Re: [PATCH 00/16] KVM: arm64: Support debug, SVE, MOPS, PIE/POE, FPMR and more in protected VMs

[Fuad Tabba]

Hi Oliver,

On Mon, 9 Nov 2026 at 20:20, Oliver Upton <oupton@xxxxxxxxxx> wrote:
[...]
> Ok, we really need to slow down the rate of patches here. I had already
> applied the SVE series locally and now we've got a grab-bag of CPU
> features in addition to what I was ready to apply.
>
> The whole point of respinning a series is so we can converge on the
> shape of the feature and get it merged. Adding a whole pile of things
> that wasn't asked for just muddies the context for us dumb humans and
> slows down the rate at which you're going to land things upstream.

I'm sorry. My intent was to make life easier by avoiding conflicts
within these series, but I see how it ended up having the opposite
effect.

The SVE patches in this series are unchanged from the SVE series [1],
so what you applied is still current, and the same goes for the debug
patch [2]. I'll hold off on the rest until you've had a chance to deal
with those two.

>
> Going forward, can you please:
>
>  - Keep an individual series focused on the original intent. Don't
>    unnecessarily expand scope.
>
>  - Only iterate on a couple of series on the list at a time. Sashiko
>    findings are interesting, but you're gonna have to draw a cutline in
>    terms of how many additional patches are going to ride the coattails
>    of any particular series.

Ack.

>    You're obviously a very active contributor and reviewer, so I don't
>    anticipate such a rate limit to actually impede your patch velocity.
>
> Sorry, I really do appreciate the amount of work that you're doing to
> get pKVM in good shape upstream. I just get the sense that Marc and I
> are going to quickly encounter bandwidth limitations.

I appreciate the work you both do. Other than being more careful with
my own patches, let me know if there's anything else I could help to
take work off your plate.

Cheers,
/fuad

[1] https://lore.kernel.org/all/20261105130456.1617185-1-fuad.tabba@xxxxxxxxx/
[2] https://lore.kernel.org/all/20261102093950.2922035-1-fuad.tabba@xxxxxxxxx/

> Thanks,
> Oliver