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 #include <vdso/page.h> 13 14 /* 15 * General size of kernel stacks 16 */ 17 #if defined(CONFIG_KASAN) || defined(CONFIG_KMSAN) 18 #define THREAD_SIZE_ORDER 4 19 #else 20 #define THREAD_SIZE_ORDER 2 21 #endif 22 #define BOOT_STACK_SIZE (PAGE_SIZE << 2) 23 #define THREAD_SIZE (PAGE_SIZE << THREAD_SIZE_ORDER) 24 25 #define STACK_INIT_OFFSET (THREAD_SIZE - STACK_FRAME_OVERHEAD - __PT_SIZE) 26 27 #ifndef __ASSEMBLER__ 28 29 /* 30 * low level task data that entry.S needs immediate access to 31 * - this struct should fit entirely inside of one cache line 32 * - this struct shares the supervisor stack pages 33 * - if the contents of this structure are changed, the assembly constants must also be changed 34 */ 35 struct thread_info { 36 unsigned long flags; /* low level flags */ 37 unsigned long syscall_work; /* SYSCALL_WORK_ flags */ 38 unsigned int cpu; /* current CPU */ 39 unsigned char sie; /* running in SIE context */ 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 struct task_struct; 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 * Tell the generic TIF infrastructure which special bits s390 supports 61 */ 62 #define HAVE_TIF_NEED_RESCHED_LAZY 63 #define HAVE_TIF_RESTORE_SIGMASK 64 65 #include <asm-generic/thread_info_tif.h> 66 67 /* Architecture specific bits */ 68 #define TIF_ASCE_PRIMARY 16 /* primary asce is kernel asce */ 69 #define TIF_GUARDED_STORAGE 17 /* load guarded storage control block */ 70 #define TIF_ISOLATE_BP_GUEST 18 /* Run KVM guests with isolated BP */ 71 #define TIF_PER_TRAP 19 /* Need to handle PER trap on exit to usermode */ 72 #define TIF_31BIT 20 /* 32bit process */ 73 #define TIF_SINGLE_STEP 21 /* This task is single stepped */ 74 #define TIF_BLOCK_STEP 22 /* This task is block stepped */ 75 #define TIF_UPROBE_SINGLESTEP 23 /* This task is uprobe single stepped */ 76 77 #define _TIF_ASCE_PRIMARY BIT(TIF_ASCE_PRIMARY) 78 #define _TIF_GUARDED_STORAGE BIT(TIF_GUARDED_STORAGE) 79 #define _TIF_ISOLATE_BP_GUEST BIT(TIF_ISOLATE_BP_GUEST) 80 #define _TIF_PER_TRAP BIT(TIF_PER_TRAP) 81 #define _TIF_31BIT BIT(TIF_31BIT) 82 #define _TIF_SINGLE_STEP BIT(TIF_SINGLE_STEP) 83 #define _TIF_BLOCK_STEP BIT(TIF_BLOCK_STEP) 84 #define _TIF_UPROBE_SINGLESTEP BIT(TIF_UPROBE_SINGLESTEP) 85 86 #endif /* _ASM_THREAD_INFO_H */ 87