On Wed, Apr 15, 2015 at 10:26:52, Ian Campbell wrote:
> > We would like to use memaccess to perform (1) - but rather than
> > pausing the VCPU in (2), instead simply directly inject the
> > exception into the VCPU.
>
> That is, into the VCPUs whose permissions have been modified behind
> its back a
On Fri, Apr 10, 2015 at 17:03:26, Andrew Cooper wrote:
> Are you perhaps looking for something similar to Intel #VE support?
Yes, in that we want a way to notify a guest that it has made an access that
violated a stage-2 / EPT permission. However, for our purposes a trap into the
hypervisor foll
Hi Ian,
Thanks for your reply.
On Tue, Mar 10, 2015 at 16:22:40, Ian Campbell wrote:
>
> > What is the recommended way for the donor to transmit a batch of
> > grant references? I assume that this requires the donor to pack
> > references into an index page, grant foreign access to the index and
On Wed, Mar 11, 2015 at 10:54:25, Ian Campbell wrote:
> > > What sorts of batch sizes are you expecting to see in your use case?
> >
> > We need to share hundreds of MB, so (assuming a 4kB guest page size)
> > the batch size can be thousands of grant references.
>
> FWIW, the granularity of a gref
On Wed, Mar 11, 2015 at 10:24:48, Ian Campbell wrote:
> > I think this gives us two options for grant reference batch transmission:
> >
> > 1. Send the grant references via the ring buffer.
> > This doesn't require any additional allocations, but means that if
> > the number of grant references in
