arch/x86/kernel/irq_work.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * x86 specific code for irq_work
   4  *
   5  * Copyright (C) 2010 Red Hat, Inc., Peter Zijlstra
   6  */
   7
   8 #include <linux/kernel.h>
   9 #include <linux/irq_work.h>
  10 #include <linux/hardirq.h>
  11 #include <asm/apic.h>
  12 #include <asm/trace/irq_vectors.h>
  13 #include <linux/interrupt.h>
  14
  15 #ifdef CONFIG_X86_LOCAL_APIC
  16 __visible void __irq_entry smp_irq_work_interrupt(struct pt_regs *regs)
  17 {
  18         ipi_entering_ack_irq();
  19         trace_irq_work_entry(IRQ_WORK_VECTOR);
  20         inc_irq_stat(apic_irq_work_irqs);
  21         irq_work_run();
  22         trace_irq_work_exit(IRQ_WORK_VECTOR);
  23         exiting_irq();
  24 }
  25
  26 void arch_irq_work_raise(void)
  27 {
  28         if (!arch_irq_work_has_interrupt())
  29                 return;
  30
  31         apic->send_IPI_self(IRQ_WORK_VECTOR);
  32         apic_wait_icr_idle();
  33 }
  34 #endif