x86/irq: Count Hyper-V reenlightenment interrupts (51d4e5da) · Commits · 戴 / test

Hyper-V reenlightenment interrupts arrive when the VM is migrated, While they are not interesting in general it's important when L2 nested guests are running. Signed-off-by:

Vitaly Kuznetsov <vkuznets@redhat.com> Signed-off-by:

Thomas Gleixner <tglx@linutronix.de> Reviewed-by:

Thomas Gleixner <tglx@linutronix.de> Cc: Stephen Hemminger <sthemmin@microsoft.com> Cc: kvm@vger.kernel.org Cc: Radim Krčmář <rkrcmar@redhat.com> Cc: Haiyang Zhang <haiyangz@microsoft.com> Cc: "Michael Kelley (EOSG)" <Michael.H.Kelley@microsoft.com> Cc: Roman Kagan <rkagan@virtuozzo.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: devel@linuxdriverproject.org Cc: Paolo Bonzini <pbonzini@redhat.com> Cc: "K. Y. Srinivasan" <kys@microsoft.com> Cc: Cathy Avery <cavery@redhat.com> Cc: Mohammed Gamal <mmorsy@redhat.com> Link: https://lkml.kernel.org/r/20180124132337.30138-6-vkuznets@redhat.com

arch/x86/hyperv/hv_init.c

+2 −0

Original line number	Diff line number	Diff line
		@@ -147,6 +147,8 @@ __visible void __irq_entry hyperv_reenlightenment_intr(struct pt_regs *regs)
		{
		entering_ack_irq();

		inc_irq_stat(irq_hv_reenlightenment_count);

		schedule_delayed_work(&hv_reenlightenment_work, HZ/10);

		exiting_irq();

arch/x86/include/asm/hardirq.h

+3 −0

Original line number	Diff line number	Diff line
		@@ -38,6 +38,9 @@ typedef struct {
		#if IS_ENABLED(CONFIG_HYPERV) \|\| defined(CONFIG_XEN)
		unsigned int irq_hv_callback_count;
		#endif
		#if IS_ENABLED(CONFIG_HYPERV)
		unsigned int irq_hv_reenlightenment_count;
		#endif
		} ____cacheline_aligned irq_cpustat_t;

		DECLARE_PER_CPU_SHARED_ALIGNED(irq_cpustat_t, irq_stat);

arch/x86/kernel/irq.c

+9 −0

Original line number	Diff line number	Diff line
		@@ -141,6 +141,15 @@ int arch_show_interrupts(struct seq_file *p, int prec)
		irq_stats(j)->irq_hv_callback_count);
		seq_puts(p, " Hypervisor callback interrupts\n");
		}
		#endif
		#if IS_ENABLED(CONFIG_HYPERV)
		if (test_bit(HYPERV_REENLIGHTENMENT_VECTOR, system_vectors)) {
		seq_printf(p, "%*s: ", prec, "HRE");
		for_each_online_cpu(j)
		seq_printf(p, "%10u ",
		irq_stats(j)->irq_hv_reenlightenment_count);
		seq_puts(p, " Hyper-V reenlightenment interrupts\n");
		}
		#endif
		seq_printf(p, "%*s: %10u\n", prec, "ERR", atomic_read(&irq_err_count));
		#if defined(CONFIG_X86_IO_APIC)

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