reply link: https://www.redhat.com/archives/vfio-users/2018-August/msg00033.html
Acewind <acew...@gmail.com> 于2018年10月12日周五 下午11:17写道： > I remeber your reply here: > https://www.mail-archive.com/vfio-users@redhat.com/msg03415.html > You said QEMU will fix the rom with correct device id automatically when > it's reading the rom directly from the device. > > In today's env, the host is already booted in legacy mode. Do I still need > to dump the rom and fix the device id? > > If I need, can I dump with these commands? > echo 1 > /sys/devices/pci0000:00/0000:00:02.0/rom > cat /sys/devices/pci0000:00/0000:00:02.0/rom > vbios.dump > echo 0 > /sys/devices/pci0000:00/0000:00:02.0/rom > > Thanks! > > Alex Williamson <alex.william...@redhat.com> 于2018年10月12日周五 下午10:47写道： > >> On Fri, 12 Oct 2018 17:41:42 +0800 >> Acewind <acew...@gmail.com> wrote: >> >> > The two cpus all both SkyLake arch. >> > >> > I have successed to passthrough IGD device to Win7/Win10 on an i3-6100 >> > machine with Fedora 25. >> > I use legacy mode and set x-igd-gms=1 on qemu command line. >> > >> > When I work on another machine of i3-6100U with the same solution. >> >> You might try configuring the host BIOS to boot into legacy mode >> (non-UEFI) and use a live CD to get the legacy mode video BIOS from >> IGD. You'll need to run rom-fixer on it to correct the checksum and >> device ID. Then use the rom file option in libvirt xml to pass this >> image to the VM. I've had this help before when the host system boots >> via UEFI natively. Thanks, >> >> Alex >> >
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