On 02/03/18 16:18, Jan Beulich wrote:
On 02.03.18 at 17:04, <andrew.coop...@citrix.com> wrote:
The proper way to do this is indeed by a nominated (guest) physical
address, at which point Xen can make all/any updates at times of its
choosing, and the guests pagetable/permissions state at an instantaneous
moment don't matter.
If you've got time to do this, then please do. It will be a definite
Just to be avoid unnecessary effort in the wrong direction: I don't
think you can alter the current interface. You'd have to add a new
one, and we could then deprecate (but never abandon) the current
I was only planning to store the guest physical address rather than the
virtual address as we do today. Is that considered as an alteration of
the current interface?
In other words, the current version (e.g store virtual address) is just
broken and going to be worst with KPTI kernel. I can't see how this
could ever work properly on OS with different set of page-tables.
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