Re: [RFC PATCH v1 0/8] Arm Core Local Accelerator Driver

[Marc Zyngier]

On Fri, 17 Jul 2026 13:33:07 +0100,
Ryan Roberts <ryan.roberts@xxxxxxx> wrote:
> 
> On 17/07/2026 13:09, Marc Zyngier wrote:
> > Thanks Will for roping me in.
> 
> Sorry - I intentionally didn't include you because last time we spoke you said
> you were only really interested in discussions on the virt side of things and I
> didn't want to spam your inbox. Perhaps the wrong decision...

I'm indeed mostly interested in the impacts on the KVM side. However,
a lot of the decisions that you make on the non-virt side of the
kernel have a two-pronged effect:

- both memory management and scheduling changes have a direct impact
  on KVM because of the intricate weaving of KVM's own MM with the
  kernel's.

- most of the requirements that you define for bare-metal will have to
  be enforced by KVM, because it is not conceivable that you'd have a
  different behaviour between host and guest.

For these reasons, I think it is necessary to involve KVM reviewers
from the beginning, rather than after everything has already been set
in stone. Unless you say upfront that virtualisation of CLA will never
be supported. And even then, you'd have to look into the effects of a
CLA user also being a VMM...

And please don't worry about my Inbox ;-).

Thanks,

	M.

-- 
Jazz isn't dead. It just smells funny.