linux-kernel - Re: [PATCH v27 12/12] LRNG - add power-on and runtime self-tests

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Date:   Thu, 9 Jan 2020 16:22:51 -0800
From:   Randy Dunlap <rdunlap@...radead.org>
To:     Stephan Müller <smueller@...onox.de>,
        Arnd Bergmann <arnd@...db.de>
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        linux-crypto@...r.kernel.org, LKML <linux-kernel@...r.kernel.org>,
        linux-api@...r.kernel.org,
        "Eric W. Biederman" <ebiederm@...ssion.com>,
        "Alexander E. Patrakov" <patrakov@...il.com>,
        "Ahmed S. Darwish" <darwish.07@...il.com>,
        "Theodore Y. Ts'o" <tytso@....edu>, Willy Tarreau <w@....eu>,
        Matthew Garrett <mjg59@...f.ucam.org>,
        Vito Caputo <vcaputo@...garu.com>,
        Andreas Dilger <adilger.kernel@...ger.ca>,
        Jan Kara <jack@...e.cz>, Ray Strode <rstrode@...hat.com>,
        William Jon McCann <mccann@....edu>,
        zhangjs <zachary@...shancloud.com>,
        Andy Lutomirski <luto@...nel.org>,
        Florian Weimer <fweimer@...hat.com>,
        Lennart Poettering <mzxreary@...inter.de>,
        Nicolai Stange <nstange@...e.de>,
        "Peter, Matthias" <matthias.peter@....bund.de>,
        Marcelo Henrique Cerri <marcelo.cerri@...onical.com>,
        Roman Drahtmueller <draht@...altsekun.de>,
        Neil Horman <nhorman@...hat.com>,
        Julia Lawall <julia.lawall@...ia.fr>
Subject: Re: [PATCH v27 12/12] LRNG - add power-on and runtime self-tests

Hi,

On 1/9/20 12:35 AM, Stephan Müller wrote:

> ---
>  drivers/char/lrng/Kconfig         |  25 ++
>  drivers/char/lrng/Makefile        |   1 +
>  drivers/char/lrng/lrng_selftest.c | 418 ++++++++++++++++++++++++++++++
>  3 files changed, 444 insertions(+)
>  create mode 100644 drivers/char/lrng/lrng_selftest.c
> 
> diff --git a/drivers/char/lrng/Kconfig b/drivers/char/lrng/Kconfig
> index 394066aa5a86..e9827e7df715 100644
> --- a/drivers/char/lrng/Kconfig
> +++ b/drivers/char/lrng/Kconfig
> @@ -175,4 +175,29 @@ config LRNG_TESTING
>  
>  	  If unsure, say N.
>  
> +config LRNG_SELFTEST
> +	bool "Enable power-on and on-demand self-tests"
> +	help
> +	  The power-on self tests are executed during boot time

	               self-tests

> +	  covering the ChaCha20 DRNG, the LFSR processing and the
> +	  time stamp management of the LRNG.
> +
> +	  The on-demand self-tests are triggered by writing any
> +	  value into the SysFS file selftest_status. At the same
> +	  time, when reading this file, the test status is
> +	  returned. A zero indicates that all tests were executed
> +	  successfully.
> +
> +	  If unsure, say Y.
> +
> +if LRNG_SELFTEST
> +
> +config LRNG_SELFTEST_PANIC
> +	bool "Panic the kernel upon self-test failure"
> +	help
> +	  If the option is enabled, the kernel is terminated if an
> +	  LRNG power-on self-test failure is detected.
> +
> +endif # LRNG_SELFTEST
> +
>  endif # LRNG


-- 
~Randy