Re: Using EPT to map guest MMIO to host MMIO

Jan Kiszka
2011-08-05T07:41:26Z

On 2011-08-05 09:20, Cyclonus J wrote:
> hi,
>
> I am wondering if it is possible to map guest MMIO to host MMIO, the
> purpose is to reduce VM_EXIT as the page tables will be setup before
> MMIO accessing from guest. Here is what I have in mind:

This is already the case if you pass through devices AND aligment&size
of the MMIO resource allows this.

What MMIOs do you see that are not mapped 1:1? For what kind of devices?

Jan

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