Re: [PATCH v13 6/8] firmware: smccc: arm-cca-guest: Bind the TSM provider to an SMCCC device

[Suzuki K Poulose]

On 23/09/2026 15:04, 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 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.
>
> Reviewed-by: Jason Gunthorpe <jgg@xxxxxxxxxx>
> Reviewed-by: Jonathan Cameron <jonathan.cameron@xxxxxxxxxxxxxxxx>
> Reviewed-by: Catalin Marinas <catalin.marinas@xxxxxxx>
> Cc: Catalin Marinas <catalin.marinas@xxxxxxx>
> Cc: Will Deacon <will@xxxxxxxxxx>
> Cc: Mark Rutland <mark.rutland@xxxxxxx>
> Cc: Lorenzo Pieralisi <lpieralisi@xxxxxxxxxx>
> Cc: Sudeep Holla <sudeep.holla@xxxxxxxxxx>
> Signed-off-by: Aneesh Kumar K.V (Arm) <aneesh.kumar@xxxxxxxxxx>

Reviewed-by: Suzuki K Poulose <suzuki.poulose@xxxxxxx>