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

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Date:   Tue, 31 Jan 2023 11:30:48 -0500
From:   Stefan Berger <stefanb@...ux.ibm.com>
To:     Andrew Donnellan <ajd@...ux.ibm.com>,
        linuxppc-dev@...ts.ozlabs.org, linux-integrity@...r.kernel.org
Cc:     ruscur@...sell.cc, bgray@...ux.ibm.com, nayna@...ux.ibm.com,
        gcwilson@...ux.ibm.com, gjoyce@...ux.ibm.com, brking@...ux.ibm.com,
        sudhakar@...ux.ibm.com, erichte@...ux.ibm.com,
        gregkh@...uxfoundation.org, linux-kernel@...r.kernel.org,
        zohar@...ux.ibm.com, joel@....id.au, npiggin@...il.com
Subject: Re: [PATCH v5 17/25] powerpc/pseries: Implement signed update for
 PLPKS objects



On 1/31/23 01:39, Andrew Donnellan wrote:
> From: Nayna Jain <nayna@...ux.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@...ux.ibm.com>
> [ajd: split patch, add timeout handling and misc cleanups]
> Co-developed-by: Andrew Donnellan <ajd@...ux.ibm.com>
> Signed-off-by: Andrew Donnellan <ajd@...ux.ibm.com>
> Signed-off-by: Russell Currey <ruscur@...sell.cc>

Reviewed-by: Stefan Berger <stefanb@...ux.ibm.com>