Re: [PATCH v10 7/7] coco: guest: arm64: Replace dummy CCA device with sysfs ABI
From: Jason Gunthorpe <jgg@nvidia.com>
Date: 2026-09-04 19:40:19
Also in:
linux-coco, lkml
On Fri, 04 Sep 2026 15:20:00 +0530, Aneesh Kumar K.V (Arm) [off-list ref] 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@nvidia.com> -- Jason