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daabb8eb9a
Two NOP5s are a reasonable tradeoff to avoid duplicated code and the requirement to switch the IDT. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Steven Rostedt <rostedt@goodmis.org> Link: http://lkml.kernel.org/r/20170828064957.064746737@linutronix.de Signed-off-by: Ingo Molnar <mingo@kernel.org>
33 lines
695 B
C
33 lines
695 B
C
/*
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* x86 specific code for irq_work
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*
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* Copyright (C) 2010 Red Hat, Inc., Peter Zijlstra
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*/
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#include <linux/kernel.h>
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#include <linux/irq_work.h>
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#include <linux/hardirq.h>
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#include <asm/apic.h>
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#include <asm/trace/irq_vectors.h>
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#include <linux/interrupt.h>
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__visible void __irq_entry smp_irq_work_interrupt(struct pt_regs *regs)
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{
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ipi_entering_ack_irq();
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trace_irq_work_entry(IRQ_WORK_VECTOR);
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inc_irq_stat(apic_irq_work_irqs);
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irq_work_run();
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trace_irq_work_exit(IRQ_WORK_VECTOR);
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exiting_irq();
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}
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void arch_irq_work_raise(void)
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{
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#ifdef CONFIG_X86_LOCAL_APIC
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if (!arch_irq_work_has_interrupt())
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return;
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apic->send_IPI_self(IRQ_WORK_VECTOR);
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apic_wait_icr_idle();
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#endif
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}
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