[libvirt] [PATCH] qemu: multiqueue for ccw devices

[Boris Fiuczynski]

Allow ccw devices to be used with multiqueues.

Signed-off-by: Boris Fiuczynski <fiuczy at linux.vnet.ibm.com>
Reviewed-by: Matthew Rosato <mjrosato at linux.vnet.ibm.com>
Reviewed-by: Daniel Hansel <daniel.hansel at linux.vnet.ibm.com>
Reviewed-by: Cornelia Huck <cornelia.huck at de.ibm.comCornelia Huck <cornelia.huck at de.ibm.com>>

---
 src/qemu/qemu_command.c | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/src/qemu/qemu_command.c b/src/qemu/qemu_command.c
index 2137985..0205831 100644
--- a/src/qemu/qemu_command.c
+++ b/src/qemu/qemu_command.c
@@ -5062,9 +5062,13 @@ qemuBuildNicDevStr(virDomainDefPtr def,
         }
     }
     if (usingVirtio && vhostfdSize > 1) {
-        /* As advised at http://www.linux-kvm.org/page/Multiqueue
-         * we should add vectors=2*N+2 where N is the vhostfdSize */
-        virBufferAsprintf(&buf, ",mq=on,vectors=%zu", 2 * vhostfdSize + 2);
+        if (net->info.type == VIR_DOMAIN_DEVICE_ADDRESS_TYPE_CCW) {
+            virBufferAsprintf(&buf, ",mq=on");
+        } else {
+            /* As advised at http://www.linux-kvm.org/page/Multiqueue
+             * we should add vectors=2*N+2 where N is the vhostfdSize */
+            virBufferAsprintf(&buf, ",mq=on,vectors=%zu", 2 * vhostfdSize + 2);
+        }
     }
     if (vlan == -1)
         virBufferAsprintf(&buf, ",netdev=host%s", net->info.alias);
-- 
2.3.0