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#ifndef __ASSEMBLY__ 21#include <linux/cache.h> 22#include <asm/processor.h> 23#include <asm/page.h> 24#include <asm/accounting.h> 25 26#define SLB_PRELOAD_NR 16U 27/* 28 * low level task data. 29 */ 30struct thread_info { 31 int preempt_count; /* 0 => preemptable, 32 <0 => BUG */ 33 unsigned long local_flags; /* private flags for thread */ 34#ifdef CONFIG_LIVEPATCH 35 unsigned long *livepatch_sp; 36#endif 37#if defined(CONFIG_VIRT_CPU_ACCOUNTING_NATIVE) && defined(CONFIG_PPC32) 38 struct cpu_accounting_data accounting; 39#endif 40 unsigned char slb_preload_nr; 41 unsigned char slb_preload_tail; 42 u32 slb_preload_esid[SLB_PRELOAD_NR]; 43 44 /* low level flags - has atomic operations done on it */ 45 unsigned long flags ____cacheline_aligned_in_smp; 46}; 47 48/* 49 * macros/functions for gaining access to the thread information structure 50 */ 51#define INIT_THREAD_INFO(tsk) \ 52{ \ 53 .preempt_count = INIT_PREEMPT_COUNT, \ 54 .flags = 0, \ 55} 56 57#define THREAD_SIZE_ORDER (THREAD_SHIFT - PAGE_SHIFT) 58 59/* how to get the thread information struct from C */ 60extern int arch_dup_task_struct(struct task_struct *dst, struct task_struct *src); 61 62#ifdef CONFIG_PPC_BOOK3S_64 63void arch_setup_new_exec(void); 64#define arch_setup_new_exec arch_setup_new_exec 65#endif 66 67#endif /* __ASSEMBLY__ */ 68 69/* 70 * thread information flag bit numbers 71 */ 72#define TIF_SYSCALL_TRACE 0 /* syscall trace active */ 73#define TIF_SIGPENDING 1 /* signal pending */ 74#define TIF_NEED_RESCHED 2 /* rescheduling necessary */ 75#define TIF_FSCHECK 3 /* Check FS is USER_DS on return */ 76#define TIF_SYSCALL_EMU 4 /* syscall emulation active */ 77#define TIF_RESTORE_TM 5 /* need to restore TM FP/VEC/VSX */ 78#define TIF_PATCH_PENDING 6 /* pending live patching update */ 79#define TIF_SYSCALL_AUDIT 7 /* syscall auditing active */ 80#define TIF_SINGLESTEP 8 /* singlestepping active */ 81#define TIF_NOHZ 9 /* in adaptive nohz mode */ 82#define TIF_SECCOMP 10 /* secure computing */ 83#define TIF_RESTOREALL 11 /* Restore all regs (implies NOERROR) */ 84#define TIF_NOERROR 12 /* Force successful syscall return */ 85#define TIF_NOTIFY_RESUME 13 /* callback before returning to user */ 86#define TIF_UPROBE 14 /* breakpointed or single-stepping */ 87#define TIF_SYSCALL_TRACEPOINT 15 /* syscall tracepoint instrumentation */ 88#define TIF_EMULATE_STACK_STORE 16 /* Is an instruction emulation 89 for stack store? */ 90#define TIF_MEMDIE 17 /* is terminating due to OOM killer */ 91#if defined(CONFIG_PPC64) 92#define TIF_ELF2ABI 18 /* function descriptors must die! */ 93#endif 94#define TIF_POLLING_NRFLAG 19 /* true if poll_idle() is polling TIF_NEED_RESCHED */ 95#define TIF_32BIT 20 /* 32 bit binary */ 96 97/* as above, but as bit values */ 98#define _TIF_SYSCALL_TRACE (1<<TIF_SYSCALL_TRACE) 99#define _TIF_SIGPENDING (1<<TIF_SIGPENDING) 100#define _TIF_NEED_RESCHED (1<<TIF_NEED_RESCHED) 101#define _TIF_POLLING_NRFLAG (1<<TIF_POLLING_NRFLAG) 102#define _TIF_32BIT (1<<TIF_32BIT) 103#define _TIF_RESTORE_TM (1<<TIF_RESTORE_TM) 104#define _TIF_PATCH_PENDING (1<<TIF_PATCH_PENDING) 105#define _TIF_SYSCALL_AUDIT (1<<TIF_SYSCALL_AUDIT) 106#define _TIF_SINGLESTEP (1<<TIF_SINGLESTEP) 107#define _TIF_SECCOMP (1<<TIF_SECCOMP) 108#define _TIF_RESTOREALL (1<<TIF_RESTOREALL) 109#define _TIF_NOERROR (1<<TIF_NOERROR) 110#define _TIF_NOTIFY_RESUME (1<<TIF_NOTIFY_RESUME) 111#define _TIF_UPROBE (1<<TIF_UPROBE) 112#define _TIF_SYSCALL_TRACEPOINT (1<<TIF_SYSCALL_TRACEPOINT) 113#define _TIF_EMULATE_STACK_STORE (1<<TIF_EMULATE_STACK_STORE) 114#define _TIF_NOHZ (1<<TIF_NOHZ) 115#define _TIF_FSCHECK (1<<TIF_FSCHECK) 116#define _TIF_SYSCALL_EMU (1<<TIF_SYSCALL_EMU) 117#define _TIF_SYSCALL_DOTRACE (_TIF_SYSCALL_TRACE | _TIF_SYSCALL_AUDIT | \ 118 _TIF_SECCOMP | _TIF_SYSCALL_TRACEPOINT | \ 119 _TIF_NOHZ | _TIF_SYSCALL_EMU) 120 121#define _TIF_USER_WORK_MASK (_TIF_SIGPENDING | _TIF_NEED_RESCHED | \ 122 _TIF_NOTIFY_RESUME | _TIF_UPROBE | \ 123 _TIF_RESTORE_TM | _TIF_PATCH_PENDING | \ 124 _TIF_FSCHECK) 125#define _TIF_PERSYSCALL_MASK (_TIF_RESTOREALL|_TIF_NOERROR) 126 127/* Bits in local_flags */ 128/* Don't move TLF_NAPPING without adjusting the code in entry_32.S */ 129#define TLF_NAPPING 0 /* idle thread enabled NAP mode */ 130#define TLF_SLEEPING 1 /* suspend code enabled SLEEP mode */ 131#define TLF_LAZY_MMU 3 /* tlb_batch is active */ 132#define TLF_RUNLATCH 4 /* Is the runlatch enabled? */ 133 134#define _TLF_NAPPING (1 << TLF_NAPPING) 135#define _TLF_SLEEPING (1 << TLF_SLEEPING) 136#define _TLF_LAZY_MMU (1 << TLF_LAZY_MMU) 137#define _TLF_RUNLATCH (1 << TLF_RUNLATCH) 138 139#ifndef __ASSEMBLY__ 140 141static inline bool test_thread_local_flags(unsigned int flags) 142{ 143 struct thread_info *ti = current_thread_info(); 144 return (ti->local_flags & flags) != 0; 145} 146 147#ifdef CONFIG_PPC64 148#define is_32bit_task() (test_thread_flag(TIF_32BIT)) 149#else 150#define is_32bit_task() (1) 151#endif 152 153#if defined(CONFIG_PPC64) 154#define is_elf2_task() (test_thread_flag(TIF_ELF2ABI)) 155#else 156#define is_elf2_task() (0) 157#endif 158 159#endif /* !__ASSEMBLY__ */ 160 161#endif /* __KERNEL__ */ 162 163#endif /* _ASM_POWERPC_THREAD_INFO_H */ 164