linux-kernel - Re: [PATCH v7] misc: Add Nitro Secure Module driver

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Message-ID: <20231225090044-mutt-send-email-mst@kernel.org>
Date: Mon, 25 Dec 2023 09:06:17 -0500
From: "Michael S. Tsirkin" <mst@...hat.com>
To: Alexander Graf <graf@...zon.com>
Cc: linux-kernel@...r.kernel.org, linux-crypto@...r.kernel.org,
	Arnd Bergmann <arnd@...db.de>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	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>,
	Jason Wang <jasowang@...hat.com>,
	Xuan Zhuo <xuanzhuo@...ux.alibaba.com>,
	Christophe JAILLET <christophe.jaillet@...adoo.fr>
Subject: Re: [PATCH v7] misc: Add Nitro Secure Module driver

On Wed, Oct 11, 2023 at 09:35:22PM +0000, Alexander Graf wrote:
> When running Linux inside a Nitro Enclave, the hypervisor provides a
> special virtio device called "Nitro Security Module" (NSM). This device
> has 3 main functions:
> 
>   1) Provide attestation reports
>   2) Modify PCR state
>   3) Provide entropy
> 
> This patch adds a driver for NSM that exposes a /dev/nsm device node which
> user space can issue an ioctl on this device with raw NSM CBOR formatted
> commands to request attestation documents, influence PCR states, read
> entropy and enumerate status of the device. In addition, the driver
> implements a hwrng backend.
> 
> Originally-by: Petre Eftime <petre.eftime@...il.com>
> Signed-off-by: Alexander Graf <graf@...zon.com>

Alex are you going to publish the spec patch for this device?  Important
so we don't need to guess at behaviour when e.g.  making changes to
virtio APIs.  Also, which tree do you want this to go through?

-- 
MST