[virtio-dev] Re: [virtio-comment] [PATCH 5/5] virtio-pci: implement VIRTIO_F_QUEUE_STATE

Jason Wang
2023-09-14T03:12:09Z

On Wed, Sep 13, 2023 at 4:28 PM Michael S. Tsirkin <mst@redhat.com> wrote:
>
> On Wed, Sep 13, 2023 at 12:45:21PM +0800, Jason Wang wrote:
> > For example, KVM doesn't use
> > hardware to log dirty pages.
>
> It uses a mix of PML, PTE bit and EPT write protection.

Well EPT/PML is Intel specific, the minimal requirement is page fault.
The logging is done by software anyhow.

Virtio can choose to go device page fault for sure.

Thanks

>
> --
> MST