linux-kernel - Re: [PATCH 1/2] misc: Add Nitro Secure Module driver

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Date:   Fri, 29 Sep 2023 07:44:04 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     Alexander Graf <graf@...zon.com>
Cc:     linux-crypto@...r.kernel.org, linux-kernel@...r.kernel.org,
        Arnd Bergmann <arnd@...db.de>,
        Herbert Xu <herbert@...dor.apana.org.au>,
        Olivia Mackall <olivia@...enic.com>,
        Petre Eftime <petre.eftime@...il.com>,
        Erdem Meydanlli <meydanli@...zon.nl>,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        David Woodhouse <dwmw@...zon.co.uk>,
        "Michael S . Tsirkin" <mst@...hat.com>,
        Jason Wang <jasowang@...hat.com>,
        Xuan Zhuo <xuanzhuo@...ux.alibaba.com>
Subject: Re: [PATCH 1/2] misc: Add Nitro Secure Module driver

On Thu, Sep 28, 2023 at 10:46:44PM +0000, Alexander Graf wrote:
> When running Linux inside a Nitro Enclave, the hypervisor provides a
> special virtio device called "NSM". This device has 2 main functions:
> 
>   1) Provide attestation reports
>   2) Modify PCR state
>   3) Provide entropy
> 
> This patch adds the core NSM driver that exposes a /dev/nsm device node
> which user space can use to request attestation documents and influence
> PCR states. A follow up patch will add a hwrng driver to feed its entropy
> into the kernel.
> 
> Originally-by: Petre Eftime <petre.eftime@...il.com>

Hasn't this been submitted a long time ago?  What changed from that
submission?  Or am I mis-remembering things?

> --- /dev/null
> +++ b/drivers/misc/nsm.c
> @@ -0,0 +1,470 @@
> +// SPDX-License-Identifier: GPL-2.0
> +/*
> + * Amazon Nitro Secure Module driver.
> + *
> + * Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
> + *
> + * This program is free software; you can redistribute it and/or modify it
> + * under the terms and conditions of the GNU General Public License,
> + * version 2, as published by the Free Software Foundation.
> + *
> + * This program is distributed in the hope that it will be useful,
> + * but WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
> + * GNU General Public License for more details.
> + *
> + * You should have received a copy of the GNU General Public License
> + * along with this program; if not, see <http://www.gnu.org/licenses/>.

Please drop the license "boiler-plate" text, the SPDX line is
sufficient.

thanks,

greg k-h