Re: [PATCH v10 7/7] coco: guest: arm64: Replace dummy CCA device with sysfs ABI

[Jason Gunthorpe]

On Fri, 04 Sep 2026 15:20:00 +0530, Aneesh Kumar K.V (Arm) <aneesh.kumar@xxxxxxxxxx> wrote:
> The SMCCC firmware driver now creates the arm-smccc platform device and
> instantiates the CCA RSI auxiliary devices once the RSI ABI is discovered.
> The arm64-specific arm-cca-dev platform device stub is therefore no longer
> needed.
> 
> However, userspace has used the arm-cca-dev platform device to detect Arm
> CCA Realm guests [1]. Removing it without a replacement would break that
> detection and would also leave userspace depending on kernel device-model
> details.
> 
> [...]

Reviewed-by: Jason Gunthorpe <jgg@xxxxxxxxxx>

-- 
Jason