linux-kernel - Re: [PATCH 2/2] arm64: Add support for SMCCC TRNG firmware interface

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Message-ID: <20201007104838.GA5030@sirena.org.uk>
Date:   Wed, 7 Oct 2020 11:48:38 +0100
From:   Mark Brown <broonie@...nel.org>
To:     Andre Przywara <andre.przywara@....com>
Cc:     Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Ard Biesheuvel <ardb@...nel.org>,
        Richard Henderson <richard.henderson@...aro.org>,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        Sudeep Holla <sudeep.holla@....com>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/2] arm64: Add support for SMCCC TRNG firmware interface

On Tue, Oct 06, 2020 at 09:18:08PM +0100, Andre Przywara wrote:
> The ARM architected TRNG firmware interface, described in ARM spec
> DEN0098[1], defines an ARM SMCCC based interface to a true random number
> generator, provided by firmware.
> This can be discovered via the SMCCC >=v1.1 interface, and provides
> up to 192 bits of entropy per call.

Reviewed-by: Mark Brown <broonie@...nel.org>

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