LXR linux/arch/x86/kernel/irq

   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 (!arch_irq_work_has_interrupt())
  45                return;
  46
  47        apic->send_IPI_self(IRQ_WORK_VECTOR);
  48        apic_wait_icr_idle();
  49#endif
  50}
  51