linux-kernel - Re: [RFC PATCH v3 2/5] KVM: arm64: Add support for PSCI v1.2 and v1.3

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Message-ID: <d71212e2514a9c4287b9f2eb32de43cb79a85a96.camel@infradead.org>
Date: Fri, 22 Mar 2024 16:14:53 +0000
From: David Woodhouse <dwmw2@...radead.org>
To: Marc Zyngier <maz@...nel.org>
Cc: linux-arm-kernel@...ts.infradead.org, kvm@...r.kernel.org, Paolo Bonzini
 <pbonzini@...hat.com>, Jonathan Corbet <corbet@....net>, Oliver Upton
 <oliver.upton@...ux.dev>, James Morse <james.morse@....com>, Suzuki K
 Poulose <suzuki.poulose@....com>, Zenghui Yu <yuzenghui@...wei.com>,
 Catalin Marinas <catalin.marinas@....com>, Will Deacon <will@...nel.org>,
 Mark Rutland <mark.rutland@....com>, Lorenzo Pieralisi
 <lpieralisi@...nel.org>, "Rafael J. Wysocki" <rafael@...nel.org>, Len Brown
 <len.brown@...el.com>, Pavel Machek <pavel@....cz>, Mostafa Saleh
 <smostafa@...gle.com>, Jean-Philippe Brucker <jean-philippe@...aro.org>, 
 linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org,
 kvmarm@...ts.linux.dev,  linux-pm@...r.kernel.org
Subject: Re: [RFC PATCH v3 2/5] KVM: arm64: Add support for PSCI v1.2 and
 v1.3

On Fri, 2024-03-22 at 16:05 +0000, Marc Zyngier wrote:
> 
> Consider making the visibility of v1.2/1.3 to userspace and guest the
> last patch in the series, so that there is no transient support for
> some oddball PSCI version with no feature (keeps bisection clean).

Ack. I think I can just reorder the patches and that will Just Work,
and the check for 'minor >= 3' will be tautologically false until the
later patch which adds v1.3 support for real. Will do that and test
that it does indeed build that way.

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