(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@xxxxxxxxxx> 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. >>> >>> >>> >>> >>> >>> >>> >>> >>> >>> _______________________________________________ >>> libvirt-users mailing list >>> libvirt-users@xxxxxxxxxx >>> https://www.redhat.com/mailman/listinfo/libvirt-users >>> > > > > > > _______________________________________________ libvirt-users mailing list libvirt-users@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/libvirt-users
