diff mbox series

[10/12] vdpa: define SVQ transitioning state for mode switching

Message ID 1707910082-10243-11-git-send-email-si-wei.liu@oracle.com (mailing list archive)
State New, archived
Headers show
Series Preparatory patches for live migration downtime improvement | expand

Commit Message

Si-Wei Liu Feb. 14, 2024, 11:28 a.m. UTC 
Will be used in following patches.

DISABLING(-1) means SVQ is being switched off to passthrough
mode.

ENABLING(1) means passthrough VQs are being switched to SVQ.

DONE(0) means SVQ switching is completed.

Signed-off-by: Si-Wei Liu <si-wei.liu@oracle.com>
---
 include/hw/virtio/vhost-vdpa.h | 9 +++++++++
 1 file changed, 9 insertions(+)
diff mbox series

Patch

diff --git a/include/hw/virtio/vhost-vdpa.h b/include/hw/virtio/vhost-vdpa.h
index ad754eb..449bf5c 100644
--- a/include/hw/virtio/vhost-vdpa.h
+++ b/include/hw/virtio/vhost-vdpa.h
@@ -30,6 +30,12 @@  typedef struct VhostVDPAHostNotifier {
     void *addr;
 } VhostVDPAHostNotifier;
 
+typedef enum SVQTransitionState {
+    SVQ_TSTATE_DISABLING = -1,
+    SVQ_TSTATE_DONE,
+    SVQ_TSTATE_ENABLING
+} SVQTransitionState;
+
 /* Info shared by all vhost_vdpa device models */
 typedef struct vhost_vdpa_shared {
     int device_fd;
@@ -67,6 +73,9 @@  typedef struct vhost_vdpa_shared {
 
     /* Vdpa must send shadow addresses as IOTLB key for data queues, not GPA */
     bool shadow_data;
+
+    /* SVQ switching is in progress, or already completed? */
+    SVQTransitionState svq_switching;
 } VhostVDPAShared;
 
 typedef struct vhost_vdpa {