Re: [PATCH 1/5] drivers: security: Add security devices to driver model

Hi Sean,

On Fri, 11 Aug 2023 at 18:28, seanedmond@linux.microsoft.com wrote:

From: Stephen Carlson stcarlso@linux.microsoft.com

Security devices currently implement operations to store an OS anti-rollback monotonic counter. Existing devices such as the Trusted Platform Module (TPM) already support this operation, but this uclass provides abstraction for current and future devices that may support different features.

• New Driver Model uclass UCLASS_SECURITY.
• New config CONFIG_DM_SECURITY to enable security device support.
• New driver sandbox_security matching "security,sandbox", enabled with new config CONFIG_SECURITY_SANDBOX.

How about calling this UCLASS_ROLLBACK and implementing that function?

Then you can add this device as a child of a TPM and the TPM can implement the API.

Regards, Simon