linux-kernel - Re: [PATCH 01/31] ntsync: Introduce the ntsync driver and character device.

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Date: Wed, 14 Feb 2024 17:57:23 -0800
From: Randy Dunlap <rdunlap@...radead.org>
To: Elizabeth Figura <zfigura@...eweavers.com>, Arnd Bergmann
 <arnd@...db.de>, Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
 Jonathan Corbet <corbet@....net>, Shuah Khan <shuah@...nel.org>
Cc: linux-kernel@...r.kernel.org, linux-api@...r.kernel.org,
 wine-devel@...ehq.org, André Almeida
 <andrealmeid@...lia.com>, Wolfram Sang <wsa@...nel.org>,
 Arkadiusz Hiler <ahiler@...eweavers.com>,
 Peter Zijlstra <peterz@...radead.org>, Andy Lutomirski <luto@...nel.org>,
 linux-doc@...r.kernel.org, linux-kselftest@...r.kernel.org
Subject: Re: [PATCH 01/31] ntsync: Introduce the ntsync driver and character
 device.

Hi,

On 2/14/24 15:36, Elizabeth Figura wrote:
> ntsync uses a misc device as the simplest and least intrusive uAPI interface.
> 
> Each file description on the device represents an isolated NT instance, intended
> to correspond to a single NT virtual machine.
> 
> Signed-off-by: Elizabeth Figura <zfigura@...eweavers.com>
> ---
>  drivers/misc/Kconfig  |  9 ++++++++
>  drivers/misc/Makefile |  1 +
>  drivers/misc/ntsync.c | 52 +++++++++++++++++++++++++++++++++++++++++++
>  3 files changed, 62 insertions(+)
>  create mode 100644 drivers/misc/ntsync.c
> 
> diff --git a/drivers/misc/Kconfig b/drivers/misc/Kconfig
> index 4fb291f0bf7c..bdd8a71bd853 100644
> --- a/drivers/misc/Kconfig
> +++ b/drivers/misc/Kconfig
> @@ -504,6 +504,15 @@ config OPEN_DICE
>  	  measured boot flow. Userspace can use CDIs for remote attestation
>  	  and sealing.
>  
> +config NTSYNC
> +	tristate "NT synchronization primitive emulation"
> +	help
> +	  This module provides kernel support for emulation of Windows NT
> +	  synchronization primitives. It is not a hardware driver.
> +
> +	  To compile this driver as a module, choose M here: the
> +	  module will be called ntsync.
> +
>  	  If unsure, say N.

It looks like the "If unsure" line belongs to the OPEN_DICE kconfig entry
above here. If you want one for NTSYNC, please add one.

>  
>  config VCPU_STALL_DETECTOR

> diff --git a/drivers/misc/ntsync.c b/drivers/misc/ntsync.c
> new file mode 100644
> index 000000000000..e4969ef90722
> --- /dev/null
> +++ b/drivers/misc/ntsync.c
> @@ -0,0 +1,52 @@
> +// SPDX-License-Identifier: GPL-2.0-only
> +/*
> + * ntsync.c - Kernel driver for NT synchronization primitives
> + *
> + * Copyright (C) 2024 Elizabeth Figura

It would be nice to have your email address above...

> + */
> +

> +
> +MODULE_AUTHOR("Elizabeth Figura");

but at least please add it in MODULE_AUTHOR(). Yes it's optional, but
roughly 7900 of 10400 entries do include it (according to my rough
grepping).

Yes, I know that it's in MAINTAINERS.

> +MODULE_DESCRIPTION("Kernel driver for NT synchronization primitives");
> +MODULE_LICENSE("GPL");

thanks.
-- 
#Randy