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x86: merge thread_info.h
Simple merge of both thread_info_32.h and thread_info_64.h into thread_info.h. Comments for #ifndef __ASM_THREAD_INFO_H and #ifdef __KERNEL__ are the same. Signed-off-by: Christoph Lameter <clameter@sgi.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Christoph Lameter
Ingo Molnar
parent
1c7d06d419
commit
2052e8d40a
@ -1,10 +1,372 @@
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/* thread_info.h: low-level thread information
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*
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* Copyright (C) 2002 David Howells (dhowells@redhat.com)
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* - Incorporating suggestions made by Linus Torvalds and Dave Miller
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*/
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#ifndef _ASM_X86_THREAD_INFO_H
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#define _ASM_X86_THREAD_INFO_H
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#ifdef CONFIG_X86_32
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# include "thread_info_32.h"
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#else
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# include "thread_info_64.h"
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#include <linux/compiler.h>
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#include <asm/page.h>
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#ifndef __ASSEMBLY__
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#include <asm/processor.h>
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#endif
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/*
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* low level task data that entry.S needs immediate access to
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* - this struct should fit entirely inside of one cache line
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* - this struct shares the supervisor stack pages
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* - if the contents of this structure are changed,
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* the assembly constants must also be changed
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*/
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#ifndef __ASSEMBLY__
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struct thread_info {
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struct task_struct *task; /* main task structure */
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struct exec_domain *exec_domain; /* execution domain */
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unsigned long flags; /* low level flags */
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unsigned long status; /* thread-synchronous flags */
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__u32 cpu; /* current CPU */
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int preempt_count; /* 0 => preemptable,
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<0 => BUG */
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mm_segment_t addr_limit; /* thread address space:
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0-0xBFFFFFFF user-thread
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0-0xFFFFFFFF kernel-thread
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*/
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void *sysenter_return;
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struct restart_block restart_block;
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unsigned long previous_esp; /* ESP of the previous stack in
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case of nested (IRQ) stacks
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*/
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__u8 supervisor_stack[0];
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};
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#else /* !__ASSEMBLY__ */
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#include <asm/asm-offsets.h>
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#endif
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#define PREEMPT_ACTIVE 0x10000000
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#ifdef CONFIG_4KSTACKS
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#define THREAD_SIZE (4096)
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#else
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#define THREAD_SIZE (8192)
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#endif
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#define STACK_WARN (THREAD_SIZE/8)
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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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* preempt_count needs to be 1 initially, until the scheduler is functional.
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*/
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#ifndef __ASSEMBLY__
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#define INIT_THREAD_INFO(tsk) \
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{ \
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.task = &tsk, \
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.exec_domain = &default_exec_domain, \
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.flags = 0, \
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.cpu = 0, \
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.preempt_count = 1, \
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.addr_limit = KERNEL_DS, \
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.restart_block = { \
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.fn = do_no_restart_syscall, \
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}, \
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}
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#define init_thread_info (init_thread_union.thread_info)
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#define init_stack (init_thread_union.stack)
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/* how to get the current stack pointer from C */
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register unsigned long current_stack_pointer asm("esp") __used;
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/* how to get the thread information struct from C */
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static inline struct thread_info *current_thread_info(void)
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{
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return (struct thread_info *)
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(current_stack_pointer & ~(THREAD_SIZE - 1));
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}
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/* thread information allocation */
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#ifdef CONFIG_DEBUG_STACK_USAGE
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#define alloc_thread_info(tsk) ((struct thread_info *) \
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__get_free_pages(GFP_KERNEL | __GFP_ZERO, get_order(THREAD_SIZE)))
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#else
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#define alloc_thread_info(tsk) ((struct thread_info *) \
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__get_free_pages(GFP_KERNEL, get_order(THREAD_SIZE)))
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#endif
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#else /* !__ASSEMBLY__ */
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/* how to get the thread information struct from ASM */
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#define GET_THREAD_INFO(reg) \
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movl $-THREAD_SIZE, reg; \
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andl %esp, reg
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/* use this one if reg already contains %esp */
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#define GET_THREAD_INFO_WITH_ESP(reg) \
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andl $-THREAD_SIZE, reg
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#endif
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/*
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* thread information flags
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* - these are process state flags that various
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* assembly files may need to access
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* - pending work-to-be-done flags are in LSW
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* - other flags in MSW
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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_SINGLESTEP 3 /* restore singlestep on return to
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user mode */
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#define TIF_IRET 4 /* return with iret */
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#define TIF_SYSCALL_EMU 5 /* syscall emulation active */
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#define TIF_SYSCALL_AUDIT 6 /* syscall auditing active */
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#define TIF_SECCOMP 7 /* secure computing */
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#define TIF_RESTORE_SIGMASK 8 /* restore signal mask in do_signal() */
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#define TIF_HRTICK_RESCHED 9 /* reprogram hrtick timer */
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#define TIF_MEMDIE 16
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#define TIF_DEBUG 17 /* uses debug registers */
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#define TIF_IO_BITMAP 18 /* uses I/O bitmap */
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#define TIF_FREEZE 19 /* is freezing for suspend */
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#define TIF_NOTSC 20 /* TSC is not accessible in userland */
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#define TIF_FORCED_TF 21 /* true if TF in eflags artificially */
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#define TIF_DEBUGCTLMSR 22 /* uses thread_struct.debugctlmsr */
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#define TIF_DS_AREA_MSR 23 /* uses thread_struct.ds_area_msr */
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#define TIF_BTS_TRACE_TS 24 /* record scheduling event timestamps */
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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_SINGLESTEP (1 << TIF_SINGLESTEP)
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#define _TIF_IRET (1 << TIF_IRET)
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#define _TIF_SYSCALL_EMU (1 << TIF_SYSCALL_EMU)
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#define _TIF_SYSCALL_AUDIT (1 << TIF_SYSCALL_AUDIT)
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#define _TIF_SECCOMP (1 << TIF_SECCOMP)
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#define _TIF_RESTORE_SIGMASK (1 << TIF_RESTORE_SIGMASK)
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#define _TIF_HRTICK_RESCHED (1 << TIF_HRTICK_RESCHED)
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#define _TIF_DEBUG (1 << TIF_DEBUG)
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#define _TIF_IO_BITMAP (1 << TIF_IO_BITMAP)
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#define _TIF_FREEZE (1 << TIF_FREEZE)
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#define _TIF_NOTSC (1 << TIF_NOTSC)
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#define _TIF_FORCED_TF (1 << TIF_FORCED_TF)
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#define _TIF_DEBUGCTLMSR (1 << TIF_DEBUGCTLMSR)
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#define _TIF_DS_AREA_MSR (1 << TIF_DS_AREA_MSR)
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#define _TIF_BTS_TRACE_TS (1 << TIF_BTS_TRACE_TS)
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/* work to do on interrupt/exception return */
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#define _TIF_WORK_MASK \
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(0x0000FFFF & ~(_TIF_SYSCALL_TRACE | _TIF_SYSCALL_AUDIT | \
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_TIF_SECCOMP | _TIF_SYSCALL_EMU))
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/* work to do on any return to u-space */
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#define _TIF_ALLWORK_MASK (0x0000FFFF & ~_TIF_SECCOMP)
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/* flags to check in __switch_to() */
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#define _TIF_WORK_CTXSW \
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(_TIF_IO_BITMAP | _TIF_NOTSC | _TIF_DEBUGCTLMSR | \
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_TIF_DS_AREA_MSR | _TIF_BTS_TRACE_TS)
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#define _TIF_WORK_CTXSW_PREV _TIF_WORK_CTXSW
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#define _TIF_WORK_CTXSW_NEXT (_TIF_WORK_CTXSW | _TIF_DEBUG)
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/*
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* Thread-synchronous status.
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*
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* This is different from the flags in that nobody else
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* ever touches our thread-synchronous status, so we don't
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* have to worry about atomic accesses.
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*/
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#define TS_USEDFPU 0x0001 /* FPU was used by this task
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this quantum (SMP) */
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#define TS_POLLING 0x0002 /* True if in idle loop
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and not sleeping */
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#define tsk_is_polling(t) (task_thread_info(t)->status & TS_POLLING)
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#else /* X86_32 */
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#include <asm/page.h>
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#include <asm/types.h>
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#include <asm/pda.h>
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/*
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* low level task data that entry.S needs immediate access to
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* - this struct should fit entirely inside of one cache line
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* - this struct shares the supervisor stack pages
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*/
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#ifndef __ASSEMBLY__
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struct task_struct;
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struct exec_domain;
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#include <asm/processor.h>
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struct thread_info {
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struct task_struct *task; /* main task structure */
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struct exec_domain *exec_domain; /* execution domain */
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__u32 flags; /* low level flags */
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__u32 status; /* thread synchronous flags */
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__u32 cpu; /* current CPU */
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int preempt_count; /* 0 => preemptable,
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<0 => BUG */
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mm_segment_t addr_limit;
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struct restart_block restart_block;
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#ifdef CONFIG_IA32_EMULATION
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void __user *sysenter_return;
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#endif
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};
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#endif
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/*
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* macros/functions for gaining access to the thread information structure
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* preempt_count needs to be 1 initially, until the scheduler is functional.
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*/
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#ifndef __ASSEMBLY__
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#define INIT_THREAD_INFO(tsk) \
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{ \
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.task = &tsk, \
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.exec_domain = &default_exec_domain, \
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.flags = 0, \
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.cpu = 0, \
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.preempt_count = 1, \
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.addr_limit = KERNEL_DS, \
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.restart_block = { \
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.fn = do_no_restart_syscall, \
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}, \
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}
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#define init_thread_info (init_thread_union.thread_info)
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#define init_stack (init_thread_union.stack)
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static inline struct thread_info *current_thread_info(void)
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{
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struct thread_info *ti;
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ti = (void *)(read_pda(kernelstack) + PDA_STACKOFFSET - THREAD_SIZE);
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return ti;
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}
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/* do not use in interrupt context */
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static inline struct thread_info *stack_thread_info(void)
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{
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struct thread_info *ti;
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asm("andq %%rsp,%0; " : "=r" (ti) : "0" (~(THREAD_SIZE - 1)));
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return ti;
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}
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/* thread information allocation */
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#ifdef CONFIG_DEBUG_STACK_USAGE
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#define THREAD_FLAGS (GFP_KERNEL | __GFP_ZERO)
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#else
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#define THREAD_FLAGS GFP_KERNEL
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#endif
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#define alloc_thread_info(tsk) \
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((struct thread_info *)__get_free_pages(THREAD_FLAGS, THREAD_ORDER))
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#else /* !__ASSEMBLY__ */
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/* how to get the thread information struct from ASM */
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#define GET_THREAD_INFO(reg) \
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movq %gs:pda_kernelstack,reg ; \
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subq $(THREAD_SIZE-PDA_STACKOFFSET),reg
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#endif
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/*
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* thread information flags
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* - these are process state flags that various assembly files
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* may need to access
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* - pending work-to-be-done flags are in LSW
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* - other flags in MSW
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* Warning: layout of LSW is hardcoded in entry.S
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*/
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#define TIF_SYSCALL_TRACE 0 /* syscall trace active */
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#define TIF_SIGPENDING 2 /* signal pending */
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#define TIF_NEED_RESCHED 3 /* rescheduling necessary */
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#define TIF_SINGLESTEP 4 /* reenable singlestep on user return*/
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#define TIF_IRET 5 /* force IRET */
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#define TIF_SYSCALL_AUDIT 7 /* syscall auditing active */
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#define TIF_SECCOMP 8 /* secure computing */
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#define TIF_RESTORE_SIGMASK 9 /* restore signal mask in do_signal */
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#define TIF_MCE_NOTIFY 10 /* notify userspace of an MCE */
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#define TIF_HRTICK_RESCHED 11 /* reprogram hrtick timer */
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/* 16 free */
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#define TIF_IA32 17 /* 32bit process */
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#define TIF_FORK 18 /* ret_from_fork */
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#define TIF_ABI_PENDING 19
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#define TIF_MEMDIE 20
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#define TIF_DEBUG 21 /* uses debug registers */
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#define TIF_IO_BITMAP 22 /* uses I/O bitmap */
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#define TIF_FREEZE 23 /* is freezing for suspend */
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#define TIF_FORCED_TF 24 /* true if TF in eflags artificially */
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#define TIF_DEBUGCTLMSR 25 /* uses thread_struct.debugctlmsr */
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#define TIF_DS_AREA_MSR 26 /* uses thread_struct.ds_area_msr */
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#define TIF_BTS_TRACE_TS 27 /* record scheduling event timestamps */
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#define TIF_NOTSC 28 /* TSC is not accessible in userland */
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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_SINGLESTEP (1 << TIF_SINGLESTEP)
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#define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED)
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#define _TIF_IRET (1 << TIF_IRET)
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#define _TIF_SYSCALL_AUDIT (1 << TIF_SYSCALL_AUDIT)
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#define _TIF_SECCOMP (1 << TIF_SECCOMP)
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#define _TIF_RESTORE_SIGMASK (1 << TIF_RESTORE_SIGMASK)
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#define _TIF_MCE_NOTIFY (1 << TIF_MCE_NOTIFY)
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#define _TIF_HRTICK_RESCHED (1 << TIF_HRTICK_RESCHED)
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#define _TIF_IA32 (1 << TIF_IA32)
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#define _TIF_FORK (1 << TIF_FORK)
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#define _TIF_ABI_PENDING (1 << TIF_ABI_PENDING)
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#define _TIF_DEBUG (1 << TIF_DEBUG)
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#define _TIF_IO_BITMAP (1 << TIF_IO_BITMAP)
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#define _TIF_FREEZE (1 << TIF_FREEZE)
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#define _TIF_FORCED_TF (1 << TIF_FORCED_TF)
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#define _TIF_DEBUGCTLMSR (1 << TIF_DEBUGCTLMSR)
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#define _TIF_DS_AREA_MSR (1 << TIF_DS_AREA_MSR)
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#define _TIF_BTS_TRACE_TS (1 << TIF_BTS_TRACE_TS)
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#define _TIF_NOTSC (1 << TIF_NOTSC)
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/* work to do on interrupt/exception return */
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#define _TIF_WORK_MASK \
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(0x0000FFFF & \
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~(_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT|_TIF_SINGLESTEP|_TIF_SECCOMP))
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/* work to do on any return to user space */
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#define _TIF_ALLWORK_MASK (0x0000FFFF & ~_TIF_SECCOMP)
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#define _TIF_DO_NOTIFY_MASK \
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(_TIF_SIGPENDING|_TIF_SINGLESTEP|_TIF_MCE_NOTIFY|_TIF_HRTICK_RESCHED)
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/* flags to check in __switch_to() */
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#define _TIF_WORK_CTXSW \
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(_TIF_IO_BITMAP|_TIF_DEBUGCTLMSR|_TIF_DS_AREA_MSR|_TIF_BTS_TRACE_TS|_TIF_NOTSC)
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#define _TIF_WORK_CTXSW_PREV _TIF_WORK_CTXSW
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#define _TIF_WORK_CTXSW_NEXT (_TIF_WORK_CTXSW|_TIF_DEBUG)
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#define PREEMPT_ACTIVE 0x10000000
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/*
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* Thread-synchronous status.
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*
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* This is different from the flags in that nobody else
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* ever touches our thread-synchronous status, so we don't
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* have to worry about atomic accesses.
|
||||
*/
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#define TS_USEDFPU 0x0001 /* FPU was used by this task
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this quantum (SMP) */
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#define TS_COMPAT 0x0002 /* 32bit syscall active */
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#define TS_POLLING 0x0004 /* true if in idle loop
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and not sleeping */
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#define tsk_is_polling(t) (task_thread_info(t)->status & TS_POLLING)
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#endif /* !X86_32 */
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#ifndef __ASSEMBLY__
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extern void arch_task_cache_init(void);
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extern void free_thread_info(struct thread_info *ti);
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@ -1,196 +0,0 @@
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/* thread_info.h: i386 low-level thread information
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*
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* Copyright (C) 2002 David Howells (dhowells@redhat.com)
|
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* - Incorporating suggestions made by Linus Torvalds and Dave Miller
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*/
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#ifndef _ASM_THREAD_INFO_H
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#define _ASM_THREAD_INFO_H
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#ifdef __KERNEL__
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#include <linux/compiler.h>
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#include <asm/page.h>
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#ifndef __ASSEMBLY__
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#include <asm/processor.h>
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#endif
|
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|
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/*
|
||||
* low level task data that entry.S needs immediate access to
|
||||
* - this struct should fit entirely inside of one cache line
|
||||
* - this struct shares the supervisor stack pages
|
||||
* - if the contents of this structure are changed,
|
||||
* the assembly constants must also be changed
|
||||
*/
|
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#ifndef __ASSEMBLY__
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|
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struct thread_info {
|
||||
struct task_struct *task; /* main task structure */
|
||||
struct exec_domain *exec_domain; /* execution domain */
|
||||
unsigned long flags; /* low level flags */
|
||||
unsigned long status; /* thread-synchronous flags */
|
||||
__u32 cpu; /* current CPU */
|
||||
int preempt_count; /* 0 => preemptable,
|
||||
<0 => BUG */
|
||||
mm_segment_t addr_limit; /* thread address space:
|
||||
0-0xBFFFFFFF user-thread
|
||||
0-0xFFFFFFFF kernel-thread
|
||||
*/
|
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void *sysenter_return;
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struct restart_block restart_block;
|
||||
unsigned long previous_esp; /* ESP of the previous stack in
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||||
case of nested (IRQ) stacks
|
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*/
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__u8 supervisor_stack[0];
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};
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#else /* !__ASSEMBLY__ */
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#include <asm/asm-offsets.h>
|
||||
|
||||
#endif
|
||||
|
||||
#define PREEMPT_ACTIVE 0x10000000
|
||||
#ifdef CONFIG_4KSTACKS
|
||||
#define THREAD_SIZE (4096)
|
||||
#else
|
||||
#define THREAD_SIZE (8192)
|
||||
#endif
|
||||
|
||||
#define STACK_WARN (THREAD_SIZE/8)
|
||||
/*
|
||||
* macros/functions for gaining access to the thread information structure
|
||||
*
|
||||
* preempt_count needs to be 1 initially, until the scheduler is functional.
|
||||
*/
|
||||
#ifndef __ASSEMBLY__
|
||||
|
||||
#define INIT_THREAD_INFO(tsk) \
|
||||
{ \
|
||||
.task = &tsk, \
|
||||
.exec_domain = &default_exec_domain, \
|
||||
.flags = 0, \
|
||||
.cpu = 0, \
|
||||
.preempt_count = 1, \
|
||||
.addr_limit = KERNEL_DS, \
|
||||
.restart_block = { \
|
||||
.fn = do_no_restart_syscall, \
|
||||
}, \
|
||||
}
|
||||
|
||||
#define init_thread_info (init_thread_union.thread_info)
|
||||
#define init_stack (init_thread_union.stack)
|
||||
|
||||
|
||||
/* how to get the current stack pointer from C */
|
||||
register unsigned long current_stack_pointer asm("esp") __used;
|
||||
|
||||
/* how to get the thread information struct from C */
|
||||
static inline struct thread_info *current_thread_info(void)
|
||||
{
|
||||
return (struct thread_info *)
|
||||
(current_stack_pointer & ~(THREAD_SIZE - 1));
|
||||
}
|
||||
|
||||
/* thread information allocation */
|
||||
#ifdef CONFIG_DEBUG_STACK_USAGE
|
||||
#define alloc_thread_info(tsk) ((struct thread_info *) \
|
||||
__get_free_pages(GFP_KERNEL | __GFP_ZERO, get_order(THREAD_SIZE)))
|
||||
#else
|
||||
#define alloc_thread_info(tsk) ((struct thread_info *) \
|
||||
__get_free_pages(GFP_KERNEL, get_order(THREAD_SIZE)))
|
||||
#endif
|
||||
|
||||
#else /* !__ASSEMBLY__ */
|
||||
|
||||
/* how to get the thread information struct from ASM */
|
||||
#define GET_THREAD_INFO(reg) \
|
||||
movl $-THREAD_SIZE, reg; \
|
||||
andl %esp, reg
|
||||
|
||||
/* use this one if reg already contains %esp */
|
||||
#define GET_THREAD_INFO_WITH_ESP(reg) \
|
||||
andl $-THREAD_SIZE, reg
|
||||
|
||||
#endif
|
||||
|
||||
/*
|
||||
* thread information flags
|
||||
* - these are process state flags that various
|
||||
* assembly files may need to access
|
||||
* - pending work-to-be-done flags are in LSW
|
||||
* - other flags in MSW
|
||||
*/
|
||||
#define TIF_SYSCALL_TRACE 0 /* syscall trace active */
|
||||
#define TIF_SIGPENDING 1 /* signal pending */
|
||||
#define TIF_NEED_RESCHED 2 /* rescheduling necessary */
|
||||
#define TIF_SINGLESTEP 3 /* restore singlestep on return to
|
||||
user mode */
|
||||
#define TIF_IRET 4 /* return with iret */
|
||||
#define TIF_SYSCALL_EMU 5 /* syscall emulation active */
|
||||
#define TIF_SYSCALL_AUDIT 6 /* syscall auditing active */
|
||||
#define TIF_SECCOMP 7 /* secure computing */
|
||||
#define TIF_RESTORE_SIGMASK 8 /* restore signal mask in do_signal() */
|
||||
#define TIF_HRTICK_RESCHED 9 /* reprogram hrtick timer */
|
||||
#define TIF_MEMDIE 16
|
||||
#define TIF_DEBUG 17 /* uses debug registers */
|
||||
#define TIF_IO_BITMAP 18 /* uses I/O bitmap */
|
||||
#define TIF_FREEZE 19 /* is freezing for suspend */
|
||||
#define TIF_NOTSC 20 /* TSC is not accessible in userland */
|
||||
#define TIF_FORCED_TF 21 /* true if TF in eflags artificially */
|
||||
#define TIF_DEBUGCTLMSR 22 /* uses thread_struct.debugctlmsr */
|
||||
#define TIF_DS_AREA_MSR 23 /* uses thread_struct.ds_area_msr */
|
||||
#define TIF_BTS_TRACE_TS 24 /* record scheduling event timestamps */
|
||||
|
||||
#define _TIF_SYSCALL_TRACE (1 << TIF_SYSCALL_TRACE)
|
||||
#define _TIF_SIGPENDING (1 << TIF_SIGPENDING)
|
||||
#define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED)
|
||||
#define _TIF_SINGLESTEP (1 << TIF_SINGLESTEP)
|
||||
#define _TIF_IRET (1 << TIF_IRET)
|
||||
#define _TIF_SYSCALL_EMU (1 << TIF_SYSCALL_EMU)
|
||||
#define _TIF_SYSCALL_AUDIT (1 << TIF_SYSCALL_AUDIT)
|
||||
#define _TIF_SECCOMP (1 << TIF_SECCOMP)
|
||||
#define _TIF_RESTORE_SIGMASK (1 << TIF_RESTORE_SIGMASK)
|
||||
#define _TIF_HRTICK_RESCHED (1 << TIF_HRTICK_RESCHED)
|
||||
#define _TIF_DEBUG (1 << TIF_DEBUG)
|
||||
#define _TIF_IO_BITMAP (1 << TIF_IO_BITMAP)
|
||||
#define _TIF_FREEZE (1 << TIF_FREEZE)
|
||||
#define _TIF_NOTSC (1 << TIF_NOTSC)
|
||||
#define _TIF_FORCED_TF (1 << TIF_FORCED_TF)
|
||||
#define _TIF_DEBUGCTLMSR (1 << TIF_DEBUGCTLMSR)
|
||||
#define _TIF_DS_AREA_MSR (1 << TIF_DS_AREA_MSR)
|
||||
#define _TIF_BTS_TRACE_TS (1 << TIF_BTS_TRACE_TS)
|
||||
|
||||
/* work to do on interrupt/exception return */
|
||||
#define _TIF_WORK_MASK \
|
||||
(0x0000FFFF & ~(_TIF_SYSCALL_TRACE | _TIF_SYSCALL_AUDIT | \
|
||||
_TIF_SECCOMP | _TIF_SYSCALL_EMU))
|
||||
/* work to do on any return to u-space */
|
||||
#define _TIF_ALLWORK_MASK (0x0000FFFF & ~_TIF_SECCOMP)
|
||||
|
||||
/* flags to check in __switch_to() */
|
||||
#define _TIF_WORK_CTXSW \
|
||||
(_TIF_IO_BITMAP | _TIF_NOTSC | _TIF_DEBUGCTLMSR | \
|
||||
_TIF_DS_AREA_MSR | _TIF_BTS_TRACE_TS)
|
||||
#define _TIF_WORK_CTXSW_PREV _TIF_WORK_CTXSW
|
||||
#define _TIF_WORK_CTXSW_NEXT (_TIF_WORK_CTXSW | _TIF_DEBUG)
|
||||
|
||||
|
||||
/*
|
||||
* Thread-synchronous status.
|
||||
*
|
||||
* This is different from the flags in that nobody else
|
||||
* ever touches our thread-synchronous status, so we don't
|
||||
* have to worry about atomic accesses.
|
||||
*/
|
||||
#define TS_USEDFPU 0x0001 /* FPU was used by this task
|
||||
this quantum (SMP) */
|
||||
#define TS_POLLING 0x0002 /* True if in idle loop
|
||||
and not sleeping */
|
||||
|
||||
#define tsk_is_polling(t) (task_thread_info(t)->status & TS_POLLING)
|
||||
|
||||
#endif /* __KERNEL__ */
|
||||
|
||||
#endif /* _ASM_THREAD_INFO_H */
|
||||
@ -1,186 +0,0 @@
|
||||
/* thread_info.h: x86_64 low-level thread information
|
||||
*
|
||||
* Copyright (C) 2002 David Howells (dhowells@redhat.com)
|
||||
* - Incorporating suggestions made by Linus Torvalds and Dave Miller
|
||||
*/
|
||||
|
||||
#ifndef _ASM_THREAD_INFO_H
|
||||
#define _ASM_THREAD_INFO_H
|
||||
|
||||
#ifdef __KERNEL__
|
||||
|
||||
#include <asm/page.h>
|
||||
#include <asm/types.h>
|
||||
#include <asm/pda.h>
|
||||
|
||||
/*
|
||||
* low level task data that entry.S needs immediate access to
|
||||
* - this struct should fit entirely inside of one cache line
|
||||
* - this struct shares the supervisor stack pages
|
||||
*/
|
||||
#ifndef __ASSEMBLY__
|
||||
struct task_struct;
|
||||
struct exec_domain;
|
||||
#include <asm/processor.h>
|
||||
|
||||
struct thread_info {
|
||||
struct task_struct *task; /* main task structure */
|
||||
struct exec_domain *exec_domain; /* execution domain */
|
||||
__u32 flags; /* low level flags */
|
||||
__u32 status; /* thread synchronous flags */
|
||||
__u32 cpu; /* current CPU */
|
||||
int preempt_count; /* 0 => preemptable,
|
||||
<0 => BUG */
|
||||
mm_segment_t addr_limit;
|
||||
struct restart_block restart_block;
|
||||
#ifdef CONFIG_IA32_EMULATION
|
||||
void __user *sysenter_return;
|
||||
#endif
|
||||
};
|
||||
#endif
|
||||
|
||||
/*
|
||||
* macros/functions for gaining access to the thread information structure
|
||||
* preempt_count needs to be 1 initially, until the scheduler is functional.
|
||||
*/
|
||||
#ifndef __ASSEMBLY__
|
||||
#define INIT_THREAD_INFO(tsk) \
|
||||
{ \
|
||||
.task = &tsk, \
|
||||
.exec_domain = &default_exec_domain, \
|
||||
.flags = 0, \
|
||||
.cpu = 0, \
|
||||
.preempt_count = 1, \
|
||||
.addr_limit = KERNEL_DS, \
|
||||
.restart_block = { \
|
||||
.fn = do_no_restart_syscall, \
|
||||
}, \
|
||||
}
|
||||
|
||||
#define init_thread_info (init_thread_union.thread_info)
|
||||
#define init_stack (init_thread_union.stack)
|
||||
|
||||
static inline struct thread_info *current_thread_info(void)
|
||||
{
|
||||
struct thread_info *ti;
|
||||
ti = (void *)(read_pda(kernelstack) + PDA_STACKOFFSET - THREAD_SIZE);
|
||||
return ti;
|
||||
}
|
||||
|
||||
/* do not use in interrupt context */
|
||||
static inline struct thread_info *stack_thread_info(void)
|
||||
{
|
||||
struct thread_info *ti;
|
||||
asm("andq %%rsp,%0; " : "=r" (ti) : "0" (~(THREAD_SIZE - 1)));
|
||||
return ti;
|
||||
}
|
||||
|
||||
/* thread information allocation */
|
||||
#ifdef CONFIG_DEBUG_STACK_USAGE
|
||||
#define THREAD_FLAGS (GFP_KERNEL | __GFP_ZERO)
|
||||
#else
|
||||
#define THREAD_FLAGS GFP_KERNEL
|
||||
#endif
|
||||
|
||||
#define alloc_thread_info(tsk) \
|
||||
((struct thread_info *)__get_free_pages(THREAD_FLAGS, THREAD_ORDER))
|
||||
|
||||
#else /* !__ASSEMBLY__ */
|
||||
|
||||
/* how to get the thread information struct from ASM */
|
||||
#define GET_THREAD_INFO(reg) \
|
||||
movq %gs:pda_kernelstack,reg ; \
|
||||
subq $(THREAD_SIZE-PDA_STACKOFFSET),reg
|
||||
|
||||
#endif
|
||||
|
||||
/*
|
||||
* thread information flags
|
||||
* - these are process state flags that various assembly files
|
||||
* may need to access
|
||||
* - pending work-to-be-done flags are in LSW
|
||||
* - other flags in MSW
|
||||
* Warning: layout of LSW is hardcoded in entry.S
|
||||
*/
|
||||
#define TIF_SYSCALL_TRACE 0 /* syscall trace active */
|
||||
#define TIF_SIGPENDING 2 /* signal pending */
|
||||
#define TIF_NEED_RESCHED 3 /* rescheduling necessary */
|
||||
#define TIF_SINGLESTEP 4 /* reenable singlestep on user return*/
|
||||
#define TIF_IRET 5 /* force IRET */
|
||||
#define TIF_SYSCALL_AUDIT 7 /* syscall auditing active */
|
||||
#define TIF_SECCOMP 8 /* secure computing */
|
||||
#define TIF_RESTORE_SIGMASK 9 /* restore signal mask in do_signal */
|
||||
#define TIF_MCE_NOTIFY 10 /* notify userspace of an MCE */
|
||||
#define TIF_HRTICK_RESCHED 11 /* reprogram hrtick timer */
|
||||
/* 16 free */
|
||||
#define TIF_IA32 17 /* 32bit process */
|
||||
#define TIF_FORK 18 /* ret_from_fork */
|
||||
#define TIF_ABI_PENDING 19
|
||||
#define TIF_MEMDIE 20
|
||||
#define TIF_DEBUG 21 /* uses debug registers */
|
||||
#define TIF_IO_BITMAP 22 /* uses I/O bitmap */
|
||||
#define TIF_FREEZE 23 /* is freezing for suspend */
|
||||
#define TIF_FORCED_TF 24 /* true if TF in eflags artificially */
|
||||
#define TIF_DEBUGCTLMSR 25 /* uses thread_struct.debugctlmsr */
|
||||
#define TIF_DS_AREA_MSR 26 /* uses thread_struct.ds_area_msr */
|
||||
#define TIF_BTS_TRACE_TS 27 /* record scheduling event timestamps */
|
||||
#define TIF_NOTSC 28 /* TSC is not accessible in userland */
|
||||
|
||||
#define _TIF_SYSCALL_TRACE (1 << TIF_SYSCALL_TRACE)
|
||||
#define _TIF_SIGPENDING (1 << TIF_SIGPENDING)
|
||||
#define _TIF_SINGLESTEP (1 << TIF_SINGLESTEP)
|
||||
#define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED)
|
||||
#define _TIF_IRET (1 << TIF_IRET)
|
||||
#define _TIF_SYSCALL_AUDIT (1 << TIF_SYSCALL_AUDIT)
|
||||
#define _TIF_SECCOMP (1 << TIF_SECCOMP)
|
||||
#define _TIF_RESTORE_SIGMASK (1 << TIF_RESTORE_SIGMASK)
|
||||
#define _TIF_MCE_NOTIFY (1 << TIF_MCE_NOTIFY)
|
||||
#define _TIF_HRTICK_RESCHED (1 << TIF_HRTICK_RESCHED)
|
||||
#define _TIF_IA32 (1 << TIF_IA32)
|
||||
#define _TIF_FORK (1 << TIF_FORK)
|
||||
#define _TIF_ABI_PENDING (1 << TIF_ABI_PENDING)
|
||||
#define _TIF_DEBUG (1 << TIF_DEBUG)
|
||||
#define _TIF_IO_BITMAP (1 << TIF_IO_BITMAP)
|
||||
#define _TIF_FREEZE (1 << TIF_FREEZE)
|
||||
#define _TIF_FORCED_TF (1 << TIF_FORCED_TF)
|
||||
#define _TIF_DEBUGCTLMSR (1 << TIF_DEBUGCTLMSR)
|
||||
#define _TIF_DS_AREA_MSR (1 << TIF_DS_AREA_MSR)
|
||||
#define _TIF_BTS_TRACE_TS (1 << TIF_BTS_TRACE_TS)
|
||||
#define _TIF_NOTSC (1 << TIF_NOTSC)
|
||||
|
||||
/* work to do on interrupt/exception return */
|
||||
#define _TIF_WORK_MASK \
|
||||
(0x0000FFFF & \
|
||||
~(_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT|_TIF_SINGLESTEP|_TIF_SECCOMP))
|
||||
/* work to do on any return to user space */
|
||||
#define _TIF_ALLWORK_MASK (0x0000FFFF & ~_TIF_SECCOMP)
|
||||
|
||||
#define _TIF_DO_NOTIFY_MASK \
|
||||
(_TIF_SIGPENDING|_TIF_SINGLESTEP|_TIF_MCE_NOTIFY|_TIF_HRTICK_RESCHED)
|
||||
|
||||
/* flags to check in __switch_to() */
|
||||
#define _TIF_WORK_CTXSW \
|
||||
(_TIF_IO_BITMAP|_TIF_DEBUGCTLMSR|_TIF_DS_AREA_MSR|_TIF_BTS_TRACE_TS|_TIF_NOTSC)
|
||||
#define _TIF_WORK_CTXSW_PREV _TIF_WORK_CTXSW
|
||||
#define _TIF_WORK_CTXSW_NEXT (_TIF_WORK_CTXSW|_TIF_DEBUG)
|
||||
|
||||
#define PREEMPT_ACTIVE 0x10000000
|
||||
|
||||
/*
|
||||
* Thread-synchronous status.
|
||||
*
|
||||
* This is different from the flags in that nobody else
|
||||
* ever touches our thread-synchronous status, so we don't
|
||||
* have to worry about atomic accesses.
|
||||
*/
|
||||
#define TS_USEDFPU 0x0001 /* FPU was used by this task
|
||||
this quantum (SMP) */
|
||||
#define TS_COMPAT 0x0002 /* 32bit syscall active */
|
||||
#define TS_POLLING 0x0004 /* true if in idle loop
|
||||
and not sleeping */
|
||||
|
||||
#define tsk_is_polling(t) (task_thread_info(t)->status & TS_POLLING)
|
||||
|
||||
#endif /* __KERNEL__ */
|
||||
|
||||
#endif /* _ASM_THREAD_INFO_H */
|
||||
Loading…
Reference in New Issue
Block a user