Re: [PATCH PROTOTYPE 3/6] vfio: Implement support for sparse RAM memory regions

[David Hildenbrand]

On 20.10.20 22:44, Peter Xu wrote:
> On Tue, Oct 20, 2020 at 10:01:12PM +0200, David Hildenbrand wrote:
>> Thanks ... but I have an AMD system. Will try to find out how to get
>> that running with AMD :)

I just did some more testing with the oldish GPU I have for that
purpose. Seems to work, at least I get video output that keeps
on working - did not try advanced things yet.

I use
-device vfio-pci,host=05:00.0,x-vga=on
-device vfio-pci,host=05:00.1

when adding "-device intel-iommu", I got

"qemu-system-x86_64: -device vfio-pci,host=05:00.1: vfio 0000:05:00.1: group 23 
used in multiple address spaces"

... so I poked around the internet a bit and got it running with

-device intel-iommu,caching-mode=on \
-device pcie-pci-bridge,addr=1e.0,id=pci.1 \
-device vfio-pci,host=05:00.0,xvga=on,bus=pci.1,addr=1.0,multifunction=on \
-device vfio-pci,host=05:00.1,bus=pci.1,addr=1.1 \

Things still seem to be working, so I assume it works
(I guess ?!).

-- 
Thanks,

David / dhildenb