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 #ifndef ASM_OFFSETS_C 13 #include <asm/asm-offsets.h> 14 #endif 15 16 /* 17 * General size of kernel stacks 18 */ 19 #if defined(CONFIG_KASAN) || defined(CONFIG_KMSAN) 20 #define THREAD_SIZE_ORDER 4 21 #else 22 #define THREAD_SIZE_ORDER 2 23 #endif 24 #define BOOT_STACK_SIZE (PAGE_SIZE << 2) 25 #define THREAD_SIZE (PAGE_SIZE << THREAD_SIZE_ORDER) 26 27 #define STACK_INIT_OFFSET (THREAD_SIZE - STACK_FRAME_OVERHEAD - __PT_SIZE) 28 29 #ifndef __ASSEMBLY__ 30 #include <asm/lowcore.h> 31 #include <asm/page.h> 32 33 /* 34 * low level task data that entry.S needs immediate access to 35 * - this struct should fit entirely inside of one cache line 36 * - this struct shares the supervisor stack pages 37 * - if the contents of this structure are changed, the assembly constants must also be changed 38 */ 39 struct thread_info { 40 unsigned long flags; /* low level flags */ 41 unsigned long syscall_work; /* SYSCALL_WORK_ flags */ 42 unsigned int cpu; /* current CPU */ 43 unsigned char sie; /* running in SIE context */ 44 }; 45 46 /* 47 * macros/functions for gaining access to the thread information structure 48 */ 49 #define INIT_THREAD_INFO(tsk) \ 50 { \ 51 .flags = 0, \ 52 } 53 54 struct task_struct; 55 56 void arch_setup_new_exec(void); 57 #define arch_setup_new_exec arch_setup_new_exec 58 59 #endif 60 61 /* 62 * thread information flags bit numbers 63 */ 64 /* _TIF_WORK bits */ 65 #define TIF_NOTIFY_RESUME 0 /* callback before returning to user */ 66 #define TIF_SIGPENDING 1 /* signal pending */ 67 #define TIF_NEED_RESCHED 2 /* rescheduling necessary */ 68 #define TIF_UPROBE 3 /* breakpointed or single-stepping */ 69 #define TIF_GUARDED_STORAGE 4 /* load guarded storage control block */ 70 #define TIF_PATCH_PENDING 5 /* pending live patching update */ 71 #define TIF_PGSTE 6 /* New mm's will use 4K page tables */ 72 #define TIF_NOTIFY_SIGNAL 7 /* signal notifications exist */ 73 #define TIF_ISOLATE_BP_GUEST 9 /* Run KVM guests with isolated BP */ 74 #define TIF_PER_TRAP 10 /* Need to handle PER trap on exit to usermode */ 75 76 #define TIF_31BIT 16 /* 32bit process */ 77 #define TIF_MEMDIE 17 /* is terminating due to OOM killer */ 78 #define TIF_RESTORE_SIGMASK 18 /* restore signal mask in do_signal() */ 79 #define TIF_SINGLE_STEP 19 /* This task is single stepped */ 80 #define TIF_BLOCK_STEP 20 /* This task is block stepped */ 81 #define TIF_UPROBE_SINGLESTEP 21 /* This task is uprobe single stepped */ 82 83 /* _TIF_TRACE bits */ 84 #define TIF_SYSCALL_TRACE 24 /* syscall trace active */ 85 #define TIF_SYSCALL_AUDIT 25 /* syscall auditing active */ 86 #define TIF_SECCOMP 26 /* secure computing */ 87 #define TIF_SYSCALL_TRACEPOINT 27 /* syscall tracepoint instrumentation */ 88 89 #define _TIF_NOTIFY_RESUME BIT(TIF_NOTIFY_RESUME) 90 #define _TIF_NOTIFY_SIGNAL BIT(TIF_NOTIFY_SIGNAL) 91 #define _TIF_SIGPENDING BIT(TIF_SIGPENDING) 92 #define _TIF_NEED_RESCHED BIT(TIF_NEED_RESCHED) 93 #define _TIF_UPROBE BIT(TIF_UPROBE) 94 #define _TIF_GUARDED_STORAGE BIT(TIF_GUARDED_STORAGE) 95 #define _TIF_PATCH_PENDING BIT(TIF_PATCH_PENDING) 96 #define _TIF_ISOLATE_BP_GUEST BIT(TIF_ISOLATE_BP_GUEST) 97 #define _TIF_PER_TRAP BIT(TIF_PER_TRAP) 98 99 #define _TIF_31BIT BIT(TIF_31BIT) 100 #define _TIF_SINGLE_STEP BIT(TIF_SINGLE_STEP) 101 102 #define _TIF_SYSCALL_TRACE BIT(TIF_SYSCALL_TRACE) 103 #define _TIF_SYSCALL_AUDIT BIT(TIF_SYSCALL_AUDIT) 104 #define _TIF_SECCOMP BIT(TIF_SECCOMP) 105 #define _TIF_SYSCALL_TRACEPOINT BIT(TIF_SYSCALL_TRACEPOINT) 106 107 #endif /* _ASM_THREAD_INFO_H */ 108