path: root/drivers/s390/cio/vfio_ccw_private.h
diff options
authorCornelia Huck <cohuck@redhat.com>2019-08-15 13:53:41 +0200
committerCornelia Huck <cohuck@redhat.com>2019-08-23 12:53:32 +0200
commit60e05d1cf0875f0cf73472f7dff71d9933c5b697 (patch)
treeac40057f062cc9fe775c0268f8e695bffcf46a2e /drivers/s390/cio/vfio_ccw_private.h
parents390/paes: Prepare paes functions for large key blobs (diff)
vfio-ccw: add some logging
Usually, the common I/O layer logs various things into the s390 cio debug feature, which has been very helpful in the past when looking at crash dumps. As vfio-ccw devices unbind from the standard I/O subchannel driver, we lose some information there. Let's introduce some vfio-ccw debug features and log some things there. (Unfortunately we cannot reuse the cio debug feature from a module.) Message-Id: <20190816151505.9853-2-cohuck@redhat.com> Reviewed-by: Eric Farman <farman@linux.ibm.com> Signed-off-by: Cornelia Huck <cohuck@redhat.com>
Diffstat (limited to '')
1 files changed, 17 insertions, 0 deletions
diff --git a/drivers/s390/cio/vfio_ccw_private.h b/drivers/s390/cio/vfio_ccw_private.h
index f1092c3dc1b1..bbe9babf767b 100644
--- a/drivers/s390/cio/vfio_ccw_private.h
+++ b/drivers/s390/cio/vfio_ccw_private.h
@@ -17,6 +17,7 @@
#include <linux/eventfd.h>
#include <linux/workqueue.h>
#include <linux/vfio_ccw.h>
+#include <asm/debug.h>
#include "css.h"
#include "vfio_ccw_cp.h"
@@ -139,4 +140,20 @@ static inline void vfio_ccw_fsm_event(struct vfio_ccw_private *private,
extern struct workqueue_struct *vfio_ccw_work_q;
+/* s390 debug feature, similar to base cio */
+extern debug_info_t *vfio_ccw_debug_msg_id;
+extern debug_info_t *vfio_ccw_debug_trace_id;
+#define VFIO_CCW_TRACE_EVENT(imp, txt) \
+ debug_text_event(vfio_ccw_debug_trace_id, imp, txt)
+#define VFIO_CCW_MSG_EVENT(imp, args...) \
+ debug_sprintf_event(vfio_ccw_debug_msg_id, imp, ##args)
+static inline void VFIO_CCW_HEX_EVENT(int level, void *data, int length)
+ debug_event(vfio_ccw_debug_trace_id, level, data, length);