Commit-ID: 51d4e5daa32808df4d50db511d167fde19fa114e Gitweb: https://git.kernel.org/tip/51d4e5daa32808df4d50db511d167fde19fa114e Author: Vitaly Kuznetsov <vkuzn...@redhat.com> AuthorDate: Wed, 24 Jan 2018 14:23:35 +0100 Committer: Thomas Gleixner <t...@linutronix.de> CommitDate: Tue, 30 Jan 2018 23:55:33 +0100
x86/irq: Count Hyper-V reenlightenment interrupts 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 <vkuzn...@redhat.com> Signed-off-by: Thomas Gleixner <t...@linutronix.de> Reviewed-by: Thomas Gleixner <t...@linutronix.de> Cc: Stephen Hemminger <sthem...@microsoft.com> Cc: k...@vger.kernel.org Cc: Radim Krčmář <rkrc...@redhat.com> Cc: Haiyang Zhang <haiya...@microsoft.com> Cc: "Michael Kelley (EOSG)" <michael.h.kel...@microsoft.com> Cc: Roman Kagan <rka...@virtuozzo.com> Cc: Andy Lutomirski <l...@kernel.org> Cc: de...@linuxdriverproject.org Cc: Paolo Bonzini <pbonz...@redhat.com> Cc: "K. Y. Srinivasan" <k...@microsoft.com> Cc: Cathy Avery <cav...@redhat.com> Cc: Mohammed Gamal <mmo...@redhat.com> Link: https://lkml.kernel.org/r/20180124132337.30138-6-vkuzn...@redhat.com --- arch/x86/hyperv/hv_init.c | 2 ++ arch/x86/include/asm/hardirq.h | 3 +++ arch/x86/kernel/irq.c | 9 +++++++++ 3 files changed, 14 insertions(+) diff --git a/arch/x86/hyperv/hv_init.c b/arch/x86/hyperv/hv_init.c index e4377e2..a3adece 100644 --- a/arch/x86/hyperv/hv_init.c +++ b/arch/x86/hyperv/hv_init.c @@ -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(); diff --git a/arch/x86/include/asm/hardirq.h b/arch/x86/include/asm/hardirq.h index 51cc979..7c341a7 100644 --- a/arch/x86/include/asm/hardirq.h +++ b/arch/x86/include/asm/hardirq.h @@ -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); diff --git a/arch/x86/kernel/irq.c b/arch/x86/kernel/irq.c index 68e1867..45fb4d2 100644 --- a/arch/x86/kernel/irq.c +++ b/arch/x86/kernel/irq.c @@ -142,6 +142,15 @@ int arch_show_interrupts(struct seq_file *p, int prec) 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) seq_printf(p, "%*s: %10u\n", prec, "MIS", atomic_read(&irq_mis_count));
