Drivers: hv: vmbus: Expose per-channel interrupts and events counters

When investigating performance, it is useful to be able to look at
the number of host and guest events per-channel. This is equivalent
to per-device interrupt statistics.

Signed-off-by: Stephen Hemminger <sthemmin@microsoft.com>
Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 4 insertions, 0 deletions

diff --git a/include/linux/hyperv.h b/include/linux/hyperv.h
index ea6b5586ad77..f3e97c5f94c9 100644
--- a/include/linux/hyperv.h
+++ b/include/linux/hyperv.h
@@ -719,6 +719,10 @@ struct vmbus_channel {
 
         struct vmbus_close_msg close_msg;
 
+        /* Statistics */
+        u64     interrupts;     /* Host to Guest interrupts */
+        u64     sig_events;     /* Guest to Host events */
+
         /* Channel callback's invoked in softirq context */
         struct tasklet_struct callback_event;
         void (*onchannel_callback)(void *context);