1 /* SPDX-License-Identifier: GPL-2.0 */
2 /* thread_info.h: PowerPC low-level thread information
3 * adapted from the i386 version by Paul Mackerras
5 * Copyright (C) 2002 David Howells (dhowells@redhat.com)
6 * - Incorporating suggestions made by Linus Torvalds and Dave Miller
9 #ifndef _ASM_POWERPC_THREAD_INFO_H
10 #define _ASM_POWERPC_THREAD_INFO_H
12 #include <asm/asm-const.h>
16 #define THREAD_SHIFT CONFIG_THREAD_SHIFT
18 #define THREAD_SIZE (1 << THREAD_SHIFT)
21 #define CURRENT_THREAD_INFO(dest, sp) stringify_in_c(clrrdi dest, sp, THREAD_SHIFT)
23 #define CURRENT_THREAD_INFO(dest, sp) stringify_in_c(rlwinm dest, sp, 0, 0, 31-THREAD_SHIFT)
27 #include <linux/cache.h>
28 #include <asm/processor.h>
30 #include <asm/accounting.h>
32 #define SLB_PRELOAD_NR 16U
34 * low level task data.
37 struct task_struct *task; /* main task structure */
38 int cpu; /* cpu we're on */
39 int preempt_count; /* 0 => preemptable,
41 unsigned long local_flags; /* private flags for thread */
42 #ifdef CONFIG_LIVEPATCH
43 unsigned long *livepatch_sp;
45 #if defined(CONFIG_VIRT_CPU_ACCOUNTING_NATIVE) && defined(CONFIG_PPC32)
46 struct cpu_accounting_data accounting;
48 unsigned char slb_preload_nr;
49 unsigned char slb_preload_tail;
50 u32 slb_preload_esid[SLB_PRELOAD_NR];
52 /* low level flags - has atomic operations done on it */
53 unsigned long flags ____cacheline_aligned_in_smp;
57 * macros/functions for gaining access to the thread information structure
59 #define INIT_THREAD_INFO(tsk) \
63 .preempt_count = INIT_PREEMPT_COUNT, \
67 #define THREAD_SIZE_ORDER (THREAD_SHIFT - PAGE_SHIFT)
69 /* how to get the thread information struct from C */
70 static inline struct thread_info *current_thread_info(void)
74 asm (CURRENT_THREAD_INFO(%0,1) : "=r" (val));
76 return (struct thread_info *)val;
79 extern int arch_dup_task_struct(struct task_struct *dst, struct task_struct *src);
81 #ifdef CONFIG_PPC_BOOK3S_64
82 void arch_setup_new_exec(void);
83 #define arch_setup_new_exec arch_setup_new_exec
86 #endif /* __ASSEMBLY__ */
89 * thread information flag bit numbers
91 #define TIF_SYSCALL_TRACE 0 /* syscall trace active */
92 #define TIF_SIGPENDING 1 /* signal pending */
93 #define TIF_NEED_RESCHED 2 /* rescheduling necessary */
94 #define TIF_FSCHECK 3 /* Check FS is USER_DS on return */
95 #define TIF_SYSCALL_EMU 4 /* syscall emulation active */
96 #define TIF_RESTORE_TM 5 /* need to restore TM FP/VEC/VSX */
97 #define TIF_PATCH_PENDING 6 /* pending live patching update */
98 #define TIF_SYSCALL_AUDIT 7 /* syscall auditing active */
99 #define TIF_SINGLESTEP 8 /* singlestepping active */
100 #define TIF_NOHZ 9 /* in adaptive nohz mode */
101 #define TIF_SECCOMP 10 /* secure computing */
102 #define TIF_RESTOREALL 11 /* Restore all regs (implies NOERROR) */
103 #define TIF_NOERROR 12 /* Force successful syscall return */
104 #define TIF_NOTIFY_RESUME 13 /* callback before returning to user */
105 #define TIF_UPROBE 14 /* breakpointed or single-stepping */
106 #define TIF_SYSCALL_TRACEPOINT 15 /* syscall tracepoint instrumentation */
107 #define TIF_EMULATE_STACK_STORE 16 /* Is an instruction emulation
109 #define TIF_MEMDIE 17 /* is terminating due to OOM killer */
110 #if defined(CONFIG_PPC64)
111 #define TIF_ELF2ABI 18 /* function descriptors must die! */
113 #define TIF_POLLING_NRFLAG 19 /* true if poll_idle() is polling TIF_NEED_RESCHED */
114 #define TIF_32BIT 20 /* 32 bit binary */
116 /* as above, but as bit values */
117 #define _TIF_SYSCALL_TRACE (1<<TIF_SYSCALL_TRACE)
118 #define _TIF_SIGPENDING (1<<TIF_SIGPENDING)
119 #define _TIF_NEED_RESCHED (1<<TIF_NEED_RESCHED)
120 #define _TIF_POLLING_NRFLAG (1<<TIF_POLLING_NRFLAG)
121 #define _TIF_32BIT (1<<TIF_32BIT)
122 #define _TIF_RESTORE_TM (1<<TIF_RESTORE_TM)
123 #define _TIF_PATCH_PENDING (1<<TIF_PATCH_PENDING)
124 #define _TIF_SYSCALL_AUDIT (1<<TIF_SYSCALL_AUDIT)
125 #define _TIF_SINGLESTEP (1<<TIF_SINGLESTEP)
126 #define _TIF_SECCOMP (1<<TIF_SECCOMP)
127 #define _TIF_RESTOREALL (1<<TIF_RESTOREALL)
128 #define _TIF_NOERROR (1<<TIF_NOERROR)
129 #define _TIF_NOTIFY_RESUME (1<<TIF_NOTIFY_RESUME)
130 #define _TIF_UPROBE (1<<TIF_UPROBE)
131 #define _TIF_SYSCALL_TRACEPOINT (1<<TIF_SYSCALL_TRACEPOINT)
132 #define _TIF_EMULATE_STACK_STORE (1<<TIF_EMULATE_STACK_STORE)
133 #define _TIF_NOHZ (1<<TIF_NOHZ)
134 #define _TIF_FSCHECK (1<<TIF_FSCHECK)
135 #define _TIF_SYSCALL_EMU (1<<TIF_SYSCALL_EMU)
136 #define _TIF_SYSCALL_DOTRACE (_TIF_SYSCALL_TRACE | _TIF_SYSCALL_AUDIT | \
137 _TIF_SECCOMP | _TIF_SYSCALL_TRACEPOINT | \
138 _TIF_NOHZ | _TIF_SYSCALL_EMU)
140 #define _TIF_USER_WORK_MASK (_TIF_SIGPENDING | _TIF_NEED_RESCHED | \
141 _TIF_NOTIFY_RESUME | _TIF_UPROBE | \
142 _TIF_RESTORE_TM | _TIF_PATCH_PENDING | \
144 #define _TIF_PERSYSCALL_MASK (_TIF_RESTOREALL|_TIF_NOERROR)
146 /* Bits in local_flags */
147 /* Don't move TLF_NAPPING without adjusting the code in entry_32.S */
148 #define TLF_NAPPING 0 /* idle thread enabled NAP mode */
149 #define TLF_SLEEPING 1 /* suspend code enabled SLEEP mode */
150 #define TLF_LAZY_MMU 3 /* tlb_batch is active */
151 #define TLF_RUNLATCH 4 /* Is the runlatch enabled? */
153 #define _TLF_NAPPING (1 << TLF_NAPPING)
154 #define _TLF_SLEEPING (1 << TLF_SLEEPING)
155 #define _TLF_LAZY_MMU (1 << TLF_LAZY_MMU)
156 #define _TLF_RUNLATCH (1 << TLF_RUNLATCH)
160 static inline bool test_thread_local_flags(unsigned int flags)
162 struct thread_info *ti = current_thread_info();
163 return (ti->local_flags & flags) != 0;
167 #define is_32bit_task() (test_thread_flag(TIF_32BIT))
169 #define is_32bit_task() (1)
172 #if defined(CONFIG_PPC64)
173 #define is_elf2_task() (test_thread_flag(TIF_ELF2ABI))
175 #define is_elf2_task() (0)
178 #endif /* !__ASSEMBLY__ */
180 #endif /* __KERNEL__ */
182 #endif /* _ASM_POWERPC_THREAD_INFO_H */