arch/x86/kernel/irq_work.c

   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
  12 static inline void irq_work_entering_irq(void)
  13 {
  14         irq_enter();
  15         ack_APIC_irq();
  16 }
  17
  18 static inline void __smp_irq_work_interrupt(void)
  19 {
  20         inc_irq_stat(apic_irq_work_irqs);
  21         irq_work_run();
  22 }
  23
  24 void smp_irq_work_interrupt(struct pt_regs *regs)
  25 {
  26         irq_work_entering_irq();
  27         __smp_irq_work_interrupt();
  28         exiting_irq();
  29 }
  30
  31 void arch_irq_work_raise(void)
  32 {
  33 #ifdef CONFIG_X86_LOCAL_APIC
  34         if (!cpu_has_apic)
  35                 return;
  36
  37         apic->send_IPI_self(IRQ_WORK_VECTOR);
  38         apic_wait_icr_idle();
  39 #endif
  40 }