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Re: [vfio-users] W10: installing RX Vega 56 drivers locks up VM



On Thu, 28 Mar 2019 at 20:32, Tmplt <tmplt dragons rocks> wrote:
>
> On 3/28/19 8:02 PM, Kash Pande wrote:
> > kvm module parameter ignore_msrs is needed here.
> Is this much different from the
>
>   echo 1 > /sys/module/kvm/parameters/ignore_msrs

I have a very similar setup with a Sapphire RX Vega 56 and also
observing this lockup.
I am using an unpatched Debian 4.19.0. Qemu 3.1.0. Libvirt 5.0.0. A
single host core is pegged at 100%. I've attached my XML too.
$ cat /sys/module/kvm/parameters/ignore_msrs
Y
I cannot find any logs indicating any problems...
$ sudo journalctl | grep kvm
Mar 28 20:35:52 socrates kernel: Command line:
BOOT_IMAGE=/boot/vmlinuz-4.19.0-4-amd64
root=/dev/mapper/VolGroup00-lvdebian ro iommu=pt
amd_iommu=force_isolation rd.driver.pre=vfio-pci hugepagesz=1GB
hugepages=16 vfio_iommu_type1.allow_unsafe_interrupts=1
kvm.ignore_msrs=1
Mar 28 20:35:52 socrates kernel: Kernel command line:
BOOT_IMAGE=/boot/vmlinuz-4.19.0-4-amd64
root=/dev/mapper/VolGroup00-lvdebian ro iommu=pt
amd_iommu=force_isolation rd.driver.pre=vfio-pci hugepagesz=1GB
hugepages=16 vfio_iommu_type1.allow_unsafe_interrupts=1
kvm.ignore_msrs=1
Mar 28 20:35:52 socrates kernel: kvm: Nested Virtualization enabled
Mar 28 20:35:52 socrates kernel: kvm: Nested Paging enabled
$ sudo journalctl | grep msrs
Mar 28 20:35:52 socrates kernel: Command line:
BOOT_IMAGE=/boot/vmlinuz-4.19.0-4-amd64
root=/dev/mapper/VolGroup00-lvdebian ro iommu=pt
amd_iommu=force_isolation rd.driver.pre=vfio-pci hugepagesz=1GB
hugepages=16 vfio_iommu_type1.allow_unsafe_interrupts=1
kvm.ignore_msrs=1
Mar 28 20:35:52 socrates kernel: Kernel command line:
BOOT_IMAGE=/boot/vmlinuz-4.19.0-4-amd64
root=/dev/mapper/VolGroup00-lvdebian ro iommu=pt
amd_iommu=force_isolation rd.driver.pre=vfio-pci hugepagesz=1GB
hugepages=16 vfio_iommu_type1.allow_unsafe_interrupts=1
kvm.ignore_msrs=1
<domain type='kvm' xmlns:qemu='http://libvirt.org/schemas/domain/qemu/1.0'>
  <name>win10_backup</name>
  <uuid>4b697e59-793e-450f-8722-38e785831796</uuid>
  <title>Windows 10</title>
  <description>Windows gaming VM</description>
  <memory unit='KiB'>16777216</memory>
  <currentMemory unit='KiB'>16777216</currentMemory>
  <vcpu placement='static'>8</vcpu>
  <iothreads>1</iothreads>
  <cputune>
    <vcpupin vcpu='0' cpuset='8'/>
    <vcpupin vcpu='1' cpuset='9'/>
    <vcpupin vcpu='2' cpuset='10'/>
    <vcpupin vcpu='3' cpuset='11'/>
    <vcpupin vcpu='4' cpuset='12'/>
    <vcpupin vcpu='5' cpuset='13'/>
    <vcpupin vcpu='6' cpuset='14'/>
    <vcpupin vcpu='7' cpuset='15'/>
    <emulatorpin cpuset='0-1'/>
    <iothreadpin iothread='1' cpuset='0-1'/>
  </cputune>
  <os>
    <type arch='x86_64' machine='pc-i440fx-3.1'>hvm</type>
    <loader readonly='yes' type='pflash'>/usr/share/OVMF/OVMF_CODE.fd</loader>
    <nvram>/var/lib/libvirt/qemu/nvram/win10_backup_VARS.fd</nvram>
  </os>
  <features>
    <acpi/>
    <apic/>
    <hyperv>
      <relaxed state='on'/>
      <vapic state='on'/>
      <spinlocks state='on' retries='8191'/>
    </hyperv>
    <vmport state='off'/>
  </features>
  <cpu mode='host-passthrough' check='none'>
    <topology sockets='1' cores='4' threads='2'/>
    <cache level='3' mode='emulate'/>
    <feature policy='require' name='topoext'/>
  </cpu>
  <clock offset='localtime'>
    <timer name='rtc' tickpolicy='catchup'/>
    <timer name='pit' tickpolicy='delay'/>
    <timer name='hpet' present='no'/>
    <timer name='hypervclock' present='yes'/>
  </clock>
  <on_poweroff>destroy</on_poweroff>
  <on_reboot>restart</on_reboot>
  <on_crash>destroy</on_crash>
  <pm>
    <suspend-to-mem enabled='no'/>
    <suspend-to-disk enabled='no'/>
  </pm>
  <devices>
    <emulator>/usr/bin/kvm</emulator>
    <disk type='file' device='disk'>
      <driver name='qemu' type='raw' io='threads'/>
      <source file='/var/lib/libvirt/images/win10-clean_backup.raw'/>
      <target dev='vda' bus='virtio'/>
      <boot order='2'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x07' function='0x0'/>
    </disk>
    <disk type='file' device='cdrom'>
      <driver name='qemu' type='raw'/>
      <source file='/var/lib/libvirt/images/virtio-win-0.1.160.iso'/>
      <target dev='sda' bus='sata'/>
      <readonly/>
      <address type='drive' controller='0' bus='0' target='0' unit='0'/>
    </disk>
    <controller type='pci' index='0' model='pci-root'/>
    <controller type='usb' index='0' model='nec-xhci'>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x05' function='0x0'/>
    </controller>
    <controller type='sata' index='0'>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x09' function='0x0'/>
    </controller>
    <interface type='network'>
      <mac address='52:54:00:39:d1:fc'/>
      <source network='default'/>
      <model type='virtio'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/>
    </interface>
    <input type='mouse' bus='ps2'/>
    <input type='keyboard' bus='ps2'/>
    <sound model='ich6'>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x06' function='0x0'/>
    </sound>
    <hostdev mode='subsystem' type='pci' managed='yes'>
      <source>
        <address domain='0x0000' bus='0x13' slot='0x00' function='0x0'/>
      </source>
      <rom bar='off'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x0a' function='0x0'/>
    </hostdev>
    <hostdev mode='subsystem' type='usb' managed='yes'>
      <source>
        <vendor id='0x046d'/>
        <product id='0xc24c'/>
        <address bus='3' device='7'/>
      </source>
      <address type='usb' bus='0' port='1'/>
    </hostdev>
    <hostdev mode='subsystem' type='usb' managed='yes'>
      <source>
        <vendor id='0x046d'/>
        <product id='0xc228'/>
        <address bus='3' device='9'/>
      </source>
      <address type='usb' bus='0' port='2'/>
    </hostdev>
    <memballoon model='virtio'>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x08' function='0x0'/>
    </memballoon>
  </devices>
  <qemu:commandline>
    <qemu:env name='QEMU_AUDIO_DRV' value='pa'/>
    <qemu:env name='QEMU_PA_SERVER' value='/run/user/1000/pulse/native'/>
  </qemu:commandline>
</domain>

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