1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* 3 * S390 version 4 * Copyright IBM Corp. 2002, 2006 5 * Author(s): Martin Schwidefsky (schwidefsky@de.ibm.com) 6 */ 7 8 #ifndef _ASM_THREAD_INFO_H 9 #define _ASM_THREAD_INFO_H 10 11 #include <linux/bits.h> 12 13 /* 14 * General size of kernel stacks 15 */ 16 #ifdef CONFIG_KASAN 17 #define THREAD_SIZE_ORDER 4 18 #else 19 #define THREAD_SIZE_ORDER 2 20 #endif 21 #define BOOT_STACK_ORDER 2 22 #define THREAD_SIZE (PAGE_SIZE << THREAD_SIZE_ORDER) 23 24 #ifndef __ASSEMBLY__ 25 #include <asm/lowcore.h> 26 #include <asm/page.h> 27 #include <asm/processor.h> 28 29 #define STACK_INIT_OFFSET \ 30 (THREAD_SIZE - STACK_FRAME_OVERHEAD - sizeof(struct pt_regs)) 31 32 /* 33 * low level task data that entry.S needs immediate access to 34 * - this struct should fit entirely inside of one cache line 35 * - this struct shares the supervisor stack pages 36 * - if the contents of this structure are changed, the assembly constants must also be changed 37 */ 38 struct thread_info { 39 unsigned long flags; /* low level flags */ 40 }; 41 42 /* 43 * macros/functions for gaining access to the thread information structure 44 */ 45 #define INIT_THREAD_INFO(tsk) \ 46 { \ 47 .flags = 0, \ 48 } 49 50 void arch_release_task_struct(struct task_struct *tsk); 51 int arch_dup_task_struct(struct task_struct *dst, struct task_struct *src); 52 53 void arch_setup_new_exec(void); 54 #define arch_setup_new_exec arch_setup_new_exec 55 56 #endif 57 58 /* 59 * thread information flags bit numbers 60 */ 61 /* _TIF_WORK bits */ 62 #define TIF_NOTIFY_RESUME 0 /* callback before returning to user */ 63 #define TIF_SIGPENDING 1 /* signal pending */ 64 #define TIF_NEED_RESCHED 2 /* rescheduling necessary */ 65 #define TIF_UPROBE 3 /* breakpointed or single-stepping */ 66 #define TIF_GUARDED_STORAGE 4 /* load guarded storage control block */ 67 #define TIF_PATCH_PENDING 5 /* pending live patching update */ 68 #define TIF_PGSTE 6 /* New mm's will use 4K page tables */ 69 #define TIF_ISOLATE_BP 8 /* Run process with isolated BP */ 70 #define TIF_ISOLATE_BP_GUEST 9 /* Run KVM guests with isolated BP */ 71 72 #define TIF_31BIT 16 /* 32bit process */ 73 #define TIF_MEMDIE 17 /* is terminating due to OOM killer */ 74 #define TIF_RESTORE_SIGMASK 18 /* restore signal mask in do_signal() */ 75 #define TIF_SINGLE_STEP 19 /* This task is single stepped */ 76 #define TIF_BLOCK_STEP 20 /* This task is block stepped */ 77 #define TIF_UPROBE_SINGLESTEP 21 /* This task is uprobe single stepped */ 78 79 /* _TIF_TRACE bits */ 80 #define TIF_SYSCALL_TRACE 24 /* syscall trace active */ 81 #define TIF_SYSCALL_AUDIT 25 /* syscall auditing active */ 82 #define TIF_SECCOMP 26 /* secure computing */ 83 #define TIF_SYSCALL_TRACEPOINT 27 /* syscall tracepoint instrumentation */ 84 85 #define _TIF_NOTIFY_RESUME BIT(TIF_NOTIFY_RESUME) 86 #define _TIF_SIGPENDING BIT(TIF_SIGPENDING) 87 #define _TIF_NEED_RESCHED BIT(TIF_NEED_RESCHED) 88 #define _TIF_UPROBE BIT(TIF_UPROBE) 89 #define _TIF_GUARDED_STORAGE BIT(TIF_GUARDED_STORAGE) 90 #define _TIF_PATCH_PENDING BIT(TIF_PATCH_PENDING) 91 #define _TIF_ISOLATE_BP BIT(TIF_ISOLATE_BP) 92 #define _TIF_ISOLATE_BP_GUEST BIT(TIF_ISOLATE_BP_GUEST) 93 94 #define _TIF_31BIT BIT(TIF_31BIT) 95 #define _TIF_SINGLE_STEP BIT(TIF_SINGLE_STEP) 96 97 #define _TIF_SYSCALL_TRACE BIT(TIF_SYSCALL_TRACE) 98 #define _TIF_SYSCALL_AUDIT BIT(TIF_SYSCALL_AUDIT) 99 #define _TIF_SECCOMP BIT(TIF_SECCOMP) 100 #define _TIF_SYSCALL_TRACEPOINT BIT(TIF_SYSCALL_TRACEPOINT) 101 102 #endif /* _ASM_THREAD_INFO_H */ 103