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178 lines
5.6 KiB
178 lines
5.6 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
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/* thread_info.h: PowerPC low-level thread information |
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* adapted from the i386 version by Paul Mackerras |
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* |
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* Copyright (C) 2002 David Howells ([email protected]) |
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* - Incorporating suggestions made by Linus Torvalds and Dave Miller |
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*/ |
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#ifndef _ASM_POWERPC_THREAD_INFO_H |
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#define _ASM_POWERPC_THREAD_INFO_H |
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#include <asm/asm-const.h> |
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#include <asm/page.h> |
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#ifdef __KERNEL__ |
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#if defined(CONFIG_VMAP_STACK) && CONFIG_THREAD_SHIFT < PAGE_SHIFT |
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#define THREAD_SHIFT PAGE_SHIFT |
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#else |
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#define THREAD_SHIFT CONFIG_THREAD_SHIFT |
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#endif |
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#define THREAD_SIZE (1 << THREAD_SHIFT) |
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/* |
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* By aligning VMAP'd stacks to 2 * THREAD_SIZE, we can detect overflow by |
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* checking sp & (1 << THREAD_SHIFT), which we can do cheaply in the entry |
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* assembly. |
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*/ |
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#ifdef CONFIG_VMAP_STACK |
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#define THREAD_ALIGN_SHIFT (THREAD_SHIFT + 1) |
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#else |
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#define THREAD_ALIGN_SHIFT THREAD_SHIFT |
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#endif |
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#define THREAD_ALIGN (1 << THREAD_ALIGN_SHIFT) |
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#ifndef __ASSEMBLY__ |
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#include <linux/cache.h> |
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#include <asm/processor.h> |
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#include <asm/page.h> |
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#include <asm/accounting.h> |
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#define SLB_PRELOAD_NR 16U |
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/* |
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* low level task data. |
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*/ |
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struct thread_info { |
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int preempt_count; /* 0 => preemptable, |
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<0 => BUG */ |
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unsigned long local_flags; /* private flags for thread */ |
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#ifdef CONFIG_LIVEPATCH |
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unsigned long *livepatch_sp; |
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#endif |
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#if defined(CONFIG_VIRT_CPU_ACCOUNTING_NATIVE) && defined(CONFIG_PPC32) |
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struct cpu_accounting_data accounting; |
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#endif |
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unsigned char slb_preload_nr; |
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unsigned char slb_preload_tail; |
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u32 slb_preload_esid[SLB_PRELOAD_NR]; |
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/* low level flags - has atomic operations done on it */ |
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unsigned long flags ____cacheline_aligned_in_smp; |
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}; |
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/* |
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* macros/functions for gaining access to the thread information structure |
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*/ |
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#define INIT_THREAD_INFO(tsk) \ |
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{ \ |
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.preempt_count = INIT_PREEMPT_COUNT, \ |
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.flags = 0, \ |
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} |
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#define THREAD_SIZE_ORDER (THREAD_SHIFT - PAGE_SHIFT) |
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/* how to get the thread information struct from C */ |
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extern int arch_dup_task_struct(struct task_struct *dst, struct task_struct *src); |
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#ifdef CONFIG_PPC_BOOK3S_64 |
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void arch_setup_new_exec(void); |
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#define arch_setup_new_exec arch_setup_new_exec |
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#endif |
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#endif /* __ASSEMBLY__ */ |
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/* |
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* thread information flag bit numbers |
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*/ |
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#define TIF_SYSCALL_TRACE 0 /* syscall trace active */ |
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#define TIF_SIGPENDING 1 /* signal pending */ |
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#define TIF_NEED_RESCHED 2 /* rescheduling necessary */ |
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#define TIF_SYSCALL_EMU 4 /* syscall emulation active */ |
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#define TIF_RESTORE_TM 5 /* need to restore TM FP/VEC/VSX */ |
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#define TIF_PATCH_PENDING 6 /* pending live patching update */ |
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#define TIF_SYSCALL_AUDIT 7 /* syscall auditing active */ |
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#define TIF_SINGLESTEP 8 /* singlestepping active */ |
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#define TIF_NOHZ 9 /* in adaptive nohz mode */ |
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#define TIF_SECCOMP 10 /* secure computing */ |
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#define TIF_RESTOREALL 11 /* Restore all regs (implies NOERROR) */ |
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#define TIF_NOERROR 12 /* Force successful syscall return */ |
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#define TIF_NOTIFY_RESUME 13 /* callback before returning to user */ |
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#define TIF_UPROBE 14 /* breakpointed or single-stepping */ |
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#define TIF_SYSCALL_TRACEPOINT 15 /* syscall tracepoint instrumentation */ |
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#define TIF_EMULATE_STACK_STORE 16 /* Is an instruction emulation |
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for stack store? */ |
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#define TIF_MEMDIE 17 /* is terminating due to OOM killer */ |
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#if defined(CONFIG_PPC64) |
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#define TIF_ELF2ABI 18 /* function descriptors must die! */ |
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#endif |
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#define TIF_POLLING_NRFLAG 19 /* true if poll_idle() is polling TIF_NEED_RESCHED */ |
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#define TIF_32BIT 20 /* 32 bit binary */ |
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/* as above, but as bit values */ |
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#define _TIF_SYSCALL_TRACE (1<<TIF_SYSCALL_TRACE) |
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#define _TIF_SIGPENDING (1<<TIF_SIGPENDING) |
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#define _TIF_NEED_RESCHED (1<<TIF_NEED_RESCHED) |
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#define _TIF_POLLING_NRFLAG (1<<TIF_POLLING_NRFLAG) |
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#define _TIF_32BIT (1<<TIF_32BIT) |
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#define _TIF_RESTORE_TM (1<<TIF_RESTORE_TM) |
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#define _TIF_PATCH_PENDING (1<<TIF_PATCH_PENDING) |
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#define _TIF_SYSCALL_AUDIT (1<<TIF_SYSCALL_AUDIT) |
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#define _TIF_SINGLESTEP (1<<TIF_SINGLESTEP) |
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#define _TIF_SECCOMP (1<<TIF_SECCOMP) |
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#define _TIF_RESTOREALL (1<<TIF_RESTOREALL) |
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#define _TIF_NOERROR (1<<TIF_NOERROR) |
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#define _TIF_NOTIFY_RESUME (1<<TIF_NOTIFY_RESUME) |
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#define _TIF_UPROBE (1<<TIF_UPROBE) |
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#define _TIF_SYSCALL_TRACEPOINT (1<<TIF_SYSCALL_TRACEPOINT) |
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#define _TIF_EMULATE_STACK_STORE (1<<TIF_EMULATE_STACK_STORE) |
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#define _TIF_NOHZ (1<<TIF_NOHZ) |
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#define _TIF_SYSCALL_EMU (1<<TIF_SYSCALL_EMU) |
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#define _TIF_SYSCALL_DOTRACE (_TIF_SYSCALL_TRACE | _TIF_SYSCALL_AUDIT | \ |
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_TIF_SECCOMP | _TIF_SYSCALL_TRACEPOINT | \ |
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_TIF_NOHZ | _TIF_SYSCALL_EMU) |
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#define _TIF_USER_WORK_MASK (_TIF_SIGPENDING | _TIF_NEED_RESCHED | \ |
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_TIF_NOTIFY_RESUME | _TIF_UPROBE | \ |
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_TIF_RESTORE_TM | _TIF_PATCH_PENDING) |
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#define _TIF_PERSYSCALL_MASK (_TIF_RESTOREALL|_TIF_NOERROR) |
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/* Bits in local_flags */ |
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/* Don't move TLF_NAPPING without adjusting the code in entry_32.S */ |
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#define TLF_NAPPING 0 /* idle thread enabled NAP mode */ |
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#define TLF_SLEEPING 1 /* suspend code enabled SLEEP mode */ |
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#define TLF_LAZY_MMU 3 /* tlb_batch is active */ |
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#define TLF_RUNLATCH 4 /* Is the runlatch enabled? */ |
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#define _TLF_NAPPING (1 << TLF_NAPPING) |
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#define _TLF_SLEEPING (1 << TLF_SLEEPING) |
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#define _TLF_LAZY_MMU (1 << TLF_LAZY_MMU) |
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#define _TLF_RUNLATCH (1 << TLF_RUNLATCH) |
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#ifndef __ASSEMBLY__ |
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static inline bool test_thread_local_flags(unsigned int flags) |
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{ |
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struct thread_info *ti = current_thread_info(); |
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return (ti->local_flags & flags) != 0; |
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} |
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#ifdef CONFIG_COMPAT |
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#define is_32bit_task() (test_thread_flag(TIF_32BIT)) |
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#else |
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#define is_32bit_task() (IS_ENABLED(CONFIG_PPC32)) |
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#endif |
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#if defined(CONFIG_PPC64) |
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#define is_elf2_task() (test_thread_flag(TIF_ELF2ABI)) |
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#else |
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#define is_elf2_task() (0) |
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#endif |
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#endif /* !__ASSEMBLY__ */ |
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#endif /* __KERNEL__ */ |
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#endif /* _ASM_POWERPC_THREAD_INFO_H */
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