1 /* SPDX-License-Identifier: GPL-2.0-only */
2 /*
3 * Based on arch/arm/include/asm/thread_info.h
4 *
5 * Copyright (C) 2002 Russell King.
6 * Copyright (C) 2012 ARM Ltd.
7 */
8 #ifndef __ASM_THREAD_INFO_H
9 #define __ASM_THREAD_INFO_H
10
11 #include <linux/compiler.h>
12
13 #ifndef __ASSEMBLY__
14
15 struct task_struct;
16
17 #include <asm/memory.h>
18 #include <asm/stack_pointer.h>
19 #include <asm/types.h>
20
21 /*
22 * low level task data that entry.S needs immediate access to.
23 */
24 struct thread_info {
25 unsigned long flags; /* low level flags */
26 #ifdef CONFIG_ARM64_SW_TTBR0_PAN
27 u64 ttbr0; /* saved TTBR0_EL1 */
28 #endif
29 union {
30 u64 preempt_count; /* 0 => preemptible, <0 => bug */
31 struct {
32 #ifdef CONFIG_CPU_BIG_ENDIAN
33 u32 need_resched;
34 u32 count;
35 #else
36 u32 count;
37 u32 need_resched;
38 #endif
39 } preempt;
40 };
41 #ifdef CONFIG_SHADOW_CALL_STACK
42 void *scs_base;
43 void *scs_sp;
44 #endif
45 u32 cpu;
46 };
47
48 #define thread_saved_pc(tsk) \
49 ((unsigned long)(tsk->thread.cpu_context.pc))
50 #define thread_saved_sp(tsk) \
51 ((unsigned long)(tsk->thread.cpu_context.sp))
52 #define thread_saved_fp(tsk) \
53 ((unsigned long)(tsk->thread.cpu_context.fp))
54
55 void arch_setup_new_exec(void);
56 #define arch_setup_new_exec arch_setup_new_exec
57
58 #endif
59
60 #define TIF_SIGPENDING 0 /* signal pending */
61 #define TIF_NEED_RESCHED 1 /* rescheduling necessary */
62 #define TIF_NOTIFY_RESUME 2 /* callback before returning to user */
63 #define TIF_FOREIGN_FPSTATE 3 /* CPU's FP state is not current's */
64 #define TIF_UPROBE 4 /* uprobe breakpoint or singlestep */
65 #define TIF_MTE_ASYNC_FAULT 5 /* MTE Asynchronous Tag Check Fault */
66 #define TIF_NOTIFY_SIGNAL 6 /* signal notifications exist */
67 #define TIF_SYSCALL_TRACE 8 /* syscall trace active */
68 #define TIF_SYSCALL_AUDIT 9 /* syscall auditing */
69 #define TIF_SYSCALL_TRACEPOINT 10 /* syscall tracepoint for ftrace */
70 #define TIF_SECCOMP 11 /* syscall secure computing */
71 #define TIF_SYSCALL_EMU 12 /* syscall emulation active */
72 #define TIF_MEMDIE 18 /* is terminating due to OOM killer */
73 #define TIF_FREEZE 19
74 #define TIF_RESTORE_SIGMASK 20
75 #define TIF_SINGLESTEP 21
76 #define TIF_32BIT 22 /* 32bit process */
77 #define TIF_SVE 23 /* Scalable Vector Extension in use */
78 #define TIF_SVE_VL_INHERIT 24 /* Inherit SVE vl_onexec across exec */
79 #define TIF_SSBD 25 /* Wants SSB mitigation */
80 #define TIF_TAGGED_ADDR 26 /* Allow tagged user addresses */
81 #define TIF_SME 27 /* SME in use */
82 #define TIF_SME_VL_INHERIT 28 /* Inherit SME vl_onexec across exec */
83 #define TIF_KERNEL_FPSTATE 29 /* Task is in a kernel mode FPSIMD section */
84
85 #define _TIF_SIGPENDING (1 << TIF_SIGPENDING)
86 #define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED)
87 #define _TIF_NOTIFY_RESUME (1 << TIF_NOTIFY_RESUME)
88 #define _TIF_FOREIGN_FPSTATE (1 << TIF_FOREIGN_FPSTATE)
89 #define _TIF_SYSCALL_TRACE (1 << TIF_SYSCALL_TRACE)
90 #define _TIF_SYSCALL_AUDIT (1 << TIF_SYSCALL_AUDIT)
91 #define _TIF_SYSCALL_TRACEPOINT (1 << TIF_SYSCALL_TRACEPOINT)
92 #define _TIF_SECCOMP (1 << TIF_SECCOMP)
93 #define _TIF_SYSCALL_EMU (1 << TIF_SYSCALL_EMU)
94 #define _TIF_UPROBE (1 << TIF_UPROBE)
95 #define _TIF_SINGLESTEP (1 << TIF_SINGLESTEP)
96 #define _TIF_32BIT (1 << TIF_32BIT)
97 #define _TIF_SVE (1 << TIF_SVE)
98 #define _TIF_MTE_ASYNC_FAULT (1 << TIF_MTE_ASYNC_FAULT)
99 #define _TIF_NOTIFY_SIGNAL (1 << TIF_NOTIFY_SIGNAL)
100
101 #define _TIF_WORK_MASK (_TIF_NEED_RESCHED | _TIF_SIGPENDING | \
102 _TIF_NOTIFY_RESUME | _TIF_FOREIGN_FPSTATE | \
103 _TIF_UPROBE | _TIF_MTE_ASYNC_FAULT | \
104 _TIF_NOTIFY_SIGNAL)
105
106 #define _TIF_SYSCALL_WORK (_TIF_SYSCALL_TRACE | _TIF_SYSCALL_AUDIT | \
107 _TIF_SYSCALL_TRACEPOINT | _TIF_SECCOMP | \
108 _TIF_SYSCALL_EMU)
109
110 #ifdef CONFIG_SHADOW_CALL_STACK
111 #define INIT_SCS \
112 .scs_base = init_shadow_call_stack, \
113 .scs_sp = init_shadow_call_stack,
114 #else
115 #define INIT_SCS
116 #endif
117
118 #define INIT_THREAD_INFO(tsk) \
119 { \
120 .flags = _TIF_FOREIGN_FPSTATE, \
121 .preempt_count = INIT_PREEMPT_COUNT, \
122 INIT_SCS \
123 }
124
125 #endif /* __ASM_THREAD_INFO_H */
126
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