Mailing List Archive

Hello

So,please come back to the passthrough of my graphic card with xen,that it
does not work. Please note that I'm not trying to use my existing windows
10 installation anymore. Instead I have installed windows 10 from the
official microsoft iso image. The cfg file that I'm using is like this :

builder='hvm'
memory = 8124
name = 'win10'
vcpus=6
pae=1
acpi=1
apic=1
vif = [ 'mac=00:16:3e:68:e1:01,type=vif,bridge=xenbr0' ]
disk = [ 'phy:/dev/guest/win10,hda,w' ,
'file:/media/install/Win10x64.iso,hdb:cdrom,r' ]
#device_model_version = 'qemu-xen-traditional'
boot='dc'
#boot='c'
sdl=1
vnc=1
serial='pty'
tsc_mode="default"
viridian=1
usb=1
usbdevice='tablet'
gfx_passthru=0

pci=[ '01:00.0', '01:00.1' , '01:00.2' , '01:00.3' ]
localtime=1
xen_platform_pci=1
pci_power_mgmt=1
stdvga = 0
serial = 'pty'
on_poweroff = 'destroy'
on_reboot = 'destroy'
on_crash = 'destroy'

device_model_args_hvm = [
# Debug OVMF
'-chardev', 'file,id=debugcon,path=/etc/xen/win10.log,',
'-device', 'isa-debugcon,iobase=0x402,chardev=debugcon',
]

Before to create the guest,I run this script :

if [ $# -eq 0 ]; then
echo "Require PCI devices in format: <domain>:<bus>:<slot>.<function>"
echo "Eg: $(basename $0) 0000:00:1b.0"
exit 1
fi

modprobe xen-pciback

for pcidev in $@; do
if [ -h /sys/bus/pci/devices/"$pcidev"/driver ]; then
echo "Unbinding $pcidev from" $(basename $(readlink
/sys/bus/pci/devices/"$pcidev"/driver))
echo -n "$pcidev" > /sys/bus/pci/devices/"$pcidev"/driver/unbind
fi
echo "Binding $pcidev to pciback"
echo -n "$pcidev" > /sys/bus/pci/drivers/pciback/new_slot
echo -n "$pcidev" > /sys/bus/pci/drivers/pciback/bind
done

for 4 times,like this :

root@ziomario-I9:/etc/xen# ./pciback-0000:01:00.0.sh 0000:01:00.0
Unbinding 0000:01:00.0 from nvidia
Binding 0000:01:00.0 to pciback

root@ziomario-I9:/etc/xen# ./pciback-0000:01:00.0.sh 0000:01:00.1
Unbinding 0000:01:00.1 from snd_hda_intel
Binding 0000:01:00.1 to pciback

root@ziomario-I9:/etc/xen# ./pciback-0000:01:00.0.sh 0000:01:00.2
Unbinding 0000:01:00.2 from xhci_hcd
Binding 0000:01:00.2 to pciback

root@ziomario-I9:/etc/xen# ./pciback-0000:01:00.0.sh 0000:01:00.3
Unbinding 0000:01:00.3 from nvidia-gpu
Binding 0000:01:00.3 to pciback

it seems good,but It is not,infact this is what happens when I create the
guest :

libxl: error: libxl_pci.c:1477:libxl__device_pci_reset: The kernel doesn't
support reset from sysfs for PCI device 0000:01:00.1
libxl: error: libxl_pci.c:1477:libxl__device_pci_reset: The kernel doesn't
support reset from sysfs for PCI device 0000:01:00.2
libxl: error: libxl_pci.c:1477:libxl__device_pci_reset: The kernel doesn't
support reset from sysfs for PCI device 0000:01:00.3


I tried to pass only the first line,like this :


pci=[ '01:00.0' ]


the guest starts,but :


1) the resolution is black and white,640x480 and I can't increase it

2) the nvidia graphic card can't be installed,it says that it can't be
installed on this computer

3) I see two microsoft basic display adapter,no cirrus graphic card.

[image: Schermata del 2020-07-25 12-47-56.png]


can u give me some suggestion ?