Hi Jens,
On 16/06/2022 23:37, Jens Wiklander wrote:
On Tue, Jun 14, 2022 at 07:47:18PM +0000, Volodymyr Babchuk wrote:
Hello Jens,
Sorry for late review, I was busy with internal projects.
This is preliminary review. I gave up at scatter-gather operations. Need
more time to review them properly.
No problem, thanks for taking the time.
One thing that bothers me is that Xen is non-preemptive and there are
plenty potentially long-running operations.
There's room to deal with that in the FF-A specification. These scatter
gather operation are quite complicated so I started with the minimum. We
can as a future optimization address the problem with long running
operations.
I would be OK to defer this work. However, I think this should be
written down as Xen community will not be able to security support until
we resolved the known places where a vCPU may hog pCPU longer than
necessary.
This reminds me that this series doesn't add a support statement for the
new subsystem in SUPPORT.md. AFAICT, this should be tech preview for now.
Cheers,
--
Julien Grall
