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authorMartin Schwidefsky <schwidefsky@de.ibm.com>2015-08-20 17:28:44 +0200
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2015-10-14 14:32:06 +0200
commit1ec2772e0c3ca3159035c03165355e355efc326b (patch)
tree469be3ba9032d367e4a796d6a31b25ccaab0d06a /drivers/s390/virtio
parents390/bitops: implement cache friendly test_and_set_bit_lock (diff)
downloadlinux-dev-1ec2772e0c3ca3159035c03165355e355efc326b.tar.xz
linux-dev-1ec2772e0c3ca3159035c03165355e355efc326b.zip
s390/diag: add a statistic for diagnose calls
Introduce /sys/debug/kernel/diag_stat with a statistic how many diagnose calls have been done by each CPU in the system. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'drivers/s390/virtio')
-rw-r--r--drivers/s390/virtio/virtio_ccw.c15
1 files changed, 12 insertions, 3 deletions
diff --git a/drivers/s390/virtio/virtio_ccw.c b/drivers/s390/virtio/virtio_ccw.c
index e9fae30fafda..b2a1a81e6fc8 100644
--- a/drivers/s390/virtio/virtio_ccw.c
+++ b/drivers/s390/virtio/virtio_ccw.c
@@ -28,6 +28,7 @@
#include <linux/io.h>
#include <linux/kvm_para.h>
#include <linux/notifier.h>
+#include <asm/diag.h>
#include <asm/setup.h>
#include <asm/irq.h>
#include <asm/cio.h>
@@ -366,9 +367,9 @@ static void virtio_ccw_drop_indicator(struct virtio_ccw_device *vcdev,
kfree(thinint_area);
}
-static inline long do_kvm_notify(struct subchannel_id schid,
- unsigned long queue_index,
- long cookie)
+static inline long __do_kvm_notify(struct subchannel_id schid,
+ unsigned long queue_index,
+ long cookie)
{
register unsigned long __nr asm("1") = KVM_S390_VIRTIO_CCW_NOTIFY;
register struct subchannel_id __schid asm("2") = schid;
@@ -383,6 +384,14 @@ static inline long do_kvm_notify(struct subchannel_id schid,
return __rc;
}
+static inline long do_kvm_notify(struct subchannel_id schid,
+ unsigned long queue_index,
+ long cookie)
+{
+ diag_stat_inc(DIAG_STAT_X500);
+ return __do_kvm_notify(schid, queue_index, cookie);
+}
+
static bool virtio_ccw_kvm_notify(struct virtqueue *vq)
{
struct virtio_ccw_vq_info *info = vq->priv;