linux-kernel - Re: [PATCH v4 2/6] s390/uvdevice: Add 'Add Secret' UVC

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Date:   Wed, 7 Jun 2023 14:15:35 +0200
From:   Janosch Frank <frankja@...ux.ibm.com>
To:     Steffen Eiden <seiden@...ux.ibm.com>, kvm@...r.kernel.org,
        linux-s390@...r.kernel.org, linux-kernel@...r.kernel.org,
        Viktor Mihajlovski <mihajlov@...ux.ibm.com>
Cc:     Claudio Imbrenda <imbrenda@...ux.ibm.com>,
        Nico Boehr <nrb@...ux.ibm.com>,
        Christian Borntraeger <borntraeger@...ux.ibm.com>,
        Heiko Carstens <hca@...ux.ibm.com>,
        Hendrik Brueckner <brueckner@...ux.ibm.com>
Subject: Re: [PATCH v4 2/6] s390/uvdevice: Add 'Add Secret' UVC

On 6/6/23 20:08, Steffen Eiden wrote:
> Userspace can call the Add Secret Ultravisor Call using IOCTLs on the
> uvdevice. The Add Secret UV call sends an encrypted and
> cryptographically verified request to the Ultravisor. The request
> inserts a protected guest's secret into the Ultravisor for later use.
> 
> The uvdevice is merely transporting the request from userspace to the
> Ultravisor. It's neither checking nor manipulating the request data.
> 
> Signed-off-by: Steffen Eiden <seiden@...ux.ibm.com>

Reviewed-by: Janosch Frank <frankja@...ux.ibm.com>