165 lines
4.7 KiB
C
165 lines
4.7 KiB
C
|
/* 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>
|
||
|
|
|
||
|
|
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 */
|
||
|
|
__u8 used_cp[16]; /* thread used copro */
|
||
|
|
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 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_SYSCALL_TRACE 4 /* syscall trace active */
|
||
|
|
#define TIF_SYSCALL_AUDIT 5 /* syscall auditing active */
|
||
|
|
#define TIF_SYSCALL_TRACEPOINT 6 /* syscall tracepoint instrumentation */
|
||
|
|
#define TIF_SECCOMP 7 /* seccomp syscall filtering active */
|
||
|
|
#define TIF_NOTIFY_SIGNAL 8 /* signal notifications exist */
|
||
|
|
|
||
|
|
#define TIF_USING_IWMMXT 17
|
||
|
|
#define TIF_MEMDIE 18 /* is terminating due to OOM killer */
|
||
|
|
#define TIF_RESTORE_SIGMASK 20
|
||
|
|
|
||
|
|
#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 */
|