Re: [PATCH] qemu: Fix domxml-to-native command failure

virsh command domxml-to-native failed with below error but start command suceed for same domain xml. "internal error: invalid PCI passthrough type 'default'" If host pci device's driver attribute isn't defined in domain xml, qemu driver will choose a proper value based on host environment before starting qemu process. But this is missed in domxml-to-native command, add the same logic so domxml-to-native could pass. Signed-off-by: Zhenzhong Duan <zhenzhong.duan(a)intel.com&gt; --- src/qemu/qemu_domain.c | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/src/qemu/qemu_domain.c b/src/qemu/qemu_domain.c index 63b13b6875c9..517c90f93f0a 100644 --- a/src/qemu/qemu_domain.c +++ b/src/qemu/qemu_domain.c @@ -11274,6 +11274,17 @@ qemuDomainPrepareHostdev(virDomainHostdevDef *hostdev, } } } + if (hostdev->mode == VIR_DOMAIN_HOSTDEV_MODE_SUBSYS && + hostdev->source.subsys.type == VIR_DOMAIN_HOSTDEV_SUBSYS_TYPE_PCI) { + bool supportsPassthroughVFIO = qemuHostdevHostSupportsPassthroughVFIO(); + virDomainHostdevSubsysPCIBackendType *backend = &hostdev->source.subsys.u.pci.backend; + + if (*backend == VIR_DOMAIN_HOSTDEV_PCI_BACKEND_DEFAULT && + supportsPassthroughVFIO && + virQEMUCapsGet(priv->qemuCaps, QEMU_CAPS_DEVICE_VFIO_PCI)) { + *backend = VIR_DOMAIN_HOSTDEV_PCI_BACKEND_VFIO; + } + }