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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 __ASSEMBLER__
14
15struct 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 */
24struct 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
55void 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_NEED_RESCHED_LAZY 2 /* Lazy rescheduling needed */
63#define TIF_NOTIFY_RESUME 3 /* callback before returning to user */
64#define TIF_FOREIGN_FPSTATE 4 /* CPU's FP state is not current's */
65#define TIF_UPROBE 5 /* uprobe breakpoint or singlestep */
66#define TIF_MTE_ASYNC_FAULT 6 /* MTE Asynchronous Tag Check Fault */
67#define TIF_NOTIFY_SIGNAL 7 /* signal notifications exist */
68#define TIF_SYSCALL_TRACE 8 /* syscall trace active */
69#define TIF_SYSCALL_AUDIT 9 /* syscall auditing */
70#define TIF_SYSCALL_TRACEPOINT 10 /* syscall tracepoint for ftrace */
71#define TIF_SECCOMP 11 /* syscall secure computing */
72#define TIF_SYSCALL_EMU 12 /* syscall emulation active */
73#define TIF_PATCH_PENDING 13 /* pending live patching update */
74#define TIF_MEMDIE 18 /* is terminating due to OOM killer */
75#define TIF_FREEZE 19
76#define TIF_RESTORE_SIGMASK 20
77#define TIF_SINGLESTEP 21
78#define TIF_32BIT 22 /* 32bit process */
79#define TIF_SVE 23 /* Scalable Vector Extension in use */
80#define TIF_SVE_VL_INHERIT 24 /* Inherit SVE vl_onexec across exec */
81#define TIF_SSBD 25 /* Wants SSB mitigation */
82#define TIF_TAGGED_ADDR 26 /* Allow tagged user addresses */
83#define TIF_SME 27 /* SME in use */
84#define TIF_SME_VL_INHERIT 28 /* Inherit SME vl_onexec across exec */
85#define TIF_KERNEL_FPSTATE 29 /* Task is in a kernel mode FPSIMD section */
86#define TIF_TSC_SIGSEGV 30 /* SIGSEGV on counter-timer access */
87#define TIF_LAZY_MMU 31 /* Task in lazy mmu mode */
88#define TIF_LAZY_MMU_PENDING 32 /* Ops pending for lazy mmu mode exit */
89
90#define _TIF_SIGPENDING (1 << TIF_SIGPENDING)
91#define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED)
92#define _TIF_NEED_RESCHED_LAZY (1 << TIF_NEED_RESCHED_LAZY)
93#define _TIF_NOTIFY_RESUME (1 << TIF_NOTIFY_RESUME)
94#define _TIF_FOREIGN_FPSTATE (1 << TIF_FOREIGN_FPSTATE)
95#define _TIF_SYSCALL_TRACE (1 << TIF_SYSCALL_TRACE)
96#define _TIF_SYSCALL_AUDIT (1 << TIF_SYSCALL_AUDIT)
97#define _TIF_SYSCALL_TRACEPOINT (1 << TIF_SYSCALL_TRACEPOINT)
98#define _TIF_SECCOMP (1 << TIF_SECCOMP)
99#define _TIF_SYSCALL_EMU (1 << TIF_SYSCALL_EMU)
100#define _TIF_PATCH_PENDING (1 << TIF_PATCH_PENDING)
101#define _TIF_UPROBE (1 << TIF_UPROBE)
102#define _TIF_SINGLESTEP (1 << TIF_SINGLESTEP)
103#define _TIF_32BIT (1 << TIF_32BIT)
104#define _TIF_SVE (1 << TIF_SVE)
105#define _TIF_MTE_ASYNC_FAULT (1 << TIF_MTE_ASYNC_FAULT)
106#define _TIF_NOTIFY_SIGNAL (1 << TIF_NOTIFY_SIGNAL)
107#define _TIF_TSC_SIGSEGV (1 << TIF_TSC_SIGSEGV)
108
109#define _TIF_WORK_MASK (_TIF_NEED_RESCHED | _TIF_NEED_RESCHED_LAZY | \
110 _TIF_NOTIFY_RESUME | _TIF_FOREIGN_FPSTATE | \
111 _TIF_UPROBE | _TIF_MTE_ASYNC_FAULT | \
112 _TIF_NOTIFY_SIGNAL | _TIF_SIGPENDING | \
113 _TIF_PATCH_PENDING)
114
115#define _TIF_SYSCALL_WORK (_TIF_SYSCALL_TRACE | _TIF_SYSCALL_AUDIT | \
116 _TIF_SYSCALL_TRACEPOINT | _TIF_SECCOMP | \
117 _TIF_SYSCALL_EMU)
118
119#ifdef CONFIG_SHADOW_CALL_STACK
120#define INIT_SCS \
121 .scs_base = init_shadow_call_stack, \
122 .scs_sp = init_shadow_call_stack,
123#else
124#define INIT_SCS
125#endif
126
127#define INIT_THREAD_INFO(tsk) \
128{ \
129 .flags = _TIF_FOREIGN_FPSTATE, \
130 .preempt_count = INIT_PREEMPT_COUNT, \
131 INIT_SCS \
132}
133
134#endif /* __ASM_THREAD_INFO_H */