1/*
 2 * x86 specific code for irq_work
 3 *
 4 * Copyright (C) 2010 Red Hat, Inc., Peter Zijlstra <pzijlstr@redhat.com>
 5 */
 6
 7#include <linux/kernel.h>
 8#include <linux/irq_work.h>
 9#include <linux/hardirq.h>
10#include <asm/apic.h>
11#include <asm/trace/irq_vectors.h>
12
13static inline void irq_work_entering_irq(void)
14{
15	irq_enter();
16	ack_APIC_irq();
17}
18
19static inline void __smp_irq_work_interrupt(void)
20{
21	inc_irq_stat(apic_irq_work_irqs);
22	irq_work_run();
23}
24
25__visible void smp_irq_work_interrupt(struct pt_regs *regs)
26{
27	irq_work_entering_irq();
28	__smp_irq_work_interrupt();
29	exiting_irq();
30}
31
32__visible void smp_trace_irq_work_interrupt(struct pt_regs *regs)
33{
34	irq_work_entering_irq();
35	trace_irq_work_entry(IRQ_WORK_VECTOR);
36	__smp_irq_work_interrupt();
37	trace_irq_work_exit(IRQ_WORK_VECTOR);
38	exiting_irq();
39}
40
41void arch_irq_work_raise(void)
42{
43#ifdef CONFIG_X86_LOCAL_APIC
44	if (!cpu_has_apic)
45		return;
46
47	apic->send_IPI_self(IRQ_WORK_VECTOR);
48	apic_wait_icr_idle();
49#endif
50}

 1/*
 2 * x86 specific code for irq_work
 3 *
 4 * Copyright (C) 2010 Red Hat, Inc., Peter Zijlstra
 5 */
 6
 7#include <linux/kernel.h>
 8#include <linux/irq_work.h>
 9#include <linux/hardirq.h>
10#include <asm/apic.h>
11#include <asm/trace/irq_vectors.h>
12
 
 
 
 
 
 
13static inline void __smp_irq_work_interrupt(void)
14{
15	inc_irq_stat(apic_irq_work_irqs);
16	irq_work_run();
17}
18
19__visible void smp_irq_work_interrupt(struct pt_regs *regs)
20{
21	ipi_entering_ack_irq();
22	__smp_irq_work_interrupt();
23	exiting_irq();
24}
25
26__visible void smp_trace_irq_work_interrupt(struct pt_regs *regs)
27{
28	ipi_entering_ack_irq();
29	trace_irq_work_entry(IRQ_WORK_VECTOR);
30	__smp_irq_work_interrupt();
31	trace_irq_work_exit(IRQ_WORK_VECTOR);
32	exiting_irq();
33}
34
35void arch_irq_work_raise(void)
36{
37#ifdef CONFIG_X86_LOCAL_APIC
38	if (!arch_irq_work_has_interrupt())
39		return;
40
41	apic->send_IPI_self(IRQ_WORK_VECTOR);
42	apic_wait_icr_idle();
43#endif
44}