ARM: renumber bits related to _TIF_WORK_MASK
[platform/kernel/linux-starfive.git] / arch / arm / include / asm / thread_info.h
1 /* SPDX-License-Identifier: GPL-2.0-only */
2 /*
3  *  arch/arm/include/asm/thread_info.h
4  *
5  *  Copyright (C) 2002 Russell King.
6  */
7 #ifndef __ASM_ARM_THREAD_INFO_H
8 #define __ASM_ARM_THREAD_INFO_H
9
10 #ifdef __KERNEL__
11
12 #include <linux/compiler.h>
13 #include <asm/fpstate.h>
14 #include <asm/page.h>
15
16 #ifdef CONFIG_KASAN
17 /*
18  * KASan uses a lot of extra stack space so the thread size order needs to
19  * be increased.
20  */
21 #define THREAD_SIZE_ORDER       2
22 #else
23 #define THREAD_SIZE_ORDER       1
24 #endif
25 #define THREAD_SIZE             (PAGE_SIZE << THREAD_SIZE_ORDER)
26 #define THREAD_START_SP         (THREAD_SIZE - 8)
27
28 #ifdef CONFIG_VMAP_STACK
29 #define THREAD_ALIGN            (2 * THREAD_SIZE)
30 #else
31 #define THREAD_ALIGN            THREAD_SIZE
32 #endif
33
34 #define OVERFLOW_STACK_SIZE     SZ_4K
35
36 #ifndef __ASSEMBLY__
37
38 struct task_struct;
39
40 DECLARE_PER_CPU(struct task_struct *, __entry_task);
41
42 #include <asm/types.h>
43
44 struct cpu_context_save {
45         __u32   r4;
46         __u32   r5;
47         __u32   r6;
48         __u32   r7;
49         __u32   r8;
50         __u32   r9;
51         __u32   sl;
52         __u32   fp;
53         __u32   sp;
54         __u32   pc;
55         __u32   extra[2];               /* Xscale 'acc' register, etc */
56 };
57
58 /*
59  * low level task data that entry.S needs immediate access to.
60  * __switch_to() assumes cpu_context follows immediately after cpu_domain.
61  */
62 struct thread_info {
63         unsigned long           flags;          /* low level flags */
64         int                     preempt_count;  /* 0 => preemptable, <0 => bug */
65         __u32                   cpu;            /* cpu */
66         __u32                   cpu_domain;     /* cpu domain */
67         struct cpu_context_save cpu_context;    /* cpu context */
68         __u32                   abi_syscall;    /* ABI type and syscall nr */
69         __u8                    used_cp[16];    /* thread used copro */
70         unsigned long           tp_value[2];    /* TLS registers */
71         union fp_state          fpstate __attribute__((aligned(8)));
72         union vfp_state         vfpstate;
73 #ifdef CONFIG_ARM_THUMBEE
74         unsigned long           thumbee_state;  /* ThumbEE Handler Base register */
75 #endif
76 };
77
78 #define INIT_THREAD_INFO(tsk)                                           \
79 {                                                                       \
80         .flags          = 0,                                            \
81         .preempt_count  = INIT_PREEMPT_COUNT,                           \
82 }
83
84 static inline struct task_struct *thread_task(struct thread_info* ti)
85 {
86         return (struct task_struct *)ti;
87 }
88
89 #define thread_saved_pc(tsk)    \
90         ((unsigned long)(task_thread_info(tsk)->cpu_context.pc))
91 #define thread_saved_sp(tsk)    \
92         ((unsigned long)(task_thread_info(tsk)->cpu_context.sp))
93
94 #ifndef CONFIG_THUMB2_KERNEL
95 #define thread_saved_fp(tsk)    \
96         ((unsigned long)(task_thread_info(tsk)->cpu_context.fp))
97 #else
98 #define thread_saved_fp(tsk)    \
99         ((unsigned long)(task_thread_info(tsk)->cpu_context.r7))
100 #endif
101
102 extern void iwmmxt_task_disable(struct thread_info *);
103 extern void iwmmxt_task_copy(struct thread_info *, void *);
104 extern void iwmmxt_task_restore(struct thread_info *, void *);
105 extern void iwmmxt_task_release(struct thread_info *);
106 extern void iwmmxt_task_switch(struct thread_info *);
107
108 extern void vfp_sync_hwstate(struct thread_info *);
109 extern void vfp_flush_hwstate(struct thread_info *);
110
111 struct user_vfp;
112 struct user_vfp_exc;
113
114 extern int vfp_preserve_user_clear_hwstate(struct user_vfp *,
115                                            struct user_vfp_exc *);
116 extern int vfp_restore_user_hwstate(struct user_vfp *,
117                                     struct user_vfp_exc *);
118 #endif
119
120 /*
121  * thread information flags:
122  *  TIF_USEDFPU         - FPU was used by this task this quantum (SMP)
123  *  TIF_POLLING_NRFLAG  - true if poll_idle() is polling TIF_NEED_RESCHED
124  *
125  * Any bit in the range of 0..15 will cause do_work_pending() to be invoked.
126  */
127 #define TIF_SIGPENDING          0       /* signal pending */
128 #define TIF_NEED_RESCHED        1       /* rescheduling necessary */
129 #define TIF_NOTIFY_RESUME       2       /* callback before returning to user */
130 #define TIF_UPROBE              3       /* breakpointed or singlestepping */
131 #define TIF_NOTIFY_SIGNAL       4       /* signal notifications exist */
132
133 #define TIF_USING_IWMMXT        17
134 #define TIF_MEMDIE              18      /* is terminating due to OOM killer */
135 #define TIF_RESTORE_SIGMASK     19
136 #define TIF_SYSCALL_TRACE       20      /* syscall trace active */
137 #define TIF_SYSCALL_AUDIT       21      /* syscall auditing active */
138 #define TIF_SYSCALL_TRACEPOINT  22      /* syscall tracepoint instrumentation */
139 #define TIF_SECCOMP             23      /* seccomp syscall filtering active */
140
141
142 #define _TIF_SIGPENDING         (1 << TIF_SIGPENDING)
143 #define _TIF_NEED_RESCHED       (1 << TIF_NEED_RESCHED)
144 #define _TIF_NOTIFY_RESUME      (1 << TIF_NOTIFY_RESUME)
145 #define _TIF_UPROBE             (1 << TIF_UPROBE)
146 #define _TIF_SYSCALL_TRACE      (1 << TIF_SYSCALL_TRACE)
147 #define _TIF_SYSCALL_AUDIT      (1 << TIF_SYSCALL_AUDIT)
148 #define _TIF_SYSCALL_TRACEPOINT (1 << TIF_SYSCALL_TRACEPOINT)
149 #define _TIF_SECCOMP            (1 << TIF_SECCOMP)
150 #define _TIF_NOTIFY_SIGNAL      (1 << TIF_NOTIFY_SIGNAL)
151 #define _TIF_USING_IWMMXT       (1 << TIF_USING_IWMMXT)
152
153 /* Checks for any syscall work in entry-common.S */
154 #define _TIF_SYSCALL_WORK (_TIF_SYSCALL_TRACE | _TIF_SYSCALL_AUDIT | \
155                            _TIF_SYSCALL_TRACEPOINT | _TIF_SECCOMP)
156
157 /*
158  * Change these and you break ASM code in entry-common.S
159  */
160 #define _TIF_WORK_MASK          (_TIF_NEED_RESCHED | _TIF_SIGPENDING | \
161                                  _TIF_NOTIFY_RESUME | _TIF_UPROBE | \
162                                  _TIF_NOTIFY_SIGNAL)
163
164 #endif /* __KERNEL__ */
165 #endif /* __ASM_ARM_THREAD_INFO_H */