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/* 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 */