Release 4.14 arch/powerpc/include/asm/thread_info.h
/* SPDX-License-Identifier: GPL-2.0 */
/* thread_info.h: PowerPC low-level thread information
* adapted from the i386 version by Paul Mackerras
*
* Copyright (C) 2002 David Howells (dhowells@redhat.com)
* - Incorporating suggestions made by Linus Torvalds and Dave Miller
*/
#ifndef _ASM_POWERPC_THREAD_INFO_H
#define _ASM_POWERPC_THREAD_INFO_H
#ifdef __KERNEL__
#define THREAD_SHIFT CONFIG_THREAD_SHIFT
#define THREAD_SIZE (1 << THREAD_SHIFT)
#ifdef CONFIG_PPC64
#define CURRENT_THREAD_INFO(dest, sp) stringify_in_c(clrrdi dest, sp, THREAD_SHIFT)
#else
#define CURRENT_THREAD_INFO(dest, sp) stringify_in_c(rlwinm dest, sp, 0, 0, 31-THREAD_SHIFT)
#endif
#ifndef __ASSEMBLY__
#include <linux/cache.h>
#include <asm/processor.h>
#include <asm/page.h>
#include <linux/stringify.h>
#include <asm/accounting.h>
/*
* low level task data.
*/
struct thread_info {
struct task_struct *task; /* main task structure */
int cpu; /* cpu we're on */
int preempt_count; /* 0 => preemptable,
<0 => BUG */
unsigned long local_flags; /* private flags for thread */
#ifdef CONFIG_LIVEPATCH
unsigned long *livepatch_sp;
#endif
#if defined(CONFIG_VIRT_CPU_ACCOUNTING_NATIVE) && defined(CONFIG_PPC32)
struct cpu_accounting_data accounting;
#endif
/* low level flags - has atomic operations done on it */
unsigned long flags ____cacheline_aligned_in_smp;
};
/*
* macros/functions for gaining access to the thread information structure
*/
#define INIT_THREAD_INFO(tsk) \
{ \
.task = &tsk, \
.cpu = 0, \
.preempt_count = INIT_PREEMPT_COUNT, \
.flags = 0, \
}
#define init_thread_info (init_thread_union.thread_info)
#define init_stack (init_thread_union.stack)
#define THREAD_SIZE_ORDER (THREAD_SHIFT - PAGE_SHIFT)
/* how to get the thread information struct from C */
static inline struct thread_info *current_thread_info(void)
{
unsigned long val;
asm (CURRENT_THREAD_INFO(%0,1) : "=r" (val));
return (struct thread_info *)val;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Anton Blanchard | 13 | 54.17% | 1 | 33.33% |
| Michael Ellerman | 6 | 25.00% | 1 | 33.33% |
| David Gibson | 5 | 20.83% | 1 | 33.33% |
| Total | 24 | 100.00% | 3 | 100.00% |
#endif /* __ASSEMBLY__ */
/*
* thread information flag bit numbers
*/
#define TIF_SYSCALL_TRACE 0
/* syscall trace active */
#define TIF_SIGPENDING 1
/* signal pending */
#define TIF_NEED_RESCHED 2
/* rescheduling necessary */
#define TIF_POLLING_NRFLAG 3
/* true if poll_idle() is polling
TIF_NEED_RESCHED */
#define TIF_32BIT 4
/* 32 bit binary */
#define TIF_RESTORE_TM 5
/* need to restore TM FP/VEC/VSX */
#define TIF_PATCH_PENDING 6
/* pending live patching update */
#define TIF_SYSCALL_AUDIT 7
/* syscall auditing active */
#define TIF_SINGLESTEP 8
/* singlestepping active */
#define TIF_NOHZ 9
/* in adaptive nohz mode */
#define TIF_SECCOMP 10
/* secure computing */
#define TIF_RESTOREALL 11
/* Restore all regs (implies NOERROR) */
#define TIF_NOERROR 12
/* Force successful syscall return */
#define TIF_NOTIFY_RESUME 13
/* callback before returning to user */
#define TIF_UPROBE 14
/* breakpointed or single-stepping */
#define TIF_SYSCALL_TRACEPOINT 15
/* syscall tracepoint instrumentation */
#define TIF_EMULATE_STACK_STORE 16
/* Is an instruction emulation
for stack store? */
#define TIF_MEMDIE 17
/* is terminating due to OOM killer */
#if defined(CONFIG_PPC64)
#define TIF_ELF2ABI 18
/* function descriptors must die! */
#endif
/* as above, but as bit values */
#define _TIF_SYSCALL_TRACE (1<<TIF_SYSCALL_TRACE)
#define _TIF_SIGPENDING (1<<TIF_SIGPENDING)
#define _TIF_NEED_RESCHED (1<<TIF_NEED_RESCHED)
#define _TIF_POLLING_NRFLAG (1<<TIF_POLLING_NRFLAG)
#define _TIF_32BIT (1<<TIF_32BIT)
#define _TIF_RESTORE_TM (1<<TIF_RESTORE_TM)
#define _TIF_PATCH_PENDING (1<<TIF_PATCH_PENDING)
#define _TIF_SYSCALL_AUDIT (1<<TIF_SYSCALL_AUDIT)
#define _TIF_SINGLESTEP (1<<TIF_SINGLESTEP)
#define _TIF_SECCOMP (1<<TIF_SECCOMP)
#define _TIF_RESTOREALL (1<<TIF_RESTOREALL)
#define _TIF_NOERROR (1<<TIF_NOERROR)
#define _TIF_NOTIFY_RESUME (1<<TIF_NOTIFY_RESUME)
#define _TIF_UPROBE (1<<TIF_UPROBE)
#define _TIF_SYSCALL_TRACEPOINT (1<<TIF_SYSCALL_TRACEPOINT)
#define _TIF_EMULATE_STACK_STORE (1<<TIF_EMULATE_STACK_STORE)
#define _TIF_NOHZ (1<<TIF_NOHZ)
#define _TIF_SYSCALL_DOTRACE (_TIF_SYSCALL_TRACE | _TIF_SYSCALL_AUDIT | \
_TIF_SECCOMP | _TIF_SYSCALL_TRACEPOINT | \
_TIF_NOHZ)
#define _TIF_USER_WORK_MASK (_TIF_SIGPENDING | _TIF_NEED_RESCHED | \
_TIF_NOTIFY_RESUME | _TIF_UPROBE | \
_TIF_RESTORE_TM | _TIF_PATCH_PENDING)
#define _TIF_PERSYSCALL_MASK (_TIF_RESTOREALL|_TIF_NOERROR)
/* Bits in local_flags */
/* Don't move TLF_NAPPING without adjusting the code in entry_32.S */
#define TLF_NAPPING 0
/* idle thread enabled NAP mode */
#define TLF_SLEEPING 1
/* suspend code enabled SLEEP mode */
#define TLF_LAZY_MMU 3
/* tlb_batch is active */
#define TLF_RUNLATCH 4
/* Is the runlatch enabled? */
#define _TLF_NAPPING (1 << TLF_NAPPING)
#define _TLF_SLEEPING (1 << TLF_SLEEPING)
#define _TLF_LAZY_MMU (1 << TLF_LAZY_MMU)
#define _TLF_RUNLATCH (1 << TLF_RUNLATCH)
#ifndef __ASSEMBLY__
static inline bool test_thread_local_flags(unsigned int flags)
{
struct thread_info *ti = current_thread_info();
return (ti->local_flags & flags) != 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Benjamin Herrenschmidt | 30 | 100.00% | 1 | 100.00% |
| Total | 30 | 100.00% | 1 | 100.00% |
#ifdef CONFIG_PPC64
#define is_32bit_task() (test_thread_flag(TIF_32BIT))
#else
#define is_32bit_task() (1)
#endif
#if defined(CONFIG_PPC64)
#define is_elf2_task() (test_thread_flag(TIF_ELF2ABI))
#else
#define is_elf2_task() (0)
#endif
#endif /* !__ASSEMBLY__ */
#endif /* __KERNEL__ */
#endif /* _ASM_POWERPC_THREAD_INFO_H */
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Anton Blanchard | 134 | 28.45% | 3 | 7.50% |
| Paul Mackerras | 56 | 11.89% | 8 | 20.00% |
| Benjamin Herrenschmidt | 39 | 8.28% | 1 | 2.50% |
| Rusty Russell | 33 | 7.01% | 1 | 2.50% |
| Stuart Yoder | 23 | 4.88% | 1 | 2.50% |
| Christophe Leroy | 20 | 4.25% | 1 | 2.50% |
| Michael Ellerman | 19 | 4.03% | 3 | 7.50% |
| David Woodhouse | 19 | 4.03% | 1 | 2.50% |
| David Gibson | 16 | 3.40% | 2 | 5.00% |
| Roland McGrath | 15 | 3.18% | 2 | 5.00% |
| Li Zhong | 12 | 2.55% | 1 | 2.50% |
| Andrew Morton | 10 | 2.12% | 1 | 2.50% |
| Josh Poimboeuf | 10 | 2.12% | 1 | 2.50% |
| Andrea Arcangeli | 10 | 2.12% | 2 | 5.00% |
| Peter Zijlstra | 10 | 2.12% | 2 | 5.00% |
| Stéphane Eranian | 10 | 2.12% | 1 | 2.50% |
| Ian Munsie | 9 | 1.91% | 1 | 2.50% |
| Ananth N. Mavinakayanahalli | 9 | 1.91% | 1 | 2.50% |
| Tiejun Chen | 9 | 1.91% | 1 | 2.50% |
| Yuri Tikhonov | 3 | 0.64% | 1 | 2.50% |
| Hamish Martin | 1 | 0.21% | 1 | 2.50% |
| Jesper Juhl | 1 | 0.21% | 1 | 2.50% |
| Richard Weinberger | 1 | 0.21% | 1 | 2.50% |
| FUJITA Tomonori | 1 | 0.21% | 1 | 2.50% |
| Greg Kroah-Hartman | 1 | 0.21% | 1 | 2.50% |
| Total | 471 | 100.00% | 40 | 100.00% |
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