New: KVM - unhandled rdmsr - VFIO+Radeon R9 380, Win10 Guest

https://bugzilla.kernel.org/show_bug.cgi?id=118121

Bug ID: 118121
Summary: KVM - unhandled rdmsr - VFIO+Radeon R9 380, Win10
Guest
Product: Virtualization
Version: unspecified
Kernel Version: 4.5.x and below
Hardware: Intel
OS: Linux
Tree: Mainline
Status: NEW
Severity: normal
Priority: P1
Component: kvm
Assignee: [email protected]
Reporter: [email protected]
Regression: No

This only happens when attempting to run Just Cause 3, one of the most buggy games currently known to exist...

Host CPU : 4790K Devil's Canyon
VFIO GPU: Radeon R9 380

Guest OS: Win10 64

Other than the attached dmesg selection and the attached command I use to run the VM, I have seen no real issues so far as usage goes, the machine feels as good as bare metal.

I start the machine using:

qemu-system-x86_64 -enable-kvm -m 16384 -cpu host,kvm=off,hv_relaxed,hv_spinlocks=0x1fff,hv_vapic,hv_time \
-serial none \
-parallel none \
-nodefaults \
-nodefconfig \
-name Windows \
-soundhw hda \
-rtc base=localtime \
-vga none \
-net nic,macaddr=52:54:00:00:00:01,model=virtio,name=net0 \
-device vfio-pci,host=0000:01:00.0 \
-usb -usbdevice host:1532:0037 \
-usb -usbdevice host:2516:001a \
-net user \
-device virtio-scsi-pci,id=scsi \
-drive if=pflash,format=raw,readonly,file=/usr/share/edk2.git/ovmf-x64/OVMF_CODE-pure-efi.fd \
-drive if=pflash,format=raw,file=/tmp/my_vars.fd \
-drive file=/home/ili/vm/windoze.img,id=disk,format=raw,if=none,cache=none,if=virtio \
-drive file=/media/ili/vms/games.img,id=disk2,format=raw,if=none,cache=none,if=virtio

(Off topic: The only drawback is the reset issue I think many of us suffer, as I have to reboot the host machine if I power off the guest and want to start it back up at a later time. The interesting thing there is that I don't run into this with q35, but with my hardware configuration Windows doesn't play nice using Q35, it seems. I could just be missing a configuration setting there though.)

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https://bugzilla.kernel.org/show_bug.cgi?id=118121

--- Comment #1 from Matt Parnell <[email protected]> --- Created attachment 216111
--> https://bugzilla.kernel.org/attachment.cgi?id=216111&action=edit
dmesg output

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