diff options
Diffstat (limited to 'arch/x86/kernel/irq_work.c')
-rw-r--r-- | arch/x86/kernel/irq_work.c | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/arch/x86/kernel/irq_work.c b/arch/x86/kernel/irq_work.c new file mode 100644 index 000000000..15d741ddf --- /dev/null +++ b/arch/x86/kernel/irq_work.c @@ -0,0 +1,50 @@ +/* + * x86 specific code for irq_work + * + * Copyright (C) 2010 Red Hat, Inc., Peter Zijlstra <pzijlstr@redhat.com> + */ + +#include <linux/kernel.h> +#include <linux/irq_work.h> +#include <linux/hardirq.h> +#include <asm/apic.h> +#include <asm/trace/irq_vectors.h> + +static inline void irq_work_entering_irq(void) +{ + irq_enter(); + ack_APIC_irq(); +} + +static inline void __smp_irq_work_interrupt(void) +{ + inc_irq_stat(apic_irq_work_irqs); + irq_work_run(); +} + +__visible void smp_irq_work_interrupt(struct pt_regs *regs) +{ + irq_work_entering_irq(); + __smp_irq_work_interrupt(); + exiting_irq(); +} + +__visible void smp_trace_irq_work_interrupt(struct pt_regs *regs) +{ + irq_work_entering_irq(); + trace_irq_work_entry(IRQ_WORK_VECTOR); + __smp_irq_work_interrupt(); + trace_irq_work_exit(IRQ_WORK_VECTOR); + exiting_irq(); +} + +void arch_irq_work_raise(void) +{ +#ifdef CONFIG_X86_LOCAL_APIC + if (!arch_irq_work_has_interrupt()) + return; + + apic->send_IPI_self(IRQ_WORK_VECTOR); + apic_wait_icr_idle(); +#endif +} |