From: Catalin Marinas <catalin.marinas@arm.com>
To: "Aneesh Kumar K.V (Arm)" <aneesh.kumar@kernel.org>
Cc: linux-coco@lists.linux.dev, linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org, Jason Gunthorpe <jgg@nvidia.com>,
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>,
Steven Price <steven.price@arm.com>,
Suzuki K Poulose <Suzuki.Poulose@arm.com>,
Andre Przywara <andre.przywara@arm.com>
Subject: Re: [PATCH v11 6/7] firmware: smccc: arm-cca-guest: Bind the TSM provider to an SMCCC device
Date: Mon, 14 Sep 2026 14:42:51 +0100 [thread overview]
Message-ID: <aqf524L399WhJ2XV@arm.com> (raw)
In-Reply-To: <20260914060511.277948-7-aneesh.kumar@kernel.org>
On Mon, Sep 14, 2026 at 11:35:10AM +0530, Aneesh Kumar K.V (Arm) wrote:
> The Arm CCA guest TSM provider currently binds through the arm-cca-dev
> platform device. Like arm-smccc-trng, this device is not an independent
> platform resource; it is a software representation of the RSI firmware
> service discovered through SMCCC.
>
> Move RSI discovery into the SMCCC firmware driver. When the SMCCC conduit
> is SMC and if RSI ABI version call is supported, create an arm-rsi-dev
Nit: "arm-rsi". Or did you mean to actually user "arm-rsi-dev" below?
> SMCCC device. Convert the Arm CCA guest TSM provider to an SMCCC driver so
> it binds to that discovered RSI service and keeps module autoloading
> through the SMCCC device id table.
>
> Keep the old arm-cca-dev platform-device registration for now. Userspace
> has used that device as a Realm-guest indicator, so removing it is left to
> a follow-up patch that adds a replacement sysfs ABI.
>
> Signed-off-by: Aneesh Kumar K.V (Arm) <aneesh.kumar@kernel.org>
[...]
> @@ -94,6 +95,11 @@ static const struct smccc_device_info smccc_devices[] __initconst = {
> .requires_smc = false,
> .device_name = "arm-smccc-trng",
> },
> + {
> + .func_id = SMC_RSI_ABI_VERSION,
> + .requires_smc = true,
> + .device_name = "arm-rsi",
> + },
> };
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
next prev parent reply other threads:[~2026-09-14 13:43 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-09-14 6:05 [PATCH v11 0/7] Switch Arm SMCCC firmware services to an SMCCC bus Aneesh Kumar K.V (Arm)
2026-09-14 6:05 ` [PATCH v11 1/7] firmware: smccc: Add an Arm " Aneesh Kumar K.V (Arm)
2026-09-14 13:03 ` Catalin Marinas
2026-09-14 6:05 ` [PATCH v11 2/7] firmware: hwrng: arm_smccc_trng: Register as an SMCCC device Aneesh Kumar K.V (Arm)
2026-09-14 13:14 ` Catalin Marinas
2026-09-14 6:05 ` [PATCH v11 3/7] firmware: arm_rmm: Move RSI support out of arch/arm64 Aneesh Kumar K.V (Arm)
2026-09-14 13:18 ` Catalin Marinas
2026-09-14 6:05 ` [PATCH v11 4/7] arm64: realm: Move Realm memory encryption ops to RSI code Aneesh Kumar K.V (Arm)
2026-09-14 13:20 ` Catalin Marinas
2026-09-14 14:50 ` Suzuki K Poulose
2026-09-14 6:05 ` [PATCH v11 5/7] virt: coco: arm-cca-guest: Rename TSM report source file Aneesh Kumar K.V (Arm)
2026-09-14 13:23 ` Catalin Marinas
2026-09-14 15:06 ` Suzuki K Poulose
2026-09-14 6:05 ` [PATCH v11 6/7] firmware: smccc: arm-cca-guest: Bind the TSM provider to an SMCCC device Aneesh Kumar K.V (Arm)
2026-09-14 13:42 ` Catalin Marinas [this message]
2026-09-14 6:05 ` [PATCH v11 7/7] coco: guest: arm64: Replace dummy CCA device with sysfs ABI Aneesh Kumar K.V (Arm)
2026-09-14 13:48 ` Catalin Marinas
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