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authorVitaly Kuznetsov <vkuznets@redhat.com>2015-07-07 18:26:13 +0200
committerIngo Molnar <mingo@kernel.org>2015-07-08 11:18:34 +0200
commit9d87cd61a6b71ee00b7576a3ebc10208becdbea1 (patch)
tree04314fbe62c128bb6837088fe888b12517a80a43 /arch/x86/kernel/irq.c
parentd6ac4ffc61ace6ed6f183e9fd7f207c0ddafb897 (diff)
downloadlinux-9d87cd61a6b71ee00b7576a3ebc10208becdbea1.tar.bz2
x86/irq: Hide 'HYP:' line in /proc/interrupts when not on Xen/Hyper-V
Hypervisor callback interrupts are only accounted on Xen/Hyper-V. There is no point in having always-zero HYP: line on other hypervisors or bare metal. Print the line only if HYPERVISOR_CALLBACK_VECTOR was allocated. Reported-by: Radim Krčmář <rkrcmar@redhat.com> Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com> Cc: Andrew Jones <drjones@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/1436286373-11908-1-git-send-email-vkuznets@redhat.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/x86/kernel/irq.c')
-rw-r--r--arch/x86/kernel/irq.c11
1 files changed, 7 insertions, 4 deletions
diff --git a/arch/x86/kernel/irq.c b/arch/x86/kernel/irq.c
index 88b366487b0e..5b537479de83 100644
--- a/arch/x86/kernel/irq.c
+++ b/arch/x86/kernel/irq.c
@@ -139,10 +139,13 @@ int arch_show_interrupts(struct seq_file *p, int prec)
seq_puts(p, " Machine check polls\n");
#endif
#if IS_ENABLED(CONFIG_HYPERV) || defined(CONFIG_XEN)
- seq_printf(p, "%*s: ", prec, "HYP");
- for_each_online_cpu(j)
- seq_printf(p, "%10u ", irq_stats(j)->irq_hv_callback_count);
- seq_puts(p, " Hypervisor callback interrupts\n");
+ if (test_bit(HYPERVISOR_CALLBACK_VECTOR, used_vectors)) {
+ seq_printf(p, "%*s: ", prec, "HYP");
+ for_each_online_cpu(j)
+ seq_printf(p, "%10u ",
+ irq_stats(j)->irq_hv_callback_count);
+ seq_puts(p, " Hypervisor callback interrupts\n");
+ }
#endif
seq_printf(p, "%*s: %10u\n", prec, "ERR", atomic_read(&irq_err_count));
#if defined(CONFIG_X86_IO_APIC)