Release 4.14 arch/x86/include/asm/irqflags.h

Directory: arch/x86/include/asm
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _X86_IRQFLAGS_H_

#define _X86_IRQFLAGS_H_

#include <asm/processor-flags.h>

#ifndef __ASSEMBLY__

/* Provide __cpuidle; we can't safely include <linux/cpu.h> */

#define __cpuidle __attribute__((__section__(".cpuidle.text")))

/*
 * Interrupt control:
 */



static inline unsigned long native_save_fl(void)
{
	unsigned long flags;

	/*
         * "=rm" is safe here, because "pop" adjusts the stack before
         * it evaluates its effective address -- this is part of the
         * documented behavior of the "pop" instruction.
         */
	asm volatile("# __raw_save_flags\n\t"
                     "pushf ; pop %0"
                     : "=rm" (flags)
                     : /* no input */
		     : "memory");

	return flags;
}

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Total 23 100.00% 3 100.00%



static inline void native_restore_fl(unsigned long flags)
{
	asm volatile("push %0 ; popf"
                     : /* no output */
		     :"g" (flags)
                     :"memory", "cc");
}

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Joe Perches 4 25.00% 1 50.00%
Total 16 100.00% 2 100.00%



static inline void native_irq_disable(void)
{
	asm volatile("cli": : :"memory");
}

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Total 12 100.00% 1 100.00%



static inline void native_irq_enable(void)
{
	asm volatile("sti": : :"memory");
}

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Total 12 100.00% 1 100.00%



static inline __cpuidle void native_safe_halt(void)
{
	asm volatile("sti; hlt": : :"memory");
}

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Chris Metcalf 1 7.69% 1 50.00%
Total 13 100.00% 2 100.00%



static inline __cpuidle void native_halt(void)
{
	asm volatile("hlt": : :"memory");
}

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Chris Metcalf 1 7.69% 1 50.00%
Total 13 100.00% 2 100.00%

#endif

#ifdef CONFIG_PARAVIRT
#include <asm/paravirt.h>
#else
#ifndef __ASSEMBLY__
#include <linux/types.h>



static inline notrace unsigned long arch_local_save_flags(void)
{
	return native_save_fl();
}

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David Howells 1 6.67% 1 33.33%
Steven Rostedt 1 6.67% 1 33.33%
Total 15 100.00% 3 100.00%



static inline notrace void arch_local_irq_restore(unsigned long flags)
{
	native_restore_fl(flags);
}

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Glauber de Oliveira Costa 15 88.24% 1 33.33%
David Howells 1 5.88% 1 33.33%
Steven Rostedt 1 5.88% 1 33.33%
Total 17 100.00% 3 100.00%



static inline notrace void arch_local_irq_disable(void)
{
	native_irq_disable();
}

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David Howells 1 7.69% 1 33.33%
Steven Rostedt 1 7.69% 1 33.33%
Total 13 100.00% 3 100.00%



static inline notrace void arch_local_irq_enable(void)
{
	native_irq_enable();
}

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David Howells 1 7.69% 1 33.33%
Steven Rostedt 1 7.69% 1 33.33%
Total 13 100.00% 3 100.00%

/*
 * Used in the idle loop; sti takes one instruction cycle
 * to complete:
 */


static inline __cpuidle void arch_safe_halt(void)
{
	native_safe_halt();
}

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Glauber de Oliveira Costa 11 84.62% 1 33.33%
David Howells 1 7.69% 1 33.33%
Chris Metcalf 1 7.69% 1 33.33%
Total 13 100.00% 3 100.00%

/*
 * Used when interrupts are already enabled or to
 * shutdown the processor:
 */


static inline __cpuidle void halt(void)
{
	native_halt();
}

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Chris Metcalf 1 7.69% 1 50.00%
Total 13 100.00% 2 100.00%

/*
 * For spinlocks, etc:
 */


static inline notrace unsigned long arch_local_irq_save(void)
{
	unsigned long flags = arch_local_save_flags();
	arch_local_irq_disable();
	return flags;
}
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David Howells 3 12.50% 1 33.33%
Steven Rostedt 1 4.17% 1 33.33%
Total 24 100.00% 3 100.00%

#else


#define ENABLE_INTERRUPTS(x)	sti

#define DISABLE_INTERRUPTS(x)	cli

#ifdef CONFIG_X86_64

#define SWAPGS	swapgs
/*
 * Currently paravirt can't handle swapgs nicely when we
 * don't have a stack we can rely on (such as a user space
 * stack).  So we either find a way around these or just fault
 * and emulate if a guest tries to call swapgs directly.
 *
 * Either way, this is a good way to document that we don't
 * have a reliable stack. x86_64 only.
 */

#define SWAPGS_UNSAFE_STACK	swapgs


#define PARAVIRT_ADJUST_EXCEPTION_FRAME	
/*  */


#define INTERRUPT_RETURN	jmp native_iret

#define USERGS_SYSRET64				\
	swapgs;                                 \
        sysretq;

#define USERGS_SYSRET32				\
	swapgs;                                 \
        sysretl

#else

#define INTERRUPT_RETURN		iret

#define ENABLE_INTERRUPTS_SYSEXIT	sti; sysexit

#define GET_CR0_INTO_EAX		movl %cr0, %eax
#endif


#endif /* __ASSEMBLY__ */
#endif /* CONFIG_PARAVIRT */

#ifndef __ASSEMBLY__


static inline int arch_irqs_disabled_flags(unsigned long flags)
{
	return !(flags & X86_EFLAGS_IF);
}

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David Howells 1 5.26% 1 50.00%
Total 19 100.00% 2 100.00%



static inline int arch_irqs_disabled(void)
{
	unsigned long flags = arch_local_save_flags();

	return arch_irqs_disabled_flags(flags);
}
Contributors
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Glauber de Oliveira Costa 19 86.36% 1 50.00%
David Howells 3 13.64% 1 50.00%
Total 22 100.00% 2 100.00%

#endif /* !__ASSEMBLY__ */

#ifdef __ASSEMBLY__
#ifdef CONFIG_TRACE_IRQFLAGS

#  define TRACE_IRQS_ON		call trace_hardirqs_on_thunk;

#  define TRACE_IRQS_OFF	call trace_hardirqs_off_thunk;
#else

#  define TRACE_IRQS_ON

#  define TRACE_IRQS_OFF
#endif
#ifdef CONFIG_DEBUG_LOCK_ALLOC
#  ifdef CONFIG_X86_64

#    define LOCKDEP_SYS_EXIT		call lockdep_sys_exit_thunk

#    define LOCKDEP_SYS_EXIT_IRQ \
	TRACE_IRQS_ON; \
        sti; \
        call lockdep_sys_exit_thunk; \
        cli; \
        TRACE_IRQS_OFF;
#  else

#    define LOCKDEP_SYS_EXIT \
	pushl %eax;                             \
        pushl %ecx;                             \
        pushl %edx;                             \
        call lockdep_sys_exit;                  \
        popl %edx;                              \
        popl %ecx;                              \
        popl %eax;

#    define LOCKDEP_SYS_EXIT_IRQ
#  endif
#else

#  define LOCKDEP_SYS_EXIT

#  define LOCKDEP_SYS_EXIT_IRQ
#endif
#endif /* __ASSEMBLY__ */

#endif
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Glauber de Oliveira Costa 321 77.16% 1 6.25%
Denys Vlasenko 26 6.25% 3 18.75%
Jeremy Fitzhardinge 21 5.05% 4 25.00%
David Howells 12 2.88% 1 6.25%
Chris Metcalf 9 2.16% 1 6.25%
Thomas Gleixner 8 1.92% 1 6.25%
Steven Rostedt 8 1.92% 1 6.25%
Joe Perches 7 1.68% 1 6.25%
H. Peter Anvin 2 0.48% 1 6.25%
Andrew Lutomirski 1 0.24% 1 6.25%
Greg Kroah-Hartman 1 0.24% 1 6.25%
Total 416 100.00% 16 100.00%
Directory: arch/x86/include/asm

Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.
Created with cregit.
Person	Tokens	Prop	Commits	CommitProp
Glauber de Oliveira Costa	18	78.26%	1	33.33%
Joe Perches	3	13.04%	1	33.33%
H. Peter Anvin	2	8.70%	1	33.33%
Total	23	100.00%	3	100.00%
cregit-Linux how code gets into the kernel

Release 4.14 arch/x86/include/asm/irqflags.h

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