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Subject: Re: VIRTIO - compatibility with different virtualization solutions
Ian Campbell <Ian.Campbell@citrix.com> writes: > On Wed, 2014-02-19 at 10:56 +1030, Rusty Russell wrote: >> For platforms using EPT, I don't think you want anything but guest >> addresses, do you? > > No, the arguments for preventing unfettered access by backends to > frontend RAM applies to EPT as well. I can see how you'd parse my sentence that way, I think, but the two are orthogonal. AFAICT your grant-table access restrictions are page granularity, though you don't use page-aligned data (eg. in xen-netfront). This level of access control is possible using the virtio ring too, but noone has implemented such a thing AFAIK. Hope that clarifies, Rusty. PS. Random aside: I greatly enjoyed your blog post on 'Xen on ARM and the Device Tree vs. ACPI debate'.