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
15struct task_struct;
16
17#include <asm/memory.h>
18#include <asm/stack_pointer.h>
19#include <asm/types.h>
20
21typedef unsigned long mm_segment_t;
22
23/*
24 * low level task data that entry.S needs immediate access to.
25 */
26struct thread_info {
27	unsigned long		flags;		/* low level flags */
28	mm_segment_t		addr_limit;	/* address limit */
29#ifdef CONFIG_ARM64_SW_TTBR0_PAN
30	u64			ttbr0;		/* saved TTBR0_EL1 */
31#endif
32	union {
33		u64		preempt_count;	/* 0 => preemptible, <0 => bug */
34		struct {
35#ifdef CONFIG_CPU_BIG_ENDIAN
36			u32	need_resched;
37			u32	count;
38#else
39			u32	count;
40			u32	need_resched;
41#endif
42		} preempt;
43	};
44#ifdef CONFIG_SHADOW_CALL_STACK
45	void			*scs_base;
46	void			*scs_sp;
47#endif
48};
49
50#define thread_saved_pc(tsk)	\
51	((unsigned long)(tsk->thread.cpu_context.pc))
52#define thread_saved_sp(tsk)	\
53	((unsigned long)(tsk->thread.cpu_context.sp))
54#define thread_saved_fp(tsk)	\
55	((unsigned long)(tsk->thread.cpu_context.fp))
56
57void arch_setup_new_exec(void);
58#define arch_setup_new_exec     arch_setup_new_exec
59
60void arch_release_task_struct(struct task_struct *tsk);
61
62#endif
63
64#define TIF_SIGPENDING		0	/* signal pending */
65#define TIF_NEED_RESCHED	1	/* rescheduling necessary */
66#define TIF_NOTIFY_RESUME	2	/* callback before returning to user */
67#define TIF_FOREIGN_FPSTATE	3	/* CPU's FP state is not current's */
68#define TIF_UPROBE		4	/* uprobe breakpoint or singlestep */
69#define TIF_FSCHECK		5	/* Check FS is USER_DS on return */
70#define TIF_MTE_ASYNC_FAULT	6	/* MTE Asynchronous Tag Check Fault */
71#define TIF_NOTIFY_SIGNAL	7	/* signal notifications exist */
72#define TIF_SYSCALL_TRACE	8	/* syscall trace active */
73#define TIF_SYSCALL_AUDIT	9	/* syscall auditing */
74#define TIF_SYSCALL_TRACEPOINT	10	/* syscall tracepoint for ftrace */
75#define TIF_SECCOMP		11	/* syscall secure computing */
76#define TIF_SYSCALL_EMU		12	/* syscall emulation active */
77#define TIF_MEMDIE		18	/* is terminating due to OOM killer */
78#define TIF_FREEZE		19
79#define TIF_RESTORE_SIGMASK	20
80#define TIF_SINGLESTEP		21
81#define TIF_32BIT		22	/* 32bit process */
82#define TIF_SVE			23	/* Scalable Vector Extension in use */
83#define TIF_SVE_VL_INHERIT	24	/* Inherit sve_vl_onexec across exec */
84#define TIF_SSBD		25	/* Wants SSB mitigation */
85#define TIF_TAGGED_ADDR		26	/* Allow tagged user addresses */
86
87#define _TIF_SIGPENDING		(1 << TIF_SIGPENDING)
88#define _TIF_NEED_RESCHED	(1 << TIF_NEED_RESCHED)
89#define _TIF_NOTIFY_RESUME	(1 << TIF_NOTIFY_RESUME)
90#define _TIF_FOREIGN_FPSTATE	(1 << TIF_FOREIGN_FPSTATE)
91#define _TIF_SYSCALL_TRACE	(1 << TIF_SYSCALL_TRACE)
92#define _TIF_SYSCALL_AUDIT	(1 << TIF_SYSCALL_AUDIT)
93#define _TIF_SYSCALL_TRACEPOINT	(1 << TIF_SYSCALL_TRACEPOINT)
94#define _TIF_SECCOMP		(1 << TIF_SECCOMP)
95#define _TIF_SYSCALL_EMU	(1 << TIF_SYSCALL_EMU)
96#define _TIF_UPROBE		(1 << TIF_UPROBE)
97#define _TIF_FSCHECK		(1 << TIF_FSCHECK)
98#define _TIF_SINGLESTEP		(1 << TIF_SINGLESTEP)
99#define _TIF_32BIT		(1 << TIF_32BIT)
100#define _TIF_SVE		(1 << TIF_SVE)
101#define _TIF_MTE_ASYNC_FAULT	(1 << TIF_MTE_ASYNC_FAULT)
102#define _TIF_NOTIFY_SIGNAL	(1 << TIF_NOTIFY_SIGNAL)
103
104#define _TIF_WORK_MASK		(_TIF_NEED_RESCHED | _TIF_SIGPENDING | \
105				 _TIF_NOTIFY_RESUME | _TIF_FOREIGN_FPSTATE | \
106				 _TIF_UPROBE | _TIF_FSCHECK | _TIF_MTE_ASYNC_FAULT | \
107				 _TIF_NOTIFY_SIGNAL)
108
109#define _TIF_SYSCALL_WORK	(_TIF_SYSCALL_TRACE | _TIF_SYSCALL_AUDIT | \
110				 _TIF_SYSCALL_TRACEPOINT | _TIF_SECCOMP | \
111				 _TIF_SYSCALL_EMU)
112
113#ifdef CONFIG_SHADOW_CALL_STACK
114#define INIT_SCS							\
115	.scs_base	= init_shadow_call_stack,			\
116	.scs_sp		= init_shadow_call_stack,
117#else
118#define INIT_SCS
119#endif
120
121#define INIT_THREAD_INFO(tsk)						\
122{									\
123	.flags		= _TIF_FOREIGN_FPSTATE,				\
124	.preempt_count	= INIT_PREEMPT_COUNT,				\
125	.addr_limit	= KERNEL_DS,					\
126	INIT_SCS							\
127}
128
129#endif /* __ASM_THREAD_INFO_H */
130