linux-kernel - Re: [PATCH v3 3/5] ARM: implement support for SMCCC TRNG entropy source

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Date:   Tue, 17 Nov 2020 22:10:36 +0100
From:   Linus Walleij <linus.walleij@...aro.org>
To:     Andre Przywara <andre.przywara@....com>
Cc:     Will Deacon <will@...nel.org>,
        Catalin Marinas <catalin.marinas@....com>,
        Ard Biesheuvel <ardb@...nel.org>,
        Russell King <linux@...linux.org.uk>,
        Marc Zyngier <maz@...nel.org>, "Theodore Ts'o" <tytso@....edu>,
        Sudeep Holla <sudeep.holla@....com>,
        Mark Rutland <mark.rutland@....com>,
        Mark Brown <broonie@...nel.org>,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>,
        kvmarm <kvmarm@...ts.cs.columbia.edu>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v3 3/5] ARM: implement support for SMCCC TRNG entropy source

On Fri, Nov 13, 2020 at 7:24 PM Andre Przywara <andre.przywara@....com> wrote:

> From: Ard Biesheuvel <ardb@...nel.org>
>
> Implement arch_get_random_seed_*() for ARM based on the firmware
> or hypervisor provided entropy source described in ARM DEN0098.
>
> This will make the kernel's random number generator consume entropy
> provided by this interface, at early boot, and periodically at
> runtime when reseeding.
>
> Cc: Linus Walleij <linus.walleij@...aro.org>
> Cc: Russell King <linux@...linux.org.uk>
> Signed-off-by: Ard Biesheuvel <ardb@...nel.org>
> [Andre: rework to be initialised by the SMCCC firmware driver]
> Signed-off-by: Andre Przywara <andre.przywara@....com>

Excellent idea,
Reviewed-by: Linus Walleij <linus.walleij@...aro.org>

Yours,
Linus Walleij