linux-kernel - Re: [PATCH 3/3] ARM: dts: bcm2711: Enable HWRNG support

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <3209f601ad0537a7ef01e2a752f022ccf8816210.camel@suse.de>
Date:   Mon, 18 Nov 2019 12:44:59 +0100
From:   Nicolas Saenz Julienne <nsaenzjulienne@...e.de>
To:     Stephen Brennan <stephen@...nnan.io>
Cc:     Mark Rutland <mark.rutland@....com>, devicetree@...r.kernel.org,
        linux-rpi-kernel@...ts.infradead.org,
        Florian Fainelli <f.fainelli@...il.com>,
        Herbert Xu <herbert@...dor.apana.org.au>,
        Scott Branden <sbranden@...adcom.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        linux-arm-kernel@...ts.infradead.org, Ray Jui <rjui@...adcom.com>,
        linux-kernel@...r.kernel.org, Eric Anholt <eric@...olt.net>,
        Rob Herring <robh+dt@...nel.org>,
        bcm-kernel-feedback-list@...adcom.com,
        Stefan Wahren <wahrenst@....net>,
        Matt Mackall <mpm@...enic.com>, Arnd Bergmann <arnd@...db.de>,
        linux-crypto@...r.kernel.org
Subject: Re: [PATCH 3/3] ARM: dts: bcm2711: Enable HWRNG support

Hi Stephen,

On Sun, 2019-11-17 at 23:58 -0800, Stephen Brennan wrote:
> From: Stefan Wahren <wahrenst@....net>
> 
> This enables hardware random number generator support for the BCM2711
> on the Raspberry Pi 4 board.
> 
> Signed-off-by: Stefan Wahren <wahrenst@....net>
> Signed-off-by: Stephen Brennan <stephen@...nnan.io>
> ---
>  arch/arm/boot/dts/bcm2711.dtsi | 5 ++---
>  1 file changed, 2 insertions(+), 3 deletions(-)
> 
> diff --git a/arch/arm/boot/dts/bcm2711.dtsi b/arch/arm/boot/dts/bcm2711.dtsi
> index ac83dac2e6ba..2c19e5de284a 100644
> --- a/arch/arm/boot/dts/bcm2711.dtsi
> +++ b/arch/arm/boot/dts/bcm2711.dtsi
> @@ -92,10 +92,9 @@ pm: watchdog@...00000 {
>  		};
>  
>  		rng@...04000 {
> +			compatible = "brcm,bcm2711-rng200";
>  			interrupts = <GIC_SPI 125 IRQ_TYPE_LEVEL_HIGH>;
> -
> -			/* RNG is incompatible with brcm,bcm2835-rng */
> -			status = "disabled";
> +			status = "okay";
>  		};
>  
>  		uart2: serial@...01400 {

We inherit the reg property from bcm283x.dtsi, on which we only define a size
of 0x10 bytes. I gather from the driver that iproc-rng200's register space is
at least 0x28 bytes big. We should also update the 'reg' property to:

	reg = <0x7e104000 0x28>;

Regards,
Nicolas


Download attachment "signature.asc" of type "application/pgp-signature" (489 bytes)