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 4 * 5 * Copyright (C) 2002 David Howells (dhowells@redhat.com) 6 * - Incorporating suggestions made by Linus Torvalds and Dave Miller 7 */ 8 9 #ifndef _ASM_POWERPC_THREAD_INFO_H 10 #define _ASM_POWERPC_THREAD_INFO_H 11 12 #ifdef __KERNEL__ 13 14 #define THREAD_SHIFT CONFIG_THREAD_SHIFT 15 16 #define THREAD_SIZE (1 << THREAD_SHIFT) 17 18 #ifdef CONFIG_PPC64 19 #define CURRENT_THREAD_INFO(dest, sp) stringify_in_c(clrrdi dest, sp, THREAD_SHIFT) 20 #else 21 #define CURRENT_THREAD_INFO(dest, sp) stringify_in_c(rlwinm dest, sp, 0, 0, 31-THREAD_SHIFT) 22 #endif 23 24 #ifndef __ASSEMBLY__ 25 #include <linux/cache.h> 26 #include <asm/processor.h> 27 #include <asm/page.h> 28 #include <linux/stringify.h> 29 #include <asm/accounting.h> 30 31 /* 32 * low level task data. 33 */ 34 struct thread_info { 35 struct task_struct *task; /* main task structure */ 36 int cpu; /* cpu we're on */ 37 int preempt_count; /* 0 => preemptable, 38 <0 => BUG */ 39 unsigned long local_flags; /* private flags for thread */ 40 #ifdef CONFIG_LIVEPATCH 41 unsigned long *livepatch_sp; 42 #endif 43 #if defined(CONFIG_VIRT_CPU_ACCOUNTING_NATIVE) && defined(CONFIG_PPC32) 44 struct cpu_accounting_data accounting; 45 #endif 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 52 */ 53 #define INIT_THREAD_INFO(tsk) \ 54 { \ 55 .task = &tsk, \ 56 .cpu = 0, \ 57 .preempt_count = INIT_PREEMPT_COUNT, \ 58 .flags = 0, \ 59 } 60 61 #define THREAD_SIZE_ORDER (THREAD_SHIFT - PAGE_SHIFT) 62 63 /* how to get the thread information struct from C */ 64 static inline struct thread_info *current_thread_info(void) 65 { 66 unsigned long val; 67 68 asm (CURRENT_THREAD_INFO(%0,1) : "=r" (val)); 69 70 return (struct thread_info *)val; 71 } 72 73 extern int arch_dup_task_struct(struct task_struct *dst, struct task_struct *src); 74 #endif /* __ASSEMBLY__ */ 75 76 /* 77 * thread information flag bit numbers 78 */ 79 #define TIF_SYSCALL_TRACE 0 /* syscall trace active */ 80 #define TIF_SIGPENDING 1 /* signal pending */ 81 #define TIF_NEED_RESCHED 2 /* rescheduling necessary */ 82 #define TIF_FSCHECK 3 /* Check FS is USER_DS on return */ 83 #define TIF_32BIT 4 /* 32 bit binary */ 84 #define TIF_RESTORE_TM 5 /* need to restore TM FP/VEC/VSX */ 85 #define TIF_PATCH_PENDING 6 /* pending live patching update */ 86 #define TIF_SYSCALL_AUDIT 7 /* syscall auditing active */ 87 #define TIF_SINGLESTEP 8 /* singlestepping active */ 88 #define TIF_NOHZ 9 /* in adaptive nohz mode */ 89 #define TIF_SECCOMP 10 /* secure computing */ 90 #define TIF_RESTOREALL 11 /* Restore all regs (implies NOERROR) */ 91 #define TIF_NOERROR 12 /* Force successful syscall return */ 92 #define TIF_NOTIFY_RESUME 13 /* callback before returning to user */ 93 #define TIF_UPROBE 14 /* breakpointed or single-stepping */ 94 #define TIF_SYSCALL_TRACEPOINT 15 /* syscall tracepoint instrumentation */ 95 #define TIF_EMULATE_STACK_STORE 16 /* Is an instruction emulation 96 for stack store? */ 97 #define TIF_MEMDIE 17 /* is terminating due to OOM killer */ 98 #if defined(CONFIG_PPC64) 99 #define TIF_ELF2ABI 18 /* function descriptors must die! */ 100 #endif 101 #define TIF_POLLING_NRFLAG 19 /* true if poll_idle() is polling TIF_NEED_RESCHED */ 102 103 /* as above, but as bit values */ 104 #define _TIF_SYSCALL_TRACE (1<<TIF_SYSCALL_TRACE) 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) 109 #define _TIF_RESTORE_TM (1<<TIF_RESTORE_TM) 110 #define _TIF_PATCH_PENDING (1<<TIF_PATCH_PENDING) 111 #define _TIF_SYSCALL_AUDIT (1<<TIF_SYSCALL_AUDIT) 112 #define _TIF_SINGLESTEP (1<<TIF_SINGLESTEP) 113 #define _TIF_SECCOMP (1<<TIF_SECCOMP) 114 #define _TIF_RESTOREALL (1<<TIF_RESTOREALL) 115 #define _TIF_NOERROR (1<<TIF_NOERROR) 116 #define _TIF_NOTIFY_RESUME (1<<TIF_NOTIFY_RESUME) 117 #define _TIF_UPROBE (1<<TIF_UPROBE) 118 #define _TIF_SYSCALL_TRACEPOINT (1<<TIF_SYSCALL_TRACEPOINT) 119 #define _TIF_EMULATE_STACK_STORE (1<<TIF_EMULATE_STACK_STORE) 120 #define _TIF_NOHZ (1<<TIF_NOHZ) 121 #define _TIF_FSCHECK (1<<TIF_FSCHECK) 122 #define _TIF_SYSCALL_DOTRACE (_TIF_SYSCALL_TRACE | _TIF_SYSCALL_AUDIT | \ 123 _TIF_SECCOMP | _TIF_SYSCALL_TRACEPOINT | \ 124 _TIF_NOHZ) 125 126 #define _TIF_USER_WORK_MASK (_TIF_SIGPENDING | _TIF_NEED_RESCHED | \ 127 _TIF_NOTIFY_RESUME | _TIF_UPROBE | \ 128 _TIF_RESTORE_TM | _TIF_PATCH_PENDING | \ 129 _TIF_FSCHECK) 130 #define _TIF_PERSYSCALL_MASK (_TIF_RESTOREALL|_TIF_NOERROR) 131 132 /* Bits in local_flags */ 133 /* Don't move TLF_NAPPING without adjusting the code in entry_32.S */ 134 #define TLF_NAPPING 0 /* idle thread enabled NAP mode */ 135 #define TLF_SLEEPING 1 /* suspend code enabled SLEEP mode */ 136 #define TLF_LAZY_MMU 3 /* tlb_batch is active */ 137 #define TLF_RUNLATCH 4 /* Is the runlatch enabled? */ 138 139 #define _TLF_NAPPING (1 << TLF_NAPPING) 140 #define _TLF_SLEEPING (1 << TLF_SLEEPING) 141 #define _TLF_LAZY_MMU (1 << TLF_LAZY_MMU) 142 #define _TLF_RUNLATCH (1 << TLF_RUNLATCH) 143 144 #ifndef __ASSEMBLY__ 145 146 static inline bool test_thread_local_flags(unsigned int flags) 147 { 148 struct thread_info *ti = current_thread_info(); 149 return (ti->local_flags & flags) != 0; 150 } 151 152 #ifdef CONFIG_PPC64 153 #define is_32bit_task() (test_thread_flag(TIF_32BIT)) 154 #else 155 #define is_32bit_task() (1) 156 #endif 157 158 #if defined(CONFIG_PPC64) 159 #define is_elf2_task() (test_thread_flag(TIF_ELF2ABI)) 160 #else 161 #define is_elf2_task() (0) 162 #endif 163 164 #endif /* !__ASSEMBLY__ */ 165 166 #endif /* __KERNEL__ */ 167 168 #endif /* _ASM_POWERPC_THREAD_INFO_H */ 169