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authorAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-08-05 17:04:01 -0300
committerAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-08-05 17:04:01 -0300
commit57f0f512b273f60d52568b8c6b77e17f5636edc0 (patch)
tree5e910f0e82173f4ef4f51111366a3f1299037a7b /arch/x86/kernel/irq_work.c
Initial import
Diffstat (limited to 'arch/x86/kernel/irq_work.c')
-rw-r--r--arch/x86/kernel/irq_work.c50
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
+}