arch/x86/kernel/irq_work.c

   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 #include <linux/interrupt.h>
  13
  14 static inline void __smp_irq_work_interrupt(void)
  15 {
  16         inc_irq_stat(apic_irq_work_irqs);
  17         irq_work_run();
  18 }
  19
  20 __visible void __irq_entry smp_irq_work_interrupt(struct pt_regs *regs)
  21 {
  22         ipi_entering_ack_irq();
  23         __smp_irq_work_interrupt();
  24         exiting_irq();
  25 }
  26
  27 __visible void __irq_entry smp_trace_irq_work_interrupt(struct pt_regs *regs)
  28 {
  29         ipi_entering_ack_irq();
  30         trace_irq_work_entry(IRQ_WORK_VECTOR);
  31         __smp_irq_work_interrupt();
  32         trace_irq_work_exit(IRQ_WORK_VECTOR);
  33         exiting_irq();
  34 }
  35
  36 void arch_irq_work_raise(void)
  37 {
  38 #ifdef CONFIG_X86_LOCAL_APIC
  39         if (!arch_irq_work_has_interrupt())
  40                 return;
  41
  42         apic->send_IPI_self(IRQ_WORK_VECTOR);
  43         apic_wait_icr_idle();
  44 #endif
  45 }