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Re: [Xen-devel] about fully UMIP support in Xen





On 4/20/2017 6:23 PM, Andrew Cooper wrote:
On 20/04/17 11:10, Yu Zhang wrote:

On 4/20/2017 6:01 PM, Jan Beulich wrote:
On 20.04.17 at 11:53, <yu.c.zhang@xxxxxxxxxxxxxxx> wrote:
On 4/20/2017 5:47 PM, Jan Beulich wrote:
On 20.04.17 at 09:15, <yu.c.zhang@xxxxxxxxxxxxxxx> wrote:
And back to the schedule of this feature, are you working on it?
Or any
specific plan?
Well, the HVM side is basically ready (as said, the single hunk needed
to support UMIP when hardware supports it could be easily split off of
my emulation patch). For the PV side I don't currently have any plans
to do any work.
Thanks, Jan. So do you have plan to push the HVM support in Xen 4.10?
We're moving in circles, it feels. My patch depends on Andrew
making progress. Breaking out the one mentioned hunk could
of course be done at any time, if we have indication that UMIP
hardware support will actually arrive and it becomes unlikely
for the patch to be able to go in as a whole in time for 4.10.
I can understand. And please let me know if there's any help we can
offer here in Intel. :-)
I have no immediate plans to do any UMIP work, again because I lack any
hardware to suitably test it on.

If Intel have time, exposing hardware UMIP support to HVM guests would
be useful work, and hopefully trivial to do.  (Ideally with an XTF
regression test.)

Got it. We have simics to emulate the new cpu platform. So we can take over this part. As to the PV support, I'm not sure if we have time to do so in the short time, but it's not
urgent for us. :)

Yu


~Andrew


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