linux-kernel - Re: [PATCH 12/12] ANDROID: KVM: arm64: pkvm: Add support for fragmented FF-A descriptors

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Message-ID: <Y3UYpGBlU1W62Mfz@google.com>
Date:   Wed, 16 Nov 2022 17:06:44 +0000
From:   Quentin Perret <qperret@...gle.com>
To:     Marc Zyngier <maz@...nel.org>, James Morse <james.morse@....com>,
        Alexandru Elisei <alexandru.elisei@....com>,
        Suzuki K Poulose <suzuki.poulose@....com>,
        Oliver Upton <oliver.upton@...ux.dev>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will@...nel.org>,
        Sudeep Holla <sudeep.holla@....com>,
        Andrew Walbran <qwandor@...gle.com>
Cc:     linux-arm-kernel@...ts.infradead.org, kvmarm@...ts.linux.dev,
        kvmarm@...ts.cs.columbia.edu, linux-kernel@...r.kernel.org,
        kernel-team@...roid.com
Subject: Re: [PATCH 12/12] ANDROID: KVM: arm64: pkvm: Add support for
 fragmented FF-A descriptors

On Wednesday 16 Nov 2022 at 17:03:35 (+0000), Quentin Perret wrote:
> FF-A memory descriptors may need to be sent in fragments when they don't
> fit in the mailboxes. Doing so involves using the FRAG_TX and FRAG_RX
> primitives defined in the FF-A protocol.
> 
> Add support in the pKVM FF-A relayer for fragmented descriptors by
> monitoring outgoing FRAG_TX transactions and by buffering large
> descriptors on the reclaim path.

And it seems that I have forgotten to remove the ANDROID: tag from this
patch prior to posting ... Please ignore, it'll be gone in v2.

Cheers,
Quentin