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 #include <asm/trace/irq_vectors.h>
  12
  13 static 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
  35 void 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 }