[libvirt] [PATCH 0/3] sample: vfio mdev display devices.
Paolo Bonzini
pbonzini at redhat.com
Thu Apr 19 14:54:23 UTC 2018
On 19/04/2018 10:40, Gerd Hoffmann wrote:
>> So I was ready to return and suggest that maybe libvirt should probe
>> the device to know about these ancillary configuration details, but
>> then I remembered that both mdev vGPU vendors had external dependencies
>> to even allow probing the device. KVMGT will fail to open the device
>> if it's not associated with an instance of KVM and NVIDIA vGPU, I
>> believe, will fail if the vGPU manager process cannot find the QEMU
>> instance to extract the VM UUID. (Both of these were bad ideas)
> Oops. I've trapped into the kvm issue too. Wondering what the reason
> is, shouldn't this work with tcg too?
As far as I understand, KVMGT requires KVM support in order to track
writes to guest memory. It's a kernel API provided by the kvm.ko
module, so no TCG support.
Paolo
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