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....@oracle.com>
---
include/hw/virtio/vhost-vdpa.h | 9 +++++++++
1 file changed, 9 insertions(+)
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 {
--
1.8.3.1
