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#include <vdso/page.h>
13
14/*
15 * General size of kernel stacks
16 */
17#if defined(CONFIG_KASAN) || defined(CONFIG_KMSAN)
18#define THREAD_SIZE_ORDER 4
19#else
20#define THREAD_SIZE_ORDER 2
21#endif
22#define BOOT_STACK_SIZE (PAGE_SIZE << 2)
23#define THREAD_SIZE (PAGE_SIZE << THREAD_SIZE_ORDER)
24
25#define STACK_INIT_OFFSET (THREAD_SIZE - STACK_FRAME_OVERHEAD - __PT_SIZE)
26
27#ifndef __ASSEMBLER__
28
29/*
30 * low level task data that entry.S needs immediate access to
31 * - this struct should fit entirely inside of one cache line
32 * - this struct shares the supervisor stack pages
33 * - if the contents of this structure are changed, the assembly constants must also be changed
34 */
35struct thread_info {
36 unsigned long flags; /* low level flags */
37 unsigned long syscall_work; /* SYSCALL_WORK_ flags */
38 unsigned int cpu; /* current CPU */
39 unsigned char sie; /* running in SIE context */
40};
41
42/*
43 * macros/functions for gaining access to the thread information structure
44 */
45#define INIT_THREAD_INFO(tsk) \
46{ \
47 .flags = 0, \
48}
49
50struct task_struct;
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 * Tell the generic TIF infrastructure which special bits s390 supports
61 */
62#define HAVE_TIF_NEED_RESCHED_LAZY
63#define HAVE_TIF_RESTORE_SIGMASK
64
65#include <asm-generic/thread_info_tif.h>
66
67/* Architecture specific bits */
68#define TIF_ASCE_PRIMARY 16 /* primary asce is kernel asce */
69#define TIF_GUARDED_STORAGE 17 /* load guarded storage control block */
70#define TIF_ISOLATE_BP_GUEST 18 /* Run KVM guests with isolated BP */
71#define TIF_PER_TRAP 19 /* Need to handle PER trap on exit to usermode */
72#define TIF_SINGLE_STEP 21 /* This task is single stepped */
73#define TIF_BLOCK_STEP 22 /* This task is block stepped */
74#define TIF_UPROBE_SINGLESTEP 23 /* This task is uprobe single stepped */
75
76#define _TIF_ASCE_PRIMARY BIT(TIF_ASCE_PRIMARY)
77#define _TIF_GUARDED_STORAGE BIT(TIF_GUARDED_STORAGE)
78#define _TIF_ISOLATE_BP_GUEST BIT(TIF_ISOLATE_BP_GUEST)
79#define _TIF_PER_TRAP BIT(TIF_PER_TRAP)
80#define _TIF_SINGLE_STEP BIT(TIF_SINGLE_STEP)
81#define _TIF_BLOCK_STEP BIT(TIF_BLOCK_STEP)
82#define _TIF_UPROBE_SINGLESTEP BIT(TIF_UPROBE_SINGLESTEP)
83
84#endif /* _ASM_THREAD_INFO_H */