Re: [virtio-dev] How to register virtio MMIO device registers with KVM

[Paolo Bonzini <pbonzini@redhat.com>]

On 07/03/21 21:57, Peter Okelmann wrote:
> Hi,
>
> i'm looking into virtio over MMIO. How does KVM know which guest memory
> region contains MMIO device registers?
> As i understand KVM exits the VM with KVM_EXIT_MMIO when MMIO memory is
> accessed and for that it should know where it is.

Anything that isn't RAM (which is registered with 
KVM_SET_USER_MEMORY_REGION) will cause KVM_EXIT_MMIO.

That said, this is not in topic for this mailing list.

Paolo