linux-kernel - Re: [PATCH v2 0/2] KVM: arm64: Support FF-A direct messaging interfaces

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Message-ID: <aQPKaDQkjkiKKP5G@e129823.arm.com>
Date: Thu, 30 Oct 2025 20:28:24 +0000
From: Yeoreum Yun <yeoreum.yun@....com>
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>,
	Will Deacon <will@...nel.org>, Ben Horgan <ben.horgan@....com>,
	Armelle Laine <armellel@...gle.com>,
	Sebastien Ene <sebastianene@...gle.com>,
	linux-arm-kernel@...ts.infradead.org, kvmarm@...ts.linux.dev,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 0/2] KVM: arm64: Support FF-A direct messaging
 interfaces


This series looks good to me

Reviewed-by: Yeoreum Yun <yeoreum.yun@....com>

> Support FFA_MSG_SEND_DIRECT_REQ unconditionally.
> Support FFA_MSG_SEND_DIRECT_REQ2 if hypervisor negotiated version 1.2+.
>
> The second patch was part of a previous patch set [0] but was dropped
> since the use case was unclear. A clear use case has now appeared [1].
>
> Tested by booting Android under QEMU.
>
> Best Regards,
> Per
>
> [0]: https://lore.kernel.org/all/20250730-virtio-msg-ffa-v9-0-7f1b55c8d149@google.com/
> [1]: https://lore.kernel.org/all/20251027191729.1704744-1-yeoreum.yun@arm.com/
>
>
> Signed-off-by: Per Larsen <perlarsen@...gle.com>
> ---
> Changes in v2:
> - 1/2: Drop support for FFA_ID_GET interface in host handler.
> - Link to v1: https://lore.kernel.org/r/20251030-host-direct-messages-v1-0-463e57871c8f@google.com
>
> ---
> Per Larsen (1):
>       KVM: arm64: Support FFA_MSG_SEND_DIRECT_REQ2 in host handler
>
> Sebastian Ene (1):
>       KVM: arm64: Support FFA_MSG_SEND_DIRECT_REQ in host handler
>
>  arch/arm64/kvm/hyp/nvhe/ffa.c | 20 ++++++++++++++++++++
>  1 file changed, 20 insertions(+)
> ---
> base-commit: e53642b87a4f4b03a8d7e5f8507fc3cd0c595ea6
> change-id: 20251029-host-direct-messages-5201d7f55abd
>
> Best regards,
> --
> Per Larsen <perlarsen@...gle.com>
>
>

--
Sincerely,
Yeoreum Yun