[PATCH v5 17/25] powerpc/pseries: Implement signed update for PLPKS objects

[Stefan Berger]

On 1/31/23 01:39, Andrew Donnellan wrote:
> From: Nayna Jain <nayna at linux.ibm.com>
> 
> The Platform Keystore provides a signed update interface which can be used
> to create, replace or append to certain variables in the PKS in a secure
> fashion, with the hypervisor requiring that the update be signed using the
> Platform Key.
> 
> Implement an interface to the H_PKS_SIGNED_UPDATE hcall in the plpks
> driver to allow signed updates to PKS objects.
> 
> (The plpks driver doesn't need to do any cryptography or otherwise handle
> the actual signed variable contents - that will be handled by userspace
> tooling.)
> 
> Signed-off-by: Nayna Jain <nayna at linux.ibm.com>
> [ajd: split patch, add timeout handling and misc cleanups]
> Co-developed-by: Andrew Donnellan <ajd at linux.ibm.com>
> Signed-off-by: Andrew Donnellan <ajd at linux.ibm.com>
> Signed-off-by: Russell Currey <ruscur at russell.cc>

Reviewed-by: Stefan Berger <stefanb at linux.ibm.com>