linux-kernel - Re: [PATCH v8 4/7] KVM: arm64: Mark optional FF-A 1.2 interfaces as unsupported

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Message-ID: <aIjstHFfEoSqEy0F@willie-the-truck>
Date: Tue, 29 Jul 2025 16:45:56 +0100
From: Will Deacon <will@...nel.org>
To: perlarsen@...gle.com
Cc: Marc Zyngier <maz@...nel.org>, Oliver Upton <oliver.upton@...ux.dev>,
	Joey Gouly <joey.gouly@....com>,
	Suzuki K Poulose <suzuki.poulose@....com>,
	Zenghui Yu <yuzenghui@...wei.com>,
	Catalin Marinas <catalin.marinas@....com>,
	Sudeep Holla <sudeep.holla@....com>,
	linux-arm-kernel@...ts.infradead.org, kvmarm@...ts.linux.dev,
	linux-kernel@...r.kernel.org, ahomescu@...gle.com,
	armellel@...gle.com, arve@...roid.com, ayrton@...gle.com,
	qperret@...gle.com, sebastianene@...gle.com, qwandor@...gle.com
Subject: Re: [PATCH v8 4/7] KVM: arm64: Mark optional FF-A 1.2 interfaces as
 unsupported

On Sat, Jul 19, 2025 at 02:11:26AM +0000, Per Larsen via B4 Relay wrote:
> From: Per Larsen <perlarsen@...gle.com>
> 
> Update ffa_call_supported to mark FF-A 1.2 interfaces as unsupported
> lest they get forwarded. FFA_MSG_SEND_DIRECT_REQ2 is not marked as
> unsupported because a later patch in this series adds support.

Please add it as unsupported as well. Then the subsequent patch which
adds support can remove it again, that way the series is bisectable and
if (for some reason) only this patch gets backported then it won't
cause any problems.

Will