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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
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_SIZE (PAGE_SIZE << 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 unsigned long syscall_work; /* SYSCALL_WORK_ flags */
40 unsigned int cpu; /* current CPU */
41};
42
43/*
44 * macros/functions for gaining access to the thread information structure
45 */
46#define INIT_THREAD_INFO(tsk) \
47{ \
48 .flags = 0, \
49}
50
51struct task_struct;
52
53void arch_release_task_struct(struct task_struct *tsk);
54int arch_dup_task_struct(struct task_struct *dst, struct task_struct *src);
55
56void 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 8 /* Run process with isolated BP */
74#define TIF_ISOLATE_BP_GUEST 9 /* Run KVM guests with isolated BP */
75#define TIF_PER_TRAP 10 /* Need to handle PER trap on exit to usermode */
76
77#define TIF_31BIT 16 /* 32bit process */
78#define TIF_MEMDIE 17 /* is terminating due to OOM killer */
79#define TIF_RESTORE_SIGMASK 18 /* restore signal mask in do_signal() */
80#define TIF_SINGLE_STEP 19 /* This task is single stepped */
81#define TIF_BLOCK_STEP 20 /* This task is block stepped */
82#define TIF_UPROBE_SINGLESTEP 21 /* This task is uprobe single stepped */
83
84/* _TIF_TRACE bits */
85#define TIF_SYSCALL_TRACE 24 /* syscall trace active */
86#define TIF_SYSCALL_AUDIT 25 /* syscall auditing active */
87#define TIF_SECCOMP 26 /* secure computing */
88#define TIF_SYSCALL_TRACEPOINT 27 /* syscall tracepoint instrumentation */
89
90#define _TIF_NOTIFY_RESUME BIT(TIF_NOTIFY_RESUME)
91#define _TIF_NOTIFY_SIGNAL BIT(TIF_NOTIFY_SIGNAL)
92#define _TIF_SIGPENDING BIT(TIF_SIGPENDING)
93#define _TIF_NEED_RESCHED BIT(TIF_NEED_RESCHED)
94#define _TIF_UPROBE BIT(TIF_UPROBE)
95#define _TIF_GUARDED_STORAGE BIT(TIF_GUARDED_STORAGE)
96#define _TIF_PATCH_PENDING BIT(TIF_PATCH_PENDING)
97#define _TIF_ISOLATE_BP BIT(TIF_ISOLATE_BP)
98#define _TIF_ISOLATE_BP_GUEST BIT(TIF_ISOLATE_BP_GUEST)
99#define _TIF_PER_TRAP BIT(TIF_PER_TRAP)
100
101#define _TIF_31BIT BIT(TIF_31BIT)
102#define _TIF_SINGLE_STEP BIT(TIF_SINGLE_STEP)
103
104#define _TIF_SYSCALL_TRACE BIT(TIF_SYSCALL_TRACE)
105#define _TIF_SYSCALL_AUDIT BIT(TIF_SYSCALL_AUDIT)
106#define _TIF_SECCOMP BIT(TIF_SECCOMP)
107#define _TIF_SYSCALL_TRACEPOINT BIT(TIF_SYSCALL_TRACEPOINT)
108
109#endif /* _ASM_THREAD_INFO_H */
1/*
2 * include/asm-s390/thread_info.h
3 *
4 * S390 version
5 * Copyright (C) IBM Corp. 2002,2006
6 * Author(s): Martin Schwidefsky (schwidefsky@de.ibm.com)
7 */
8
9#ifndef _ASM_THREAD_INFO_H
10#define _ASM_THREAD_INFO_H
11
12#ifdef __KERNEL__
13
14/*
15 * Size of kernel stack for each process
16 */
17#ifndef __s390x__
18#define THREAD_ORDER 1
19#define ASYNC_ORDER 1
20#else /* __s390x__ */
21#ifndef __SMALL_STACK
22#define THREAD_ORDER 2
23#define ASYNC_ORDER 2
24#else
25#define THREAD_ORDER 1
26#define ASYNC_ORDER 1
27#endif
28#endif /* __s390x__ */
29
30#define THREAD_SIZE (PAGE_SIZE << THREAD_ORDER)
31#define ASYNC_SIZE (PAGE_SIZE << ASYNC_ORDER)
32
33#ifndef __ASSEMBLY__
34#include <asm/lowcore.h>
35#include <asm/page.h>
36#include <asm/processor.h>
37
38/*
39 * low level task data that entry.S needs immediate access to
40 * - this struct should fit entirely inside of one cache line
41 * - this struct shares the supervisor stack pages
42 * - if the contents of this structure are changed, the assembly constants must also be changed
43 */
44struct thread_info {
45 struct task_struct *task; /* main task structure */
46 struct exec_domain *exec_domain; /* execution domain */
47 unsigned long flags; /* low level flags */
48 unsigned int cpu; /* current CPU */
49 int preempt_count; /* 0 => preemptable, <0 => BUG */
50 struct restart_block restart_block;
51 __u64 user_timer;
52 __u64 system_timer;
53 unsigned long last_break; /* last breaking-event-address. */
54};
55
56/*
57 * macros/functions for gaining access to the thread information structure
58 */
59#define INIT_THREAD_INFO(tsk) \
60{ \
61 .task = &tsk, \
62 .exec_domain = &default_exec_domain, \
63 .flags = 0, \
64 .cpu = 0, \
65 .preempt_count = INIT_PREEMPT_COUNT, \
66 .restart_block = { \
67 .fn = do_no_restart_syscall, \
68 }, \
69}
70
71#define init_thread_info (init_thread_union.thread_info)
72#define init_stack (init_thread_union.stack)
73
74/* how to get the thread information struct from C */
75static inline struct thread_info *current_thread_info(void)
76{
77 return (struct thread_info *) S390_lowcore.thread_info;
78}
79
80#define THREAD_SIZE_ORDER THREAD_ORDER
81
82#endif
83
84/*
85 * thread information flags bit numbers
86 */
87#define TIF_NOTIFY_RESUME 1 /* callback before returning to user */
88#define TIF_SIGPENDING 2 /* signal pending */
89#define TIF_NEED_RESCHED 3 /* rescheduling necessary */
90#define TIF_RESTART_SVC 4 /* restart svc with new svc number */
91#define TIF_PER_TRAP 6 /* deliver sigtrap on return to user */
92#define TIF_MCCK_PENDING 7 /* machine check handling is pending */
93#define TIF_SYSCALL_TRACE 8 /* syscall trace active */
94#define TIF_SYSCALL_AUDIT 9 /* syscall auditing active */
95#define TIF_SECCOMP 10 /* secure computing */
96#define TIF_SYSCALL_TRACEPOINT 11 /* syscall tracepoint instrumentation */
97#define TIF_SIE 12 /* guest execution active */
98#define TIF_POLLING_NRFLAG 16 /* true if poll_idle() is polling
99 TIF_NEED_RESCHED */
100#define TIF_31BIT 17 /* 32bit process */
101#define TIF_MEMDIE 18 /* is terminating due to OOM killer */
102#define TIF_RESTORE_SIGMASK 19 /* restore signal mask in do_signal() */
103#define TIF_SINGLE_STEP 20 /* This task is single stepped */
104#define TIF_FREEZE 21 /* thread is freezing for suspend */
105
106#define _TIF_NOTIFY_RESUME (1<<TIF_NOTIFY_RESUME)
107#define _TIF_RESTORE_SIGMASK (1<<TIF_RESTORE_SIGMASK)
108#define _TIF_SIGPENDING (1<<TIF_SIGPENDING)
109#define _TIF_NEED_RESCHED (1<<TIF_NEED_RESCHED)
110#define _TIF_RESTART_SVC (1<<TIF_RESTART_SVC)
111#define _TIF_PER_TRAP (1<<TIF_PER_TRAP)
112#define _TIF_MCCK_PENDING (1<<TIF_MCCK_PENDING)
113#define _TIF_SYSCALL_TRACE (1<<TIF_SYSCALL_TRACE)
114#define _TIF_SYSCALL_AUDIT (1<<TIF_SYSCALL_AUDIT)
115#define _TIF_SECCOMP (1<<TIF_SECCOMP)
116#define _TIF_SYSCALL_TRACEPOINT (1<<TIF_SYSCALL_TRACEPOINT)
117#define _TIF_SIE (1<<TIF_SIE)
118#define _TIF_POLLING_NRFLAG (1<<TIF_POLLING_NRFLAG)
119#define _TIF_31BIT (1<<TIF_31BIT)
120#define _TIF_SINGLE_STEP (1<<TIF_FREEZE)
121#define _TIF_FREEZE (1<<TIF_FREEZE)
122
123#ifdef CONFIG_64BIT
124#define is_32bit_task() (test_thread_flag(TIF_31BIT))
125#else
126#define is_32bit_task() (1)
127#endif
128
129#endif /* __KERNEL__ */
130
131#define PREEMPT_ACTIVE 0x4000000
132
133#endif /* _ASM_THREAD_INFO_H */