x86/irq: Show statistics information for posted-interrupts

Show the statistics information for notification event
and wakeup event for posted-interrupt in /proc/interrupts.

[ tglx: Named the short identifiers PIN and PIW to match the long
  	identifiers ]

Signed-off-by: Feng Wu <feng.wu@intel.com>
Cc: jiang.liu@linux.intel.com
Link: http://lkml.kernel.org/r/1432026437-16560-5-git-send-email-feng.wu@intel.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

1 files changed, 12 insertions, 0 deletions

diff --git a/arch/x86/kernel/irq.c b/arch/x86/kernel/irq.c
index 90b2f7052f5b..7e10c8b4b318 100644
--- a/arch/x86/kernel/irq.c
+++ b/arch/x86/kernel/irq.c
@@ -142,6 +142,18 @@ int arch_show_interrupts(struct seq_file *p, int prec)
 #if defined(CONFIG_X86_IO_APIC)
         seq_printf(p, "%*s: %10u\n", prec, "MIS", atomic_read(&irq_mis_count));
 #endif
+#ifdef CONFIG_HAVE_KVM
+        seq_printf(p, "%*s: ", prec, "PIN");
+        for_each_online_cpu(j)
+                seq_printf(p, "%10u ", irq_stats(j)->kvm_posted_intr_ipis);
+        seq_puts(p, "  Posted-interrupt notification event\n");
+
+        seq_printf(p, "%*s: ", prec, "PIW");
+        for_each_online_cpu(j)
+                seq_printf(p, "%10u ",
+                           irq_stats(j)->kvm_posted_intr_wakeup_ipis);
+        seq_puts(p, "  Posted-interrupt wakeup event\n");
+#endif
         return 0;
 }