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 irq_work_entering_irq(void) 14 { 15 irq_enter(); 16 ack_APIC_irq(); 17 } 18 19 static inline void __smp_irq_work_interrupt(void) 20 { 21 inc_irq_stat(apic_irq_work_irqs); 22 irq_work_run(); 23 } 24 25 void smp_irq_work_interrupt(struct pt_regs *regs) 26 { 27 irq_work_entering_irq(); 28 __smp_irq_work_interrupt(); 29 exiting_irq(); 30 } 31 32 void smp_trace_irq_work_interrupt(struct pt_regs *regs) 33 { 34 irq_work_entering_irq(); 35 trace_irq_work_entry(IRQ_WORK_VECTOR); 36 __smp_irq_work_interrupt(); 37 trace_irq_work_exit(IRQ_WORK_VECTOR); 38 exiting_irq(); 39 } 40 41 void arch_irq_work_raise(void) 42 { 43 #ifdef CONFIG_X86_LOCAL_APIC 44 if (!cpu_has_apic) 45 return; 46 47 apic->send_IPI_self(IRQ_WORK_VECTOR); 48 apic_wait_icr_idle(); 49 #endif 50 } 51