From: Catalin Marinas <catalin.marinas@arm•com>
To: "Aneesh Kumar K.V (Arm)" <aneesh.kumar@kernel•org>
Cc: linux-kernel@vger•kernel.org,
linux-arm-kernel@lists•infradead.org,
Greg KH <gregkh@linuxfoundation•org>,
Jeremy Linton <jeremy.linton@arm•com>,
Jonathan Cameron <jic23@kernel•org>,
Lorenzo Pieralisi <lpieralisi@kernel•org>,
Mark Rutland <mark.rutland@arm•com>,
Sudeep Holla <sudeep.holla@arm•com>,
Will Deacon <will@kernel•org>,
Jonathan Cameron <jonathan.cameron@huawei•com>,
Suzuki K Poulose <Suzuki.Poulose@arm•com>
Subject: Re: [PATCH v4 2/2] coco: guest: arm64: Drop dummy RSI platform device stub
Date: Tue, 12 May 2026 15:38:14 +0100 [thread overview]
Message-ID: <agM7VmoQ--ylUmyM@arm.com> (raw)
In-Reply-To: <20260427061615.905018-3-aneesh.kumar@kernel.org>
+ Suzuki again
On Mon, Apr 27, 2026 at 11:46:15AM +0530, Aneesh Kumar K.V (Arm) wrote:
> The SMCCC firmware driver now creates the `arm-smccc` platform device
> and also creates the CCA auxiliary devices once the RSI ABI is
> discovered. This makes the arch-specific arm64_create_dummy_rsi_dev()
> helper redundant. Remove the arm-cca-dev platform device registration
> and let the SMCCC probe manage the RSI device.
>
> systemd match on platform:arm-cca-dev for confidential vm detection [1].
> Losing the platform device registration can break that. Keeping this
> removal in its own change makes it easy to revert if that regression
> blocks the rollout.
>
> [1] https://lore.kernel.org/all/4a7d84b2-2ec4-4773-a2d5-7b63d5c683cf@arm.com
I wouldn't merge this now given that systemd checks this file. Could we
have a symbolic link instead for some time until systemd eventually gets
updated (years?).
--
Catalin
next prev parent reply other threads:[~2026-05-12 14:38 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-04-27 6:16 [PATCH v4 0/2] Switch Arm CCA to use an auxiliary device instead of a platform device Aneesh Kumar K.V (Arm)
2026-04-27 6:16 ` [PATCH v4 1/2] firmware: smccc: coco: Manage arm-smccc platform device and CCA auxiliary drivers Aneesh Kumar K.V (Arm)
2026-05-12 14:36 ` Catalin Marinas
2026-05-13 6:56 ` Aneesh Kumar K.V
2026-05-13 10:47 ` Catalin Marinas
2026-04-27 6:16 ` [PATCH v4 2/2] coco: guest: arm64: Drop dummy RSI platform device stub Aneesh Kumar K.V (Arm)
2026-05-12 14:38 ` Catalin Marinas [this message]
2026-05-13 6:58 ` Aneesh Kumar K.V
2026-05-13 7:11 ` Greg KH
2026-05-13 8:53 ` Aneesh Kumar K.V
2026-05-13 9:51 ` Aneesh Kumar K.V
2026-05-13 9:59 ` Greg KH
2026-05-13 16:53 ` Aneesh Kumar K.V
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