[vfio-users] Intel 520 Integrated Graphics Card Passthrough Issues
Roger Lawhorn
rll at twc.com
Tue Jun 30 19:06:29 UTC 2020
your mighty welcome
On 6/30/20 1:00 PM, Jeff Tchang wrote:
> Yay! Got it to work. My issue was that it wasn't in slot 0x02.
> I changed
> <address type="pci" domain="0x0000" bus="0x00" slot="0x08"
> function="0x0"/>
> to
> <address type="pci" domain="0x0000" bus="0x00" slot="0x02"
> function="0x0"/>
> .
>
> Thanks!
>
> Jeff
>
> On Tue, Jun 30, 2020 at 9:48 AM Jeff Tchang <jeff.tchang at gmail.com
> <mailto:jeff.tchang at gmail.com>> wrote:
>
>
> when you reach the desktop your video card will be handled by
> probably fbdev and you will be told that you are running in an
> unaccelerated video mode and things might be slow.
> this is why i used to use xfce4 for my desktop.
>
>
> I don't have a desktop since running in headless mode.
>
> it works faster faster with fbdev (fbdev is basically VESA
> mode from the days of DOS).
>
> make sure the integrated gpu is owned by the vfio-pci driver
> after booting.
> >lspci -nnk | grep -i vga -A 6
>
>
> # lspci -nnk | grep -i vga -A 6
>
> 00:02.0 *VGA*compatible controller [0300]: Intel Corporation
> Skylake GT2 [HD Graphics 520] [8086:1916] (rev 07)
>
> DeviceName:CPU
>
> Subsystem: Intel Corporation Skylake GT2 [HD Graphics 520] [8086:2063]
>
> Kernel driver in use: vfio-pci
>
> Kernel modules: i915
>
>
> Looks like it is loaded to me.
>
> # dmesg | grep -i vfio
>
> [0.000000] Command line: BOOT_IMAGE=/boot/vmlinuz-5.4.0-39-generic
> root=UUID=e7830f59-8c35-4d97-8315-6e3e93a4075f ro intel_iommu=on
> nomodeset nofb rd.driver.pre=*vfio*-pci video=efifb:off,vesafb:off
> simplefb=off modprobe.blacklist=i915 pcie_acs_override=downstream
> iommu=pt *vfio*-pci.ids=8086:1916
>
> [0.081894] Kernel command line:
> BOOT_IMAGE=/boot/vmlinuz-5.4.0-39-generic
> root=UUID=e7830f59-8c35-4d97-8315-6e3e93a4075f ro intel_iommu=on
> nomodeset nofb rd.driver.pre=*vfio*-pci video=efifb:off,vesafb:off
> simplefb=off modprobe.blacklist=i915 pcie_acs_override=downstream
> iommu=pt *vfio*-pci.ids=8086:1916
>
> [0.523948] *VFIO*- User Level meta-driver version: 0.3
>
> [0.524053] *vfio*-pci 0000:00:02.0: vgaarb: changed VGA decodes:
> olddecodes=io+mem,decodes=io+mem:owns=io+mem
>
> [0.542711] *vfio*_pci: add [8086:1916[ffffffff:ffffffff]] class
> 0x000000/00000000
>
> When starting the virtual machine the screen blanks and there is
> no signal. I see dmesg output as follows:
>
> [412.472468] DMAR: DRHD: handling fault status reg 2
>
> [412.472477] DMAR: [DMA Write] Request device [00:02.0] PASID
> ffffffff fault addr 0 [fault reason 02] Present bit in context
> entry is clear
>
> [412.472553] DMAR: DRHD: handling fault status reg 3
>
> [412.472557] DMAR: [DMA Read] Request device [00:02.0] PASID
> ffffffff fault addr 7c000000 [fault reason 06] PTE Read access is
> not set
>
> [412.472562] DMAR: DRHD: handling fault status reg 3
>
> [412.472566] DMAR: [DMA Read] Request device [00:02.0] PASID
> ffffffff fault addr 7c02a000 [fault reason 06] PTE Read access is
> not set
>
> [412.473623] DMAR: DRHD: handling fault status reg 3
>
> [412.933155] vfio-pci 0000:00:02.0: vfio_ecap_init: hiding ecap
> 0x1b at 0x100
>
>
> <domain type="kvm">
> <name>fedora-2</name>
> <uuid>3bc39504-8455-4156-b4a0-7f27e5d89ae1</uuid>
> <metadata>
> <libosinfo:libosinfo
> xmlns:libosinfo="http://libosinfo.org/xmlns/libvirt/domain/1.0">
> <libosinfo:os id="http://fedoraproject.org/fedora/unknown"/>
> </libosinfo:libosinfo>
> </metadata>
> <memory unit="KiB">2097152</memory>
> <currentMemory unit="KiB">2097152</currentMemory>
> <vcpu placement="static">2</vcpu>
> <os>
> <type arch="x86_64" machine="pc-i440fx-4.2">hvm</type>
> <boot dev="hd"/>
> </os>
> <features>
> <acpi/>
> <apic/>
> <vmport state="off"/>
> </features>
> <cpu mode="host-model" check="partial"/>
> <clock offset="utc">
> <timer name="rtc" tickpolicy="catchup"/>
> <timer name="pit" tickpolicy="delay"/>
> <timer name="hpet" present="no"/>
> </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/qemu-system-x86_64</emulator>
> <disk type="file" device="disk">
> <driver name="qemu" type="qcow2"/>
> <source file="/var/lib/libvirt/images/fedora-2.qcow2"/>
> <target dev="vda" bus="virtio"/>
> <address type="pci" domain="0x0000" bus="0x00" slot="0x07"
> function="0x0"/>
> </disk>
> <disk type="file" device="cdrom">
> <driver name="qemu" type="raw"/>
> <target dev="sda" bus="sata"/>
> <readonly/>
> <address type="drive" controller="0" bus="0" target="0"
> unit="0"/>
> </disk>
> <controller type="usb" index="0" model="qemu-xhci" ports="15">
> <address type="pci" domain="0x0000" bus="0x00" slot="0x04"
> function="0x0"/>
> </controller>
> <controller type="pci" index="0" model="pci-root"/>
> <controller type="sata" index="0">
> <address type="pci" domain="0x0000" bus="0x00" slot="0x05"
> function="0x0"/>
> </controller>
> <controller type="virtio-serial" index="0">
> <address type="pci" domain="0x0000" bus="0x00" slot="0x06"
> function="0x0"/>
> </controller>
> <interface type="network">
> <mac address="52:54:00:29:7f:c2"/>
> <source network="default"/>
> <model type="virtio"/>
> <address type="pci" domain="0x0000" bus="0x00" slot="0x02"
> function="0x0"/>
> </interface>
> <serial type="pty">
> <target type="isa-serial" port="0">
> <model name="isa-serial"/>
> </target>
> </serial>
> <console type="pty">
> <target type="serial" port="0"/>
> </console>
> <channel type="unix">
> <target type="virtio" name="org.qemu.guest_agent.0"/>
> <address type="virtio-serial" controller="0" bus="0" port="1"/>
> </channel>
> <channel type="spicevmc">
> <target type="virtio" name="com.redhat.spice.0"/>
> <address type="virtio-serial" controller="0" bus="0" port="2"/>
> </channel>
> <input type="tablet" bus="usb">
> <address type="usb" bus="0" port="1"/>
> </input>
> <input type="mouse" bus="ps2"/>
> <input type="keyboard" bus="ps2"/>
> <sound model="ich9">
> <address type="pci" domain="0x0000" bus="0x00" slot="0x03"
> function="0x0"/>
> </sound>
> <hostdev mode="subsystem" type="pci" managed="yes">
> <source>
> <address domain="0x0000" bus="0x00" slot="0x02"
> function="0x0"/>
> </source>
> <rom bar="on" file="IntelUHD520.bin"/>
> <address type="pci" domain="0x0000" bus="0x00" slot="0x08"
> function="0x0"/>
> </hostdev>
> <memballoon model="virtio">
> <address type="pci" domain="0x0000" bus="0x00" slot="0x09"
> function="0x0"/>
> </memballoon>
> <rng model="virtio">
> <backend model="random">/dev/urandom</backend>
> <address type="pci" domain="0x0000" bus="0x00" slot="0x0a"
> function="0x0"/>
> </rng>
> </devices>
> </domain>
>
>
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