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 #include <asm/asm-const.h> 13 14 #ifdef __KERNEL__ 15 16 #define THREAD_SHIFT CONFIG_THREAD_SHIFT 17 18 #define THREAD_SIZE (1 << THREAD_SHIFT) 19 20 #ifdef CONFIG_PPC64 21 #define CURRENT_THREAD_INFO(dest, sp) stringify_in_c(clrrdi dest, sp, THREAD_SHIFT) 22 #else 23 #define CURRENT_THREAD_INFO(dest, sp) stringify_in_c(rlwinm dest, sp, 0, 0, 31-THREAD_SHIFT) 24 #endif 25 26 #ifndef __ASSEMBLY__ 27 #include <linux/cache.h> 28 #include <asm/processor.h> 29 #include <asm/page.h> 30 #include <asm/accounting.h> 31 32 #define SLB_PRELOAD_NR 16U 33 /* 34 * low level task data. 35 */ 36 struct thread_info { 37 struct task_struct *task; /* main task structure */ 38 int cpu; /* cpu we're on */ 39 int preempt_count; /* 0 => preemptable, 40 <0 => BUG */ 41 unsigned long local_flags; /* private flags for thread */ 42 #ifdef CONFIG_LIVEPATCH 43 unsigned long *livepatch_sp; 44 #endif 45 #if defined(CONFIG_VIRT_CPU_ACCOUNTING_NATIVE) && defined(CONFIG_PPC32) 46 struct cpu_accounting_data accounting; 47 #endif 48 unsigned char slb_preload_nr; 49 unsigned char slb_preload_tail; 50 u32 slb_preload_esid[SLB_PRELOAD_NR]; 51 52 /* low level flags - has atomic operations done on it */ 53 unsigned long flags ____cacheline_aligned_in_smp; 54 }; 55 56 /* 57 * macros/functions for gaining access to the thread information structure 58 */ 59 #define INIT_THREAD_INFO(tsk) \ 60 { \ 61 .task = &tsk, \ 62 .cpu = 0, \ 63 .preempt_count = INIT_PREEMPT_COUNT, \ 64 .flags = 0, \ 65 } 66 67 #define THREAD_SIZE_ORDER (THREAD_SHIFT - PAGE_SHIFT) 68 69 /* how to get the thread information struct from C */ 70 static inline struct thread_info *current_thread_info(void) 71 { 72 unsigned long val; 73 74 asm (CURRENT_THREAD_INFO(%0,1) : "=r" (val)); 75 76 return (struct thread_info *)val; 77 } 78 79 extern int arch_dup_task_struct(struct task_struct *dst, struct task_struct *src); 80 81 #ifdef CONFIG_PPC_BOOK3S_64 82 void arch_setup_new_exec(void); 83 #define arch_setup_new_exec arch_setup_new_exec 84 #endif 85 86 #endif /* __ASSEMBLY__ */ 87 88 /* 89 * thread information flag bit numbers 90 */ 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 108 for stack store? */ 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! */ 112 #endif 113 #define TIF_POLLING_NRFLAG 19 /* true if poll_idle() is polling TIF_NEED_RESCHED */ 114 #define TIF_32BIT 20 /* 32 bit binary */ 115 116 /* 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) 139 140 #define _TIF_USER_WORK_MASK (_TIF_SIGPENDING | _TIF_NEED_RESCHED | \ 141 _TIF_NOTIFY_RESUME | _TIF_UPROBE | \ 142 _TIF_RESTORE_TM | _TIF_PATCH_PENDING | \ 143 _TIF_FSCHECK) 144 #define _TIF_PERSYSCALL_MASK (_TIF_RESTOREALL|_TIF_NOERROR) 145 146 /* 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? */ 152 153 #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) 157 158 #ifndef __ASSEMBLY__ 159 160 static inline bool test_thread_local_flags(unsigned int flags) 161 { 162 struct thread_info *ti = current_thread_info(); 163 return (ti->local_flags & flags) != 0; 164 } 165 166 #ifdef CONFIG_PPC64 167 #define is_32bit_task() (test_thread_flag(TIF_32BIT)) 168 #else 169 #define is_32bit_task() (1) 170 #endif 171 172 #if defined(CONFIG_PPC64) 173 #define is_elf2_task() (test_thread_flag(TIF_ELF2ABI)) 174 #else 175 #define is_elf2_task() (0) 176 #endif 177 178 #endif /* !__ASSEMBLY__ */ 179 180 #endif /* __KERNEL__ */ 181 182 #endif /* _ASM_POWERPC_THREAD_INFO_H */ 183