1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0 */ 2*4882a593Smuzhiyun /* 3*4882a593Smuzhiyun * S390 version 4*4882a593Smuzhiyun * Copyright IBM Corp. 2002, 2006 5*4882a593Smuzhiyun * Author(s): Martin Schwidefsky (schwidefsky@de.ibm.com) 6*4882a593Smuzhiyun */ 7*4882a593Smuzhiyun 8*4882a593Smuzhiyun #ifndef _ASM_THREAD_INFO_H 9*4882a593Smuzhiyun #define _ASM_THREAD_INFO_H 10*4882a593Smuzhiyun 11*4882a593Smuzhiyun #include <linux/bits.h> 12*4882a593Smuzhiyun 13*4882a593Smuzhiyun /* 14*4882a593Smuzhiyun * General size of kernel stacks 15*4882a593Smuzhiyun */ 16*4882a593Smuzhiyun #ifdef CONFIG_KASAN 17*4882a593Smuzhiyun #define THREAD_SIZE_ORDER 4 18*4882a593Smuzhiyun #else 19*4882a593Smuzhiyun #define THREAD_SIZE_ORDER 2 20*4882a593Smuzhiyun #endif 21*4882a593Smuzhiyun #define BOOT_STACK_ORDER 2 22*4882a593Smuzhiyun #define THREAD_SIZE (PAGE_SIZE << THREAD_SIZE_ORDER) 23*4882a593Smuzhiyun 24*4882a593Smuzhiyun #ifndef __ASSEMBLY__ 25*4882a593Smuzhiyun #include <asm/lowcore.h> 26*4882a593Smuzhiyun #include <asm/page.h> 27*4882a593Smuzhiyun 28*4882a593Smuzhiyun #define STACK_INIT_OFFSET \ 29*4882a593Smuzhiyun (THREAD_SIZE - STACK_FRAME_OVERHEAD - sizeof(struct pt_regs)) 30*4882a593Smuzhiyun 31*4882a593Smuzhiyun /* 32*4882a593Smuzhiyun * low level task data that entry.S needs immediate access to 33*4882a593Smuzhiyun * - this struct should fit entirely inside of one cache line 34*4882a593Smuzhiyun * - this struct shares the supervisor stack pages 35*4882a593Smuzhiyun * - if the contents of this structure are changed, the assembly constants must also be changed 36*4882a593Smuzhiyun */ 37*4882a593Smuzhiyun struct thread_info { 38*4882a593Smuzhiyun unsigned long flags; /* low level flags */ 39*4882a593Smuzhiyun }; 40*4882a593Smuzhiyun 41*4882a593Smuzhiyun /* 42*4882a593Smuzhiyun * macros/functions for gaining access to the thread information structure 43*4882a593Smuzhiyun */ 44*4882a593Smuzhiyun #define INIT_THREAD_INFO(tsk) \ 45*4882a593Smuzhiyun { \ 46*4882a593Smuzhiyun .flags = 0, \ 47*4882a593Smuzhiyun } 48*4882a593Smuzhiyun 49*4882a593Smuzhiyun void arch_release_task_struct(struct task_struct *tsk); 50*4882a593Smuzhiyun int arch_dup_task_struct(struct task_struct *dst, struct task_struct *src); 51*4882a593Smuzhiyun 52*4882a593Smuzhiyun void arch_setup_new_exec(void); 53*4882a593Smuzhiyun #define arch_setup_new_exec arch_setup_new_exec 54*4882a593Smuzhiyun 55*4882a593Smuzhiyun #endif 56*4882a593Smuzhiyun 57*4882a593Smuzhiyun /* 58*4882a593Smuzhiyun * thread information flags bit numbers 59*4882a593Smuzhiyun */ 60*4882a593Smuzhiyun /* _TIF_WORK bits */ 61*4882a593Smuzhiyun #define TIF_NOTIFY_RESUME 0 /* callback before returning to user */ 62*4882a593Smuzhiyun #define TIF_SIGPENDING 1 /* signal pending */ 63*4882a593Smuzhiyun #define TIF_NEED_RESCHED 2 /* rescheduling necessary */ 64*4882a593Smuzhiyun #define TIF_UPROBE 3 /* breakpointed or single-stepping */ 65*4882a593Smuzhiyun #define TIF_GUARDED_STORAGE 4 /* load guarded storage control block */ 66*4882a593Smuzhiyun #define TIF_PATCH_PENDING 5 /* pending live patching update */ 67*4882a593Smuzhiyun #define TIF_PGSTE 6 /* New mm's will use 4K page tables */ 68*4882a593Smuzhiyun #define TIF_NOTIFY_SIGNAL 7 /* signal notifications exist */ 69*4882a593Smuzhiyun #define TIF_ISOLATE_BP 8 /* Run process with isolated BP */ 70*4882a593Smuzhiyun #define TIF_ISOLATE_BP_GUEST 9 /* Run KVM guests with isolated BP */ 71*4882a593Smuzhiyun 72*4882a593Smuzhiyun #define TIF_31BIT 16 /* 32bit process */ 73*4882a593Smuzhiyun #define TIF_MEMDIE 17 /* is terminating due to OOM killer */ 74*4882a593Smuzhiyun #define TIF_RESTORE_SIGMASK 18 /* restore signal mask in do_signal() */ 75*4882a593Smuzhiyun #define TIF_SINGLE_STEP 19 /* This task is single stepped */ 76*4882a593Smuzhiyun #define TIF_BLOCK_STEP 20 /* This task is block stepped */ 77*4882a593Smuzhiyun #define TIF_UPROBE_SINGLESTEP 21 /* This task is uprobe single stepped */ 78*4882a593Smuzhiyun 79*4882a593Smuzhiyun /* _TIF_TRACE bits */ 80*4882a593Smuzhiyun #define TIF_SYSCALL_TRACE 24 /* syscall trace active */ 81*4882a593Smuzhiyun #define TIF_SYSCALL_AUDIT 25 /* syscall auditing active */ 82*4882a593Smuzhiyun #define TIF_SECCOMP 26 /* secure computing */ 83*4882a593Smuzhiyun #define TIF_SYSCALL_TRACEPOINT 27 /* syscall tracepoint instrumentation */ 84*4882a593Smuzhiyun 85*4882a593Smuzhiyun #define _TIF_NOTIFY_RESUME BIT(TIF_NOTIFY_RESUME) 86*4882a593Smuzhiyun #define _TIF_NOTIFY_SIGNAL BIT(TIF_NOTIFY_SIGNAL) 87*4882a593Smuzhiyun #define _TIF_SIGPENDING BIT(TIF_SIGPENDING) 88*4882a593Smuzhiyun #define _TIF_NEED_RESCHED BIT(TIF_NEED_RESCHED) 89*4882a593Smuzhiyun #define _TIF_UPROBE BIT(TIF_UPROBE) 90*4882a593Smuzhiyun #define _TIF_GUARDED_STORAGE BIT(TIF_GUARDED_STORAGE) 91*4882a593Smuzhiyun #define _TIF_PATCH_PENDING BIT(TIF_PATCH_PENDING) 92*4882a593Smuzhiyun #define _TIF_ISOLATE_BP BIT(TIF_ISOLATE_BP) 93*4882a593Smuzhiyun #define _TIF_ISOLATE_BP_GUEST BIT(TIF_ISOLATE_BP_GUEST) 94*4882a593Smuzhiyun 95*4882a593Smuzhiyun #define _TIF_31BIT BIT(TIF_31BIT) 96*4882a593Smuzhiyun #define _TIF_SINGLE_STEP BIT(TIF_SINGLE_STEP) 97*4882a593Smuzhiyun 98*4882a593Smuzhiyun #define _TIF_SYSCALL_TRACE BIT(TIF_SYSCALL_TRACE) 99*4882a593Smuzhiyun #define _TIF_SYSCALL_AUDIT BIT(TIF_SYSCALL_AUDIT) 100*4882a593Smuzhiyun #define _TIF_SECCOMP BIT(TIF_SECCOMP) 101*4882a593Smuzhiyun #define _TIF_SYSCALL_TRACEPOINT BIT(TIF_SYSCALL_TRACEPOINT) 102*4882a593Smuzhiyun 103*4882a593Smuzhiyun #endif /* _ASM_THREAD_INFO_H */ 104