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