/* SPDX-License-Identifier: GPL-2.0-only *//* *  arch/arm/include/asm/thread_info.h * *  Copyright (C) 2002 Russell King. */#ifndef __ASM_ARM_THREAD_INFO_H#define __ASM_ARM_THREAD_INFO_H #ifdef __KERNEL__ #include <linux/compiler.h>#include <asm/fpstate.h>#include <asm/page.h> #ifdef CONFIG_KASAN/* * KASan uses a lot of extra stack space so the thread size order needs to * be increased. */#define THREAD_SIZE_ORDER	2#else#define THREAD_SIZE_ORDER	1#endif#define THREAD_SIZE		(PAGE_SIZE << THREAD_SIZE_ORDER)#define THREAD_START_SP		(THREAD_SIZE - 8) #ifdef CONFIG_VMAP_STACK#define THREAD_ALIGN		(2 * THREAD_SIZE)#else#define THREAD_ALIGN		THREAD_SIZE#endif #define OVERFLOW_STACK_SIZE	SZ_4K #ifndef __ASSEMBLY__ struct task_struct; DECLARE_PER_CPU(struct task_struct *, __entry_task); #include <asm/types.h>#include <asm/traps.h> struct cpu_context_save {	__u32	r4;	__u32	r5;	__u32	r6;	__u32	r7;	__u32	r8;	__u32	r9;	__u32	sl;	__u32	fp;	__u32	sp;	__u32	pc;	__u32	extra[2];		/* Xscale 'acc' register, etc */}; /* * low level task data that entry.S needs immediate access to. * __switch_to() assumes cpu_context follows immediately after cpu_domain. */struct thread_info {	unsigned long		flags;		/* low level flags */	int			preempt_count;	/* 0 => preemptable, <0 => bug */	__u32			cpu;		/* cpu */	__u32			cpu_domain;	/* cpu domain */	struct cpu_context_save	cpu_context;	/* cpu context */	__u32			abi_syscall;	/* ABI type and syscall nr */	unsigned long		tp_value[2];	/* TLS registers */	union fp_state		fpstate __attribute__((aligned(8)));	union vfp_state		vfpstate;#ifdef CONFIG_ARM_THUMBEE	unsigned long		thumbee_state;	/* ThumbEE Handler Base register */#endif}; #define INIT_THREAD_INFO(tsk)						\{									\	.flags		= 0,						\	.preempt_count	= INIT_PREEMPT_COUNT,				\} static inline struct task_struct *thread_task(struct thread_info* ti){	return (struct task_struct *)ti;} #define thread_saved_pc(tsk)	\	((unsigned long)(task_thread_info(tsk)->cpu_context.pc))#define thread_saved_sp(tsk)	\	((unsigned long)(task_thread_info(tsk)->cpu_context.sp)) #ifndef CONFIG_THUMB2_KERNEL#define thread_saved_fp(tsk)	\	((unsigned long)(task_thread_info(tsk)->cpu_context.fp))#else#define thread_saved_fp(tsk)	\	((unsigned long)(task_thread_info(tsk)->cpu_context.r7))#endif extern void iwmmxt_task_disable(struct thread_info *);extern void iwmmxt_task_copy(struct thread_info *, void *);extern void iwmmxt_task_restore(struct thread_info *, void *);extern void iwmmxt_task_release(struct thread_info *);extern void iwmmxt_task_switch(struct thread_info *); extern int iwmmxt_undef_handler(struct pt_regs *, u32); static inline void register_iwmmxt_undef_handler(void){	static struct undef_hook iwmmxt_undef_hook = {		.instr_mask	= 0x0c000e00,		.instr_val	= 0x0c000000,		.cpsr_mask	= MODE_MASK | PSR_T_BIT,		.cpsr_val	= USR_MODE,		.fn		= iwmmxt_undef_handler,	}; 	register_undef_hook(&iwmmxt_undef_hook);} extern void vfp_sync_hwstate(struct thread_info *);extern void vfp_flush_hwstate(struct thread_info *); struct user_vfp;struct user_vfp_exc; extern int vfp_preserve_user_clear_hwstate(struct user_vfp *,					   struct user_vfp_exc *);extern int vfp_restore_user_hwstate(struct user_vfp *,				    struct user_vfp_exc *);#endif /* * thread information flags: *  TIF_USEDFPU		- FPU was used by this task this quantum (SMP) *  TIF_POLLING_NRFLAG	- true if poll_idle() is polling TIF_NEED_RESCHED * * Any bit in the range of 0..15 will cause do_work_pending() to be invoked. */#define TIF_SIGPENDING		0	/* signal pending */#define TIF_NEED_RESCHED	1	/* rescheduling necessary */#define TIF_NOTIFY_RESUME	2	/* callback before returning to user */#define TIF_UPROBE		3	/* breakpointed or singlestepping */#define TIF_NOTIFY_SIGNAL	4	/* signal notifications exist */ #define TIF_USING_IWMMXT	17#define TIF_MEMDIE		18	/* is terminating due to OOM killer */#define TIF_RESTORE_SIGMASK	19#define TIF_SYSCALL_TRACE	20	/* syscall trace active */#define TIF_SYSCALL_AUDIT	21	/* syscall auditing active */#define TIF_SYSCALL_TRACEPOINT	22	/* syscall tracepoint instrumentation */#define TIF_SECCOMP		23	/* seccomp syscall filtering active */  #define _TIF_SIGPENDING		(1 << TIF_SIGPENDING)#define _TIF_NEED_RESCHED	(1 << TIF_NEED_RESCHED)#define _TIF_NOTIFY_RESUME	(1 << TIF_NOTIFY_RESUME)#define _TIF_UPROBE		(1 << TIF_UPROBE)#define _TIF_SYSCALL_TRACE	(1 << TIF_SYSCALL_TRACE)#define _TIF_SYSCALL_AUDIT	(1 << TIF_SYSCALL_AUDIT)#define _TIF_SYSCALL_TRACEPOINT	(1 << TIF_SYSCALL_TRACEPOINT)#define _TIF_SECCOMP		(1 << TIF_SECCOMP)#define _TIF_NOTIFY_SIGNAL	(1 << TIF_NOTIFY_SIGNAL)#define _TIF_USING_IWMMXT	(1 << TIF_USING_IWMMXT) /* Checks for any syscall work in entry-common.S */#define _TIF_SYSCALL_WORK (_TIF_SYSCALL_TRACE | _TIF_SYSCALL_AUDIT | \			   _TIF_SYSCALL_TRACEPOINT | _TIF_SECCOMP) /* * Change these and you break ASM code in entry-common.S */#define _TIF_WORK_MASK		(_TIF_NEED_RESCHED | _TIF_SIGPENDING | \				 _TIF_NOTIFY_RESUME | _TIF_UPROBE | \				 _TIF_NOTIFY_SIGNAL) #endif /* __KERNEL__ */#endif /* __ASM_ARM_THREAD_INFO_H */