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/* SPDX-License-Identifier: GPL-2.0 */
/*
* S390 version
* Copyright IBM Corp. 2002, 2006
* Author(s): Martin Schwidefsky (schwidefsky@de.ibm.com)
*/
#ifndef _ASM_THREAD_INFO_H
#define _ASM_THREAD_INFO_H
#include <linux/bits.h>
/*
* General size of kernel stacks
*/
#ifdef CONFIG_KASAN
#define THREAD_SIZE_ORDER 4
#else
#define THREAD_SIZE_ORDER 2
#endif
#define BOOT_STACK_ORDER 2
#define THREAD_SIZE (PAGE_SIZE << THREAD_SIZE_ORDER)
#ifndef __ASSEMBLY__
#include <asm/lowcore.h>
#include <asm/page.h>
#define STACK_INIT_OFFSET \
(THREAD_SIZE - STACK_FRAME_OVERHEAD - sizeof(struct pt_regs))
/*
* low level task data that entry.S needs immediate access to
* - this struct should fit entirely inside of one cache line
* - this struct shares the supervisor stack pages
* - if the contents of this structure are changed, the assembly constants must also be changed
*/
struct thread_info {
unsigned long flags; /* low level flags */
};
/*
* macros/functions for gaining access to the thread information structure
*/
#define INIT_THREAD_INFO(tsk) \
{ \
.flags = 0, \
}
void arch_release_task_struct(struct task_struct *tsk);
int arch_dup_task_struct(struct task_struct *dst, struct task_struct *src);
void arch_setup_new_exec(void);
#define arch_setup_new_exec arch_setup_new_exec
#endif
/*
* thread information flags bit numbers
*/
/* _TIF_WORK bits */
#define TIF_NOTIFY_RESUME 0 /* callback before returning to user */
#define TIF_SIGPENDING 1 /* signal pending */
#define TIF_NEED_RESCHED 2 /* rescheduling necessary */
#define TIF_UPROBE 3 /* breakpointed or single-stepping */
#define TIF_GUARDED_STORAGE 4 /* load guarded storage control block */
#define TIF_PATCH_PENDING 5 /* pending live patching update */
#define TIF_PGSTE 6 /* New mm's will use 4K page tables */
#define TIF_ISOLATE_BP 8 /* Run process with isolated BP */
#define TIF_ISOLATE_BP_GUEST 9 /* Run KVM guests with isolated BP */
#define TIF_31BIT 16 /* 32bit process */
#define TIF_MEMDIE 17 /* is terminating due to OOM killer */
#define TIF_RESTORE_SIGMASK 18 /* restore signal mask in do_signal() */
#define TIF_SINGLE_STEP 19 /* This task is single stepped */
#define TIF_BLOCK_STEP 20 /* This task is block stepped */
#define TIF_UPROBE_SINGLESTEP 21 /* This task is uprobe single stepped */
/* _TIF_TRACE bits */
#define TIF_SYSCALL_TRACE 24 /* syscall trace active */
#define TIF_SYSCALL_AUDIT 25 /* syscall auditing active */
#define TIF_SECCOMP 26 /* secure computing */
#define TIF_SYSCALL_TRACEPOINT 27 /* syscall tracepoint instrumentation */
#define _TIF_NOTIFY_RESUME BIT(TIF_NOTIFY_RESUME)
#define _TIF_SIGPENDING BIT(TIF_SIGPENDING)
#define _TIF_NEED_RESCHED BIT(TIF_NEED_RESCHED)
#define _TIF_UPROBE BIT(TIF_UPROBE)
#define _TIF_GUARDED_STORAGE BIT(TIF_GUARDED_STORAGE)
#define _TIF_PATCH_PENDING BIT(TIF_PATCH_PENDING)
#define _TIF_ISOLATE_BP BIT(TIF_ISOLATE_BP)
#define _TIF_ISOLATE_BP_GUEST BIT(TIF_ISOLATE_BP_GUEST)
#define _TIF_31BIT BIT(TIF_31BIT)
#define _TIF_SINGLE_STEP BIT(TIF_SINGLE_STEP)
#define _TIF_SYSCALL_TRACE BIT(TIF_SYSCALL_TRACE)
#define _TIF_SYSCALL_AUDIT BIT(TIF_SYSCALL_AUDIT)
#define _TIF_SECCOMP BIT(TIF_SECCOMP)
#define _TIF_SYSCALL_TRACEPOINT BIT(TIF_SYSCALL_TRACEPOINT)
#endif /* _ASM_THREAD_INFO_H */
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