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 #if defined(CONFIG_KASAN) || defined(CONFIG_KMSAN)
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 */
39 struct thread_info {
40 unsigned long flags; /* low level flags */
41 unsigned long syscall_work; /* SYSCALL_WORK_ flags */
42 unsigned int cpu; /* current CPU */
43 unsigned char sie; /* running in SIE context */
44 };
45
46 /*
47 * macros/functions for gaining access to the thread information structure
48 */
49 #define INIT_THREAD_INFO(tsk) \
50 { \
51 .flags = 0, \
52 }
53
54 struct task_struct;
55
56 void arch_setup_new_exec(void);
57 #define arch_setup_new_exec arch_setup_new_exec
58
59 #endif
60
61 /*
62 * thread information flags bit numbers
63 */
64 /* _TIF_WORK bits */
65 #define TIF_NOTIFY_RESUME 0 /* callback before returning to user */
66 #define TIF_SIGPENDING 1 /* signal pending */
67 #define TIF_NEED_RESCHED 2 /* rescheduling necessary */
68 #define TIF_UPROBE 3 /* breakpointed or single-stepping */
69 #define TIF_GUARDED_STORAGE 4 /* load guarded storage control block */
70 #define TIF_PATCH_PENDING 5 /* pending live patching update */
71 #define TIF_PGSTE 6 /* New mm's will use 4K page tables */
72 #define TIF_NOTIFY_SIGNAL 7 /* signal notifications exist */
73 #define TIF_ISOLATE_BP_GUEST 9 /* Run KVM guests with isolated BP */
74 #define TIF_PER_TRAP 10 /* Need to handle PER trap on exit to usermode */
75
76 #define TIF_31BIT 16 /* 32bit process */
77 #define TIF_MEMDIE 17 /* is terminating due to OOM killer */
78 #define TIF_RESTORE_SIGMASK 18 /* restore signal mask in do_signal() */
79 #define TIF_SINGLE_STEP 19 /* This task is single stepped */
80 #define TIF_BLOCK_STEP 20 /* This task is block stepped */
81 #define TIF_UPROBE_SINGLESTEP 21 /* This task is uprobe single stepped */
82
83 /* _TIF_TRACE bits */
84 #define TIF_SYSCALL_TRACE 24 /* syscall trace active */
85 #define TIF_SYSCALL_AUDIT 25 /* syscall auditing active */
86 #define TIF_SECCOMP 26 /* secure computing */
87 #define TIF_SYSCALL_TRACEPOINT 27 /* syscall tracepoint instrumentation */
88
89 #define _TIF_NOTIFY_RESUME BIT(TIF_NOTIFY_RESUME)
90 #define _TIF_NOTIFY_SIGNAL BIT(TIF_NOTIFY_SIGNAL)
91 #define _TIF_SIGPENDING BIT(TIF_SIGPENDING)
92 #define _TIF_NEED_RESCHED BIT(TIF_NEED_RESCHED)
93 #define _TIF_UPROBE BIT(TIF_UPROBE)
94 #define _TIF_GUARDED_STORAGE BIT(TIF_GUARDED_STORAGE)
95 #define _TIF_PATCH_PENDING BIT(TIF_PATCH_PENDING)
96 #define _TIF_ISOLATE_BP_GUEST BIT(TIF_ISOLATE_BP_GUEST)
97 #define _TIF_PER_TRAP BIT(TIF_PER_TRAP)
98
99 #define _TIF_31BIT BIT(TIF_31BIT)
100 #define _TIF_SINGLE_STEP BIT(TIF_SINGLE_STEP)
101
102 #define _TIF_SYSCALL_TRACE BIT(TIF_SYSCALL_TRACE)
103 #define _TIF_SYSCALL_AUDIT BIT(TIF_SYSCALL_AUDIT)
104 #define _TIF_SECCOMP BIT(TIF_SECCOMP)
105 #define _TIF_SYSCALL_TRACEPOINT BIT(TIF_SYSCALL_TRACEPOINT)
106
107 #endif /* _ASM_THREAD_INFO_H */
108
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