[libvirt-users] Cannot Write xvga=yes in xml file
Hello,my system info: virsh verison Compiled against library: libvirt 3.9.0 Using library: libvirt 3.9.0 Using API: QEMU 3.9.0 Running hypervisor: QEMU 2.10.90 And i want to pass through my gpu to my window 7 guest with <hostdev>, next line is comand i use: <hostdev mode='subsystem' type='pci' managed='yes' xvga='yes'> <source> <address domain='0x0000' bus='0x01' slot='0x00' function='0x0'/> </source> <rom bar='on' file='/root/gpu.dump'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x07' function='0x0'/> </hostdev> But i get this error: XML document failed to validate against schema: Unable to validate doc against /ocl/share/libvirt/schemas/domain.rng Extra element devices in interleave Element domain failed to validate content If i delete xvga='yes',it's ok, but i get a other question, my display is not light.
On 12/20/2017 09:40 PM, Rogue S.T wrote:
Hello,my system info: virsh verison Compiled against library: libvirt 3.9.0 Using library: libvirt 3.9.0 Using API: QEMU 3.9.0 Running hypervisor: QEMU 2.10.90 And i want to pass through my gpu to my window 7 guest with <hostdev>, next line is comand i use: <hostdev mode='subsystem' type='pci' managed='yes' xvga='yes'>
I'm not sure where you got the idea that libvirt's <hostdev> element had an attribute called "xvga", but it doesn't. If your GPU needs to have QEMU's xvga setting turned on, this posting from ALex's blog explains how to do it using libvirt's QEMU commandline passthrough: http://vfio.blogspot.com/2016/09/passing-qemu-command-line-options.html I would recommend reading all the other postings in his blog as well, as they are very informative.
<source> <address domain='0x0000' bus='0x01' slot='0x00' function='0x0'/> </source> <rom bar='on' file='/root/gpu.dump'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x07' function='0x0'/> </hostdev> But i get this error: XML document failed to validate against schema: Unable to validate doc against /ocl/share/libvirt/schemas/domain.rng Extra element devices in interleave Element domain failed to validate content If i delete xvga='yes',it's ok, but i get a other question, my display is not light.
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Yes, I can use guest with this way, But when i hot-add my graphics card , Guest will reboot. So i want to try it with <hostdev>. Somehow , If i use "hostdev" without xvga , my screen will be black. If we have no hostdev, do you have other methods can help me to use hot-plug my graphics card? At 2018-01-04 23:27:52, "Laine Stump" <laine@redhat.com> wrote:
On 12/20/2017 09:40 PM, Rogue S.T wrote:
Hello,my system info: virsh verison Compiled against library: libvirt 3.9.0 Using library: libvirt 3.9.0 Using API: QEMU 3.9.0 Running hypervisor: QEMU 2.10.90 And i want to pass through my gpu to my window 7 guest with <hostdev>, next line is comand i use: <hostdev mode='subsystem' type='pci' managed='yes' xvga='yes'>
I'm not sure where you got the idea that libvirt's <hostdev> element had an attribute called "xvga", but it doesn't.
If your GPU needs to have QEMU's xvga setting turned on, this posting from ALex's blog explains how to do it using libvirt's QEMU commandline passthrough:
http://vfio.blogspot.com/2016/09/passing-qemu-command-line-options.html
I would recommend reading all the other postings in his blog as well, as they are very informative.
<source> <address domain='0x0000' bus='0x01' slot='0x00' function='0x0'/> </source> <rom bar='on' file='/root/gpu.dump'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x07' function='0x0'/> </hostdev> But i get this error: XML document failed to validate against schema: Unable to validate doc against /ocl/share/libvirt/schemas/domain.rng Extra element devices in interleave Element domain failed to validate content If i delete xvga='yes',it's ok, but i get a other question, my display is not light.
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(Please don't top-post your replies on this list. Post them inline with the text you are responding to) On 01/05/2018 02:58 AM, Rogue S.T wrote:
Yes, I can use guest with this way, But when i hot-add my graphics card , Guest will reboot.
It's very .... "ambitious" to expect hot-plug of a vfio-assigned graphics card to work properly. I doubt that has been tested much, if at all - vfio and QEMU might handle it properly, but it's very likely that the guest OS would not.
So i want to try it with <hostdev>. Somehow , If i use "hostdev" without xvga , my screen will be black. If we have no hostdev, do you have other methods can help me to use hot-plug my graphics card?
I didn't say there is no <hostdev>, I said that the <hostdev> element has no attribute called "xvga". QEMU itself *does* have a commandline option called "xvga" though, and that can be set using libvirt's "QEMU commandline passthrough", following the directions on the page that I linked in my original response. Of course, QEMU commandline passthrough can't be used when hot-plugging devices - maybe that's what you're trying to point out; if that's really your problem, then there is no solution (other than to not hot-plug the GPU).
At 2018-01-04 23:27:52, "Laine Stump" <laine@redhat.com> wrote:
On 12/20/2017 09:40 PM, Rogue S.T wrote:
Hello,my system info: virsh verison Compiled against library: libvirt 3.9.0 Using library: libvirt 3.9.0 Using API: QEMU 3.9.0 Running hypervisor: QEMU 2.10.90 And i want to pass through my gpu to my window 7 guest with <hostdev>, next line is comand i use: <hostdev mode='subsystem' type='pci' managed='yes' xvga='yes'>
I'm not sure where you got the idea that libvirt's <hostdev> element had an attribute called "xvga", but it doesn't.
If your GPU needs to have QEMU's xvga setting turned on, this posting from ALex's blog explains how to do it using libvirt's QEMU commandline passthrough:
http://vfio.blogspot.com/2016/09/passing-qemu-command-line-options.html
I would recommend reading all the other postings in his blog as well, as they are very informative.
<source> <address domain='0x0000' bus='0x01' slot='0x00' function='0x0'/> </source> <rom bar='on' file='/root/gpu.dump'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x07' function='0x0'/> </hostdev> But i get this error: XML document failed to validate against schema: Unable to validate doc against /ocl/share/libvirt/schemas/domain.rng Extra element devices in interleave Element domain failed to validate content If i delete xvga='yes',it's ok, but i get a other question, my display is not light.
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