linux-kernel - Re: [RFC PATCH] kvm: nv: Optimize the unmapping of shadow S2-MMU tables.

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Message-ID: <86plw71o41.wl-maz@kernel.org>
Date: Wed, 06 Mar 2024 13:33:34 +0000
From: Marc Zyngier <maz@...nel.org>
To: Ganapatrao Kulkarni <gankulkarni@...amperecomputing.com>
Cc: Oliver Upton <oliver.upton@...ux.dev>,
	kvmarm@...ts.linux.dev,
	kvm@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org,
	darren@...amperecomputing.com,
	d.scott.phillips@...erecomputing.com,
	James Morse <james.morse@....com>,
	Suzuki K Poulose <suzuki.poulose@....com>,
	Zenghui Yu <yuzenghui@...wei.com>
Subject: Re: [RFC PATCH] kvm: nv: Optimize the unmapping of shadow S2-MMU tables.

On Wed, 06 Mar 2024 05:31:09 +0000,
Ganapatrao Kulkarni <gankulkarni@...amperecomputing.com> wrote:
> 
> 
> 
> On 05-03-2024 02:16 pm, Oliver Upton wrote:
> > -cc old kvmarm list
> > +cc new kvmarm list, reviewers
> > 
> > Please run scripts/get_maintainer.pl next time around so we get the
> > right people looking at a patch.
> > 
> 
> Of course I know this script -:)
> I didn't cc since I felt to avoid unnecessary overloading someone's
> inbox. I don't think anyone(even ARM) is interested in this feature
> other than Marc and me/Ampere. Otherwise this would have merged
> upstream by now.

You're wrong on a lot of this. There is quite a significant interest,
actually. But in the fine corporate tradition, not even my employer
can be bothered to actively contribute. These people are waiting for
things to land. I'm happy to make them wait even longer (I'm paying
for my own HW, so I don't owe anyone anything).

The architecture also wasn't in a good enough state for the support to
be merged until very recently, and it still is broken in a lot of
respects.

> BTW, NV feature development started way back in 2016/17.

And? Cc'ing individuals and lists is basic courtesy, I'm afraid.
Please don't leave people in the dark.

Thanks,

	M.

-- 
Without deviation from the norm, progress is not possible.