYSCALL_TRACE)
102#define _TIF_SYSCALL_AUDIT	BIT(TIF_SYSCALL_AUDIT)
103#define _TIF_SECCOMP		BIT(TIF_SECCOMP)
104#define _TIF_SYSCALL_TRACEPOINT	BIT(TIF_SYSCALL_TRACEPOINT)
105
106#endif /* _ASM_THREAD_INFO_H */
107