diff mbox series

[for,8.0,v8,10/12] vdpa: store x-svq parameter in VhostVDPAState

Message ID 20221124155158.2109884-11-eperezma@redhat.com (mailing list archive)
State New, archived
Headers show
Series ASID support in vhost-vdpa net | expand

Commit Message

Eugenio Perez Martin Nov. 24, 2022, 3:51 p.m. UTC 
CVQ can be shadowed two ways:
- Device has x-svq=on parameter (current way)
- The device can isolate CVQ in its own vq group

QEMU needs to check for the second condition dynamically, because CVQ
index is not known before the driver ack the features. Since this is
dynamic, the CVQ isolation could vary with different conditions, making
it possible to go from "not isolated group" to "isolated".

Saving the cmdline parameter in an extra field so we never disable CVQ
SVQ in case the device was started with x-svq cmdline.

Signed-off-by: Eugenio Pérez <eperezma@redhat.com>
Acked-by: Jason Wang <jasowang@redhat.com>
---
 net/vhost-vdpa.c | 3 +++
 1 file changed, 3 insertions(+)
diff mbox series

Patch

diff --git a/net/vhost-vdpa.c b/net/vhost-vdpa.c
index b40b1ddf0d..3ff149dfd9 100644
--- a/net/vhost-vdpa.c
+++ b/net/vhost-vdpa.c
@@ -38,6 +38,8 @@  typedef struct VhostVDPAState {
     void *cvq_cmd_out_buffer;
     virtio_net_ctrl_ack *status;
 
+    /* The device always have SVQ enabled */
+    bool always_svq;
     bool started;
 } VhostVDPAState;
 
@@ -583,6 +585,7 @@  static NetClientState *net_vhost_vdpa_init(NetClientState *peer,
 
     s->vhost_vdpa.device_fd = vdpa_device_fd;
     s->vhost_vdpa.index = queue_pair_index;
+    s->always_svq = svq;
     s->vhost_vdpa.shadow_vqs_enabled = svq;
     s->vhost_vdpa.iova_tree = iova_tree;
     if (!is_datapath) {