Re: [libvirt PATCH v2] qemu: ramfb video device doesn't support PCI address

Although a ramfb video device is not a PCI device, we don't currently report an error for ramfb device definitions containing a PCI address. However, a guest configured with such a device will fail to start: # virsh start test1 error: Failed to start domain test1 error: internal error: qemu unexpectedly closed the monitor: 2020-06-16T05:23:02.759221Z qemu-kvm: -device ramfb,id=video0,bus=pcie.0,addr=0x1: Device 'ramfb' can't go on PCIE bus A better approach is to reject any device definitions that contain PCI addresses. While this is a change in behavior, any existing configurations were non-functional. https://bugzilla.redhat.com/show_bug.cgi?id=1847259 Signed-off-by: Jonathon Jongsma <jjongsma(a)redhat.com&gt; --- changes in v2: - move validation to qemu-specific validation function as suggested by Laine src/qemu/qemu_validate.c | 8 ++++++++ tests/qemuxml2argvtest.c | 1 + 2 files changed, 9 insertions(+) diff --git a/src/qemu/qemu_validate.c b/src/qemu/qemu_validate.c index 5082a29dc7..b13c03759e 100644 --- a/src/qemu/qemu_validate.c +++ b/src/qemu/qemu_validate.c @@ -1925,6 +1925,14 @@ qemuValidateDomainDeviceDefVideo(const virDomainVideoDef *video, if (qemuValidateDomainVirtioOptions(video->virtio, qemuCaps) < 0) return -1; + if (video->type == VIR_DOMAIN_VIDEO_TYPE_RAMFB && + video->info.type != VIR_DOMAIN_DEVICE_ADDRESS_TYPE_NONE) { + virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s", + _("'address' is not supported for 'ramfb' video devices")); + return -1; + } + + return 0; } diff --git a/tests/qemuxml2argvtest.c b/tests/qemuxml2argvtest.c index 1195f9c982..f2522fa530 100644 --- a/tests/qemuxml2argvtest.c +++ b/tests/qemuxml2argvtest.c @@ -2276,6 +2276,7 @@ mymain(void) QEMU_CAPS_VIRTIO_GPU_MAX_OUTPUTS); DO_TEST_CAPS_LATEST("video-bochs-display-device"); DO_TEST_CAPS_LATEST("video-ramfb-display-device"); + DO_TEST_CAPS_LATEST_PARSE_ERROR("video-ramfb-display-device-pci-address");

DO_TEST("video-none-device", QEMU_CAPS_VNC); DO_TEST_PARSE_ERROR("video-invalid-multiple-devices", NONE);