[vfio-users] win10 & system thread exception

[Torbjorn Jansson]

On 2016-05-15 13:57, Okky Hendriansyah wrote:
> On Sun, May 15, 2016 at 6:28 PM, Torbjorn Jansson <
> torbjorn.jansson at mbox200.swipnet.se> wrote:
> ...
>
>> /usr/local/bin/qemu-system-x86_64 -machine accel=kvm -name win10 -S
>> -machine pc-i440fx-2.3,accel=kvm,usb=off -cpu core2duo,kvm=off -drive
>> file=/usr/share/edk2.git/ovmf-x64/OVMF_CODE-pure-efi.fd,if=pflash,format=raw,unit=0,readonly=on
>> -drive
>> file=/var/lib/libvirt/qemu/nvram/win10_VARS.fd,if=pflash,format=raw,unit=1
>> -m 4096 -realtime mlock=off -smp 2,sockets=1,cores=2,threads=1 -uuid
>> 098e9157-b878-4882-9c7a-22bd334920c1 -nographic -no-user-config -nodefaults
>> -chardev
>> socket,id=charmonitor,path=/var/lib/libvirt/qemu/win10.monitor,server,nowait
>> -mon chardev=charmonitor,id=monitor,mode=control -rtc
>> base=localtime,driftfix=slew -global kvm-pit.lost_tick_policy=discard
>> -no-hpet -no-shutdown -global PIIX4_PM.disable_s3=1 -global
>> PIIX4_PM.disable_s4=1 -boot strict=on -device
>> ich9-usb-ehci1,id=usb,bus=pci.0,addr=0x6.0x7 -device
>> ich9-usb-uhci1,masterbus=usb.0,firstport=0,bus=pci.0,multifunction=on,addr=0x6
>> -device ich9-usb-uhci2,masterbus=usb.0,firstport=2,bus=pci.0,addr=0x6.0x1
>> -device ich9-usb-uhci3,masterbus=usb.0,firstport=4,bus=pci.0,addr=0x6.0x2
>> -drive
>> file=/mnt/store/virt/vms/Win10.qcow2,if=none,id=drive-virtio-disk0,format=qcow2
>> -device
>> virtio-blk-pci,scsi=off,bus=pci.0,addr=0x8,drive=drive-virtio-disk0,id=virtio-disk0,bootindex=1
>> -drive
>> file=/mnt/store/virt/isos/virtio-win-0.1.117.iso,if=none,id=drive-ide0-0-1,readonly=on,format=raw
>> -device ide-cd,bus=ide.0,unit=1,drive=drive-ide0-0-1,id=ide0-0-1 -netdev
>> tap,fd=24,id=hostnet0,vhost=on,vhostfd=27 -device
>> virtio-net-pci,netdev=hostnet0,id=net0,mac=52:54:00:12:48:26,bus=pci.0,addr=0x3
>> -device usb-host,hostbus=5,hostaddr=6,id=hostdev0 -device
>> vfio-pci,host=05:00.0,id=hostdev1,bus=pci.0,addr=0x2 -device
>> vfio-pci,host=05:00.1,id=hostdev2,bus=pci.0,addr=0x4 -device
>> vfio-pci,host=03:00.0,id=hostdev3,bus=pci.0,addr=0x5 -device
>> vfio-pci,host=03:00.1,id=hostdev4,bus=pci.0,addr=0x9 -device
>> vfio-pci,host=04:00.0,id=hostdev5,bus=pci.0,addr=0xa -device
>> vfio-pci,host=04:00.1,id=hostdev6,bus=pci.0,addr=0xb -device
>> virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x7 -msg timestamp=on
>>
>
> I see that you already disable KVM CPUID in your working config. I noticed
> that your CPU model is core2duo. What happens if you change that to
> host-passthrough in virt-manager? Please try to boot without changing
> anything beside core2duo to host-passthrough. If it can boot, verify that
> it recognizes in System info. If it does not detect your i5-3470, try
> running the Display Driver Utility. [1]
>  ...
>

i changed cpu model to host-passthru and i can confirm that device 
manager have the expected cpu model.
after than turned on the hyperv settings and it again crashed.
but after a bit of testing it turns out this works (=doesn't crash):

<hyperv>
   <relaxed state='on'/>
   <vapic state='on'/>
   <spinlocks state='on' retries='8191'/>
</hyperv>
<kvm>
   <hidden state='on'/>
</kvm>
...
<timer name='hypervclock' present='yes'/>

if i change kvm hidden state to off, it crashes with system thread 
exception.
as it is above it boots and seems to work, haven't done any extensive 
testing yet.

i have checked the qemu command line and can confirm it contains 
hv_vendor_id and some other hv_ settings.