linux-kernel - Re: [PATCH v5 25/25] integrity/powerpc: Support loading keys from PLPKS

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Message-ID: <5fc51ed4-19fa-6116-0f8a-a67b7d746398@linux.ibm.com>
Date:   Tue, 31 Jan 2023 12:17:11 -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 25/25] integrity/powerpc: Support loading keys from
 PLPKS



On 1/31/23 01:39, Andrew Donnellan wrote:
> From: Russell Currey <ruscur@...sell.cc>
> 
> Add support for loading keys from the PLPKS on pseries machines, with the
> "ibm,plpks-sb-v1" format.
> 
> The object format is expected to be the same, so there shouldn't be any
> functional differences between objects retrieved on powernv or pseries.
> 
> Unlike on powernv, on pseries the format string isn't contained in the
> device tree. Use secvar_ops->format() to fetch the format string in a
> generic manner, rather than searching the device tree ourselves.
> 
> (The current code searches the device tree for a node compatible with
> "ibm,edk2-compat-v1". This patch switches to calling secvar_ops->format(),
> which in the case of OPAL/powernv means opal_secvar_format(), which
> searches the device tree for a node compatible with "ibm,secvar-backend"
> and checks its "format" property. These are equivalent, as skiboot creates
> a node with both "ibm,edk2-compat-v1" and "ibm,secvar-backend" as
> compatible strings.)
> 
> Signed-off-by: Russell Currey <ruscur@...sell.cc>
> Signed-off-by: Andrew Donnellan <ajd@...ux.ibm.com>

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