Commit-ID: 9d87cd61a6b71ee00b7576a3ebc10208becdbea1
Gitweb: http://git.kernel.org/tip/9d87cd61a6b71ee00b7576a3ebc10208becdbea1
Author: Vitaly Kuznetsov <vkuznets@xxxxxxxxxx>
AuthorDate: Tue, 7 Jul 2015 18:26:13 +0200
Committer: Ingo Molnar <mingo@xxxxxxxxxx>
CommitDate: Wed, 8 Jul 2015 11:18:34 +0200
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@xxxxxxxxxx>
Signed-off-by: Vitaly Kuznetsov <vkuznets@xxxxxxxxxx>
Cc: Andrew Jones <drjones@xxxxxxxxxx>
Cc: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Link: http://lkml.kernel.org/r/1436286373-11908-1-git-send-email-vkuznets@xxxxxxxxxx
Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx>
---
arch/x86/kernel/irq.c | 11 +++++++----
1 file changed, 7 insertions(+), 4 deletions(-)
diff --git a/arch/x86/kernel/irq.c b/arch/x86/kernel/irq.c
index 88b36648..5b53747 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)
--
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