[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: [Xen-devel] [PATCH 00/10] x86/hvm: pkeys, add memory protection-key support

>>> On 16.11.15 at 18:45, <andrew.cooper3@xxxxxxxxxx> wrote:
> Furthermore, it is unclear (given the unwritten ABI) whether it is even
> safe to move _PAGE_GNTTAB out of the way, as this is visible to a PV guest.

It seems pretty clear to me that this would be unsafe: It being
part of L1_DISALLOW_MASK, if it moved and a guest used the
bit for its own purposes, the guest would break. I guess we'll
need an ELF note by which the guest can advertise which of the
available bits it doesn't care about itself.


Xen-devel mailing list



Lists.xenproject.org is hosted with RackSpace, monitoring our
servers 24x7x365 and backed by RackSpace's Fanatical Support®.