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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
6cb7bfeb | 2 | /* thread_info.h: PowerPC low-level thread information |
1da177e4 LT |
3 | * adapted from the i386 version by Paul Mackerras |
4 | * | |
5 | * Copyright (C) 2002 David Howells (dhowells@redhat.com) | |
6 | * - Incorporating suggestions made by Linus Torvalds and Dave Miller | |
7 | */ | |
8 | ||
6cb7bfeb DG |
9 | #ifndef _ASM_POWERPC_THREAD_INFO_H |
10 | #define _ASM_POWERPC_THREAD_INFO_H | |
1da177e4 LT |
11 | |
12 | #ifdef __KERNEL__ | |
13 | ||
47613407 | 14 | #define THREAD_SHIFT CONFIG_THREAD_SHIFT |
6cb7bfeb DG |
15 | |
16 | #define THREAD_SIZE (1 << THREAD_SHIFT) | |
17 | ||
9778b696 | 18 | #ifdef CONFIG_PPC64 |
a87e810f | 19 | #define CURRENT_THREAD_INFO(dest, sp) stringify_in_c(clrrdi dest, sp, THREAD_SHIFT) |
9778b696 | 20 | #else |
a87e810f | 21 | #define CURRENT_THREAD_INFO(dest, sp) stringify_in_c(rlwinm dest, sp, 0, 0, 31-THREAD_SHIFT) |
9778b696 SY |
22 | #endif |
23 | ||
1da177e4 | 24 | #ifndef __ASSEMBLY__ |
1da177e4 LT |
25 | #include <linux/cache.h> |
26 | #include <asm/processor.h> | |
27 | #include <asm/page.h> | |
28 | #include <linux/stringify.h> | |
c223c903 | 29 | #include <asm/accounting.h> |
1da177e4 LT |
30 | |
31 | /* | |
32 | * low level task data. | |
33 | */ | |
34 | struct thread_info { | |
35 | struct task_struct *task; /* main task structure */ | |
1da177e4 | 36 | int cpu; /* cpu we're on */ |
6cb7bfeb DG |
37 | int preempt_count; /* 0 => preemptable, |
38 | <0 => BUG */ | |
f39224a8 | 39 | unsigned long local_flags; /* private flags for thread */ |
5d31a96e ME |
40 | #ifdef CONFIG_LIVEPATCH |
41 | unsigned long *livepatch_sp; | |
c223c903 CL |
42 | #endif |
43 | #if defined(CONFIG_VIRT_CPU_ACCOUNTING_NATIVE) && defined(CONFIG_PPC32) | |
44 | struct cpu_accounting_data accounting; | |
5d31a96e | 45 | #endif |
1da177e4 LT |
46 | /* low level flags - has atomic operations done on it */ |
47 | unsigned long flags ____cacheline_aligned_in_smp; | |
48 | }; | |
49 | ||
50 | /* | |
51 | * macros/functions for gaining access to the thread information structure | |
1da177e4 LT |
52 | */ |
53 | #define INIT_THREAD_INFO(tsk) \ | |
54 | { \ | |
55 | .task = &tsk, \ | |
1da177e4 | 56 | .cpu = 0, \ |
c99e6efe | 57 | .preempt_count = INIT_PREEMPT_COUNT, \ |
1da177e4 LT |
58 | .flags = 0, \ |
59 | } | |
60 | ||
b69c49b7 | 61 | #define THREAD_SIZE_ORDER (THREAD_SHIFT - PAGE_SHIFT) |
328985b2 | 62 | |
1da177e4 LT |
63 | /* how to get the thread information struct from C */ |
64 | static inline struct thread_info *current_thread_info(void) | |
65 | { | |
a87e810f ME |
66 | unsigned long val; |
67 | ||
68 | asm (CURRENT_THREAD_INFO(%0,1) : "=r" (val)); | |
69 | ||
70 | return (struct thread_info *)val; | |
1da177e4 LT |
71 | } |
72 | ||
fd70d9f9 | 73 | extern int arch_dup_task_struct(struct task_struct *dst, struct task_struct *src); |
1da177e4 LT |
74 | #endif /* __ASSEMBLY__ */ |
75 | ||
1da177e4 LT |
76 | /* |
77 | * thread information flag bit numbers | |
78 | */ | |
79 | #define TIF_SYSCALL_TRACE 0 /* syscall trace active */ | |
a583f1b5 SE |
80 | #define TIF_SIGPENDING 1 /* signal pending */ |
81 | #define TIF_NEED_RESCHED 2 /* rescheduling necessary */ | |
82 | #define TIF_POLLING_NRFLAG 3 /* true if poll_idle() is polling | |
1da177e4 | 83 | TIF_NEED_RESCHED */ |
a583f1b5 | 84 | #define TIF_32BIT 4 /* 32 bit binary */ |
d31626f7 | 85 | #define TIF_RESTORE_TM 5 /* need to restore TM FP/VEC/VSX */ |
a768f784 | 86 | #define TIF_PATCH_PENDING 6 /* pending live patching update */ |
a583f1b5 SE |
87 | #define TIF_SYSCALL_AUDIT 7 /* syscall auditing active */ |
88 | #define TIF_SINGLESTEP 8 /* singlestepping active */ | |
22ecbe8d | 89 | #define TIF_NOHZ 9 /* in adaptive nohz mode */ |
a583f1b5 SE |
90 | #define TIF_SECCOMP 10 /* secure computing */ |
91 | #define TIF_RESTOREALL 11 /* Restore all regs (implies NOERROR) */ | |
92 | #define TIF_NOERROR 12 /* Force successful syscall return */ | |
7d6d637d | 93 | #define TIF_NOTIFY_RESUME 13 /* callback before returning to user */ |
8b7b80b9 | 94 | #define TIF_UPROBE 14 /* breakpointed or single-stepping */ |
02424d89 | 95 | #define TIF_SYSCALL_TRACEPOINT 15 /* syscall tracepoint instrumentation */ |
f0d1128f TC |
96 | #define TIF_EMULATE_STACK_STORE 16 /* Is an instruction emulation |
97 | for stack store? */ | |
22ecbe8d | 98 | #define TIF_MEMDIE 17 /* is terminating due to OOM killer */ |
373c76d6 RR |
99 | #if defined(CONFIG_PPC64) |
100 | #define TIF_ELF2ABI 18 /* function descriptors must die! */ | |
101 | #endif | |
1da177e4 LT |
102 | |
103 | /* as above, but as bit values */ | |
104 | #define _TIF_SYSCALL_TRACE (1<<TIF_SYSCALL_TRACE) | |
1da177e4 LT |
105 | #define _TIF_SIGPENDING (1<<TIF_SIGPENDING) |
106 | #define _TIF_NEED_RESCHED (1<<TIF_NEED_RESCHED) | |
107 | #define _TIF_POLLING_NRFLAG (1<<TIF_POLLING_NRFLAG) | |
108 | #define _TIF_32BIT (1<<TIF_32BIT) | |
d31626f7 | 109 | #define _TIF_RESTORE_TM (1<<TIF_RESTORE_TM) |
a768f784 | 110 | #define _TIF_PATCH_PENDING (1<<TIF_PATCH_PENDING) |
1da177e4 LT |
111 | #define _TIF_SYSCALL_AUDIT (1<<TIF_SYSCALL_AUDIT) |
112 | #define _TIF_SINGLESTEP (1<<TIF_SINGLESTEP) | |
113 | #define _TIF_SECCOMP (1<<TIF_SECCOMP) | |
401d1f02 | 114 | #define _TIF_RESTOREALL (1<<TIF_RESTOREALL) |
401d1f02 | 115 | #define _TIF_NOERROR (1<<TIF_NOERROR) |
7d6d637d | 116 | #define _TIF_NOTIFY_RESUME (1<<TIF_NOTIFY_RESUME) |
8b7b80b9 | 117 | #define _TIF_UPROBE (1<<TIF_UPROBE) |
02424d89 | 118 | #define _TIF_SYSCALL_TRACEPOINT (1<<TIF_SYSCALL_TRACEPOINT) |
f0d1128f | 119 | #define _TIF_EMULATE_STACK_STORE (1<<TIF_EMULATE_STACK_STORE) |
22ecbe8d | 120 | #define _TIF_NOHZ (1<<TIF_NOHZ) |
10ea8343 | 121 | #define _TIF_SYSCALL_DOTRACE (_TIF_SYSCALL_TRACE | _TIF_SYSCALL_AUDIT | \ |
22ecbe8d LZ |
122 | _TIF_SECCOMP | _TIF_SYSCALL_TRACEPOINT | \ |
123 | _TIF_NOHZ) | |
1da177e4 | 124 | |
7d6d637d | 125 | #define _TIF_USER_WORK_MASK (_TIF_SIGPENDING | _TIF_NEED_RESCHED | \ |
d31626f7 | 126 | _TIF_NOTIFY_RESUME | _TIF_UPROBE | \ |
a768f784 | 127 | _TIF_RESTORE_TM | _TIF_PATCH_PENDING) |
1bd79336 | 128 | #define _TIF_PERSYSCALL_MASK (_TIF_RESTOREALL|_TIF_NOERROR) |
1da177e4 | 129 | |
f39224a8 PM |
130 | /* Bits in local_flags */ |
131 | /* Don't move TLF_NAPPING without adjusting the code in entry_32.S */ | |
132 | #define TLF_NAPPING 0 /* idle thread enabled NAP mode */ | |
a560643e | 133 | #define TLF_SLEEPING 1 /* suspend code enabled SLEEP mode */ |
d6bf29b4 | 134 | #define TLF_LAZY_MMU 3 /* tlb_batch is active */ |
fe1952fc | 135 | #define TLF_RUNLATCH 4 /* Is the runlatch enabled? */ |
f39224a8 PM |
136 | |
137 | #define _TLF_NAPPING (1 << TLF_NAPPING) | |
a560643e | 138 | #define _TLF_SLEEPING (1 << TLF_SLEEPING) |
d6bf29b4 | 139 | #define _TLF_LAZY_MMU (1 << TLF_LAZY_MMU) |
fe1952fc | 140 | #define _TLF_RUNLATCH (1 << TLF_RUNLATCH) |
7a10174e RM |
141 | |
142 | #ifndef __ASSEMBLY__ | |
a465f9b6 | 143 | |
fe1952fc BH |
144 | static inline bool test_thread_local_flags(unsigned int flags) |
145 | { | |
146 | struct thread_info *ti = current_thread_info(); | |
147 | return (ti->local_flags & flags) != 0; | |
148 | } | |
149 | ||
a465f9b6 AB |
150 | #ifdef CONFIG_PPC64 |
151 | #define is_32bit_task() (test_thread_flag(TIF_32BIT)) | |
152 | #else | |
153 | #define is_32bit_task() (1) | |
154 | #endif | |
155 | ||
373c76d6 RR |
156 | #if defined(CONFIG_PPC64) |
157 | #define is_elf2_task() (test_thread_flag(TIF_ELF2ABI)) | |
158 | #else | |
159 | #define is_elf2_task() (0) | |
160 | #endif | |
161 | ||
7a10174e | 162 | #endif /* !__ASSEMBLY__ */ |
f39224a8 | 163 | |
1da177e4 LT |
164 | #endif /* __KERNEL__ */ |
165 | ||
6cb7bfeb | 166 | #endif /* _ASM_POWERPC_THREAD_INFO_H */ |