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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>
#include <vdso/page.h>
/*
* General size of kernel stacks
*/
#if defined(CONFIG_KASAN) || defined(CONFIG_KMSAN)
#define THREAD_SIZE_ORDER 4
#else
#define THREAD_SIZE_ORDER 2
#endif
#define BOOT_STACK_SIZE (PAGE_SIZE << 2)
#define THREAD_SIZE (PAGE_SIZE << THREAD_SIZE_ORDER)
#define STACK_INIT_OFFSET (THREAD_SIZE - STACK_FRAME_OVERHEAD - __PT_SIZE)
#ifndef __ASSEMBLER__
/*
* 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 */
unsigned long syscall_work; /* SYSCALL_WORK_ flags */
unsigned int cpu; /* current CPU */
unsigned char sie; /* running in SIE context */
};
/*
* macros/functions for gaining access to the thread information structure
*/
#define INIT_THREAD_INFO(tsk) \
{ \
.flags = 0, \
}
struct task_struct;
void arch_setup_new_exec(void);
#define arch_setup_new_exec arch_setup_new_exec
#endif
/*
* thread information flags bit numbers
*
* Tell the generic TIF infrastructure which special bits s390 supports
*/
#define HAVE_TIF_NEED_RESCHED_LAZY
#define HAVE_TIF_RESTORE_SIGMASK
#include <asm-generic/thread_info_tif.h>
/* Architecture specific bits */
#define TIF_ASCE_PRIMARY 16 /* primary asce is kernel asce */
#define TIF_GUARDED_STORAGE 17 /* load guarded storage control block */
#define TIF_ISOLATE_BP_GUEST 18 /* Run KVM guests with isolated BP */
#define TIF_PER_TRAP 19 /* Need to handle PER trap on exit to usermode */
#define TIF_SINGLE_STEP 21 /* This task is single stepped */
#define TIF_BLOCK_STEP 22 /* This task is block stepped */
#define TIF_UPROBE_SINGLESTEP 23 /* This task is uprobe single stepped */
#define _TIF_ASCE_PRIMARY BIT(TIF_ASCE_PRIMARY)
#define _TIF_GUARDED_STORAGE BIT(TIF_GUARDED_STORAGE)
#define _TIF_ISOLATE_BP_GUEST BIT(TIF_ISOLATE_BP_GUEST)
#define _TIF_PER_TRAP BIT(TIF_PER_TRAP)
#define _TIF_SINGLE_STEP BIT(TIF_SINGLE_STEP)
#define _TIF_BLOCK_STEP BIT(TIF_BLOCK_STEP)
#define _TIF_UPROBE_SINGLESTEP BIT(TIF_UPROBE_SINGLESTEP)
#endif /* _ASM_THREAD_INFO_H */
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