linux-kernel - Re: [PATCH v2 1/1] s390: Add attestation query information

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Message-ID: <64567338-827d-75ac-f941-5f534db57182@linux.ibm.com>
Date:   Thu, 23 Jun 2022 08:26:49 +0200
From:   Janosch Frank <frankja@...ux.ibm.com>
To:     Steffen Eiden <seiden@...ux.ibm.com>
Cc:     borntraeger@...ux.ibm.com, hca@...ux.ibm.com,
        imbrenda@...ux.ibm.com, linux-kernel@...r.kernel.org,
        linux-s390@...r.kernel.org, nrb@...ux.ibm.com
Subject: Re: [PATCH v2 1/1] s390: Add attestation query information

On 6/1/22 12:02, Steffen Eiden wrote:
> By design the uv-device does not check whether an incoming attestation
> measurement request only specifies valid plain text flags or has the
> right request version, as these values are verified by the Ultravisor
> anyway. However, the userspace program that generates these requests
> might want to know which flags/versions are supported in order to
> create requests without trial and error. Therefore, expose the
> supported plain text flags and versions to userspace via sysfs.
> 
> Signed-off-by: Steffen Eiden <seiden@...ux.ibm.com>
> Reviewed-by: Janosch Frank <frankja@...ux.ibm.com
> Reviewed-by: Claudio Imbrenda <imbrenda@...ux.ibm.com>

Thanks, queued