[libvirt PATCH] 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@redhat.com> --- src/conf/domain_conf.c | 7 +++++++ tests/qemuxml2argvtest.c | 1 + 2 files changed, 8 insertions(+) diff --git a/src/conf/domain_conf.c b/src/conf/domain_conf.c index fc7fcfb0c6..1a06cb3f4b 100644 --- a/src/conf/domain_conf.c +++ b/src/conf/domain_conf.c @@ -6608,6 +6608,13 @@ virDomainVideoDefValidate(const virDomainVideoDef *video, 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; + } + /* it doesn't make sense to pair video device type 'none' with any other * types, there can be only a single video device in such case */ 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); -- 2.21.3
On 6/24/20 7:06 PM, Jonathon Jongsma wrote:
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@redhat.com> ---
Reviewed-by: Daniel Henrique Barboza <danielhb413@gmail.com>
On 6/24/20 6:06 PM, Jonathon Jongsma wrote:
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@redhat.com> --- src/conf/domain_conf.c | 7 +++++++ tests/qemuxml2argvtest.c | 1 + 2 files changed, 8 insertions(+)
diff --git a/src/conf/domain_conf.c b/src/conf/domain_conf.c index fc7fcfb0c6..1a06cb3f4b 100644 --- a/src/conf/domain_conf.c +++ b/src/conf/domain_conf.c @@ -6608,6 +6608,13 @@ virDomainVideoDefValidate(const virDomainVideoDef *video, 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; + } +
There may be disagreement about this, and in practical terms it makes no difference (because no domain type other than QEMU is ever going to have one of these devices anyway), but since ramfb is a qemu-specific device (isn't it?), I think this check would be better put in qemu_validate.c:qemuValidateDomainDeviceDevVideo(), which is the qemu-specific validation function for video devices. (I see there is already validation in virDomainVideoDefValidate() for a qemu-specific (afaik) video type - i is even checking for one backend that is named VIR_DOMAIN_VIDEO_BACKEND_TYPE_QEMU) I don't really have a strong opinion though, since the other hypervisor drivers don't seem all that concerned about fleshing out their validation functions, and what you have works properly for qemu :-P
/* it doesn't make sense to pair video device type 'none' with any other * types, there can be only a single video device in such case */ 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);
On Wed, 2020-06-24 at 23:21 -0400, Laine Stump wrote:
On 6/24/20 6:06 PM, Jonathon Jongsma wrote:
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@redhat.com> --- src/conf/domain_conf.c | 7 +++++++ tests/qemuxml2argvtest.c | 1 + 2 files changed, 8 insertions(+)
diff --git a/src/conf/domain_conf.c b/src/conf/domain_conf.c index fc7fcfb0c6..1a06cb3f4b 100644 --- a/src/conf/domain_conf.c +++ b/src/conf/domain_conf.c @@ -6608,6 +6608,13 @@ virDomainVideoDefValidate(const virDomainVideoDef *video, 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; + } +
There may be disagreement about this, and in practical terms it makes no difference (because no domain type other than QEMU is ever going to have one of these devices anyway), but since ramfb is a qemu-specific device (isn't it?), I think this check would be better put in qemu_validate.c:qemuValidateDomainDeviceDevVideo(), which is the qemu-specific validation function for video devices.
(I see there is already validation in virDomainVideoDefValidate() for a qemu-specific (afaik) video type - i is even checking for one backend that is named VIR_DOMAIN_VIDEO_BACKEND_TYPE_QEMU)
I don't really have a strong opinion though, since the other hypervisor drivers don't seem all that concerned about fleshing out their validation functions, and what you have works properly for qemu :-P
For what it's worth, I agree with you. I'll re-spin the patch. Jonathon
participants (3)
-
Daniel Henrique Barboza -
Jonathon Jongsma -
Laine Stump