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 } 46