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| 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_SINGLE_STEP 21 /* This task is single stepped */ |
| 73 | #define TIF_BLOCK_STEP 22 /* This task is block stepped */ |
| 74 | #define TIF_UPROBE_SINGLESTEP 23 /* This task is uprobe single stepped */ |
| 75 | |
| 76 | #define _TIF_ASCE_PRIMARY BIT(TIF_ASCE_PRIMARY) |
| 77 | #define _TIF_GUARDED_STORAGE BIT(TIF_GUARDED_STORAGE) |
| 78 | #define _TIF_ISOLATE_BP_GUEST BIT(TIF_ISOLATE_BP_GUEST) |
| 79 | #define _TIF_PER_TRAP BIT(TIF_PER_TRAP) |
| 80 | #define _TIF_SINGLE_STEP BIT(TIF_SINGLE_STEP) |
| 81 | #define _TIF_BLOCK_STEP BIT(TIF_BLOCK_STEP) |
| 82 | #define _TIF_UPROBE_SINGLESTEP BIT(TIF_UPROBE_SINGLESTEP) |
| 83 | |
| 84 | #endif /* _ASM_THREAD_INFO_H */ |
| 85 |
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