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