arch/x86/kernel/irq_work.c

Source file repositories/reference/linux-study-clean/arch/x86/kernel/irq_work.c

File Facts

System
Linux kernel
Corpus path
arch/x86/kernel/irq_work.c
Extension
.c
Size
688 bytes
Lines
35
Domain
Architecture Layer
Bucket
arch/x86
Inferred role
Architecture Layer: implementation source
Status
source implementation candidate

Why This File Exists

CPU and platform-specific kernel glue: boot entry, traps, syscall entry, interrupts, page tables, context switch, and low-level barriers.

Dependency Surface

Detected Declarations

Annotated Snippet

// SPDX-License-Identifier: GPL-2.0
/*
 * x86 specific code for irq_work
 *
 * Copyright (C) 2010 Red Hat, Inc., Peter Zijlstra
 */

#include <linux/kernel.h>
#include <linux/irq_work.h>
#include <linux/hardirq.h>
#include <asm/apic.h>
#include <asm/idtentry.h>
#include <asm/trace/irq_vectors.h>
#include <linux/interrupt.h>

#ifdef CONFIG_X86_LOCAL_APIC
DEFINE_IDTENTRY_SYSVEC(sysvec_irq_work)
{
	apic_eoi();
	trace_irq_work_entry(IRQ_WORK_VECTOR);
	inc_irq_stat(IRQ_WORK);
	irq_work_run();
	trace_irq_work_exit(IRQ_WORK_VECTOR);
}

void arch_irq_work_raise(void)
{
	if (!arch_irq_work_has_interrupt())
		return;

	__apic_send_IPI_self(IRQ_WORK_VECTOR);
	apic_wait_icr_idle();
}
#endif

Annotation

Implementation Notes