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 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 } 45