From: Pavel Fedin <p.fedin@samsung.com>
Date: Fri, 17 Jul 2015 11:27:47 +0000 (+0300)
Subject: qemu: Allow to plug virtio-net-pci into PCIe slot
X-Git-Url: http://xenbits.xensource.com/gitweb?a=commitdiff_plain;h=ede34470fde19c0f326cdb0dfca39fa86fd9ec16;p=libvirt.git

qemu: Allow to plug virtio-net-pci into PCIe slot

virtio-net-pci adapter is capable to use irqfd with vhost-net only in MSI-X
mode, which appears to be available only on PCIe bus, at least on ARM

Signed-off-by: Pavel Fedin <p.fedin@samsung.com>
---

diff --git a/src/qemu/qemu_command.c b/src/qemu/qemu_command.c
index 0fe14758ca..eb00f0f61e 100644
--- a/src/qemu/qemu_command.c
+++ b/src/qemu/qemu_command.c
@@ -1662,6 +1662,14 @@ qemuCollectPCIAddress(virDomainDefPtr def ATTRIBUTE_UNUSED,
          */
         flags = VIR_PCI_CONNECT_TYPE_PCI | VIR_PCI_CONNECT_TYPE_PCIE;
         break;
+
+    case VIR_DOMAIN_DEVICE_NET:
+        if (STREQ(device->data.net->model, "virtio")) {
+            /* virtio-net-pci adapter in qemu has to be plugged into PCIe slot
+             * in order to be able to use irqfds with vhost-net
+             */
+            flags = VIR_PCI_CONNECT_TYPE_PCI | VIR_PCI_CONNECT_TYPE_PCIE;
+        }
     }
 
     /* Ignore implicit controllers on slot 0:0:1.0: