linux-kernel - Re: [RFC v2 3/5] clk: bcm2835: use firmware interface to update pllb

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: <46004f242c2618a185445630580116c772455613.camel@suse.de>
Date:   Tue, 21 May 2019 13:39:31 +0200
From:   Nicolas Saenz Julienne <nsaenzjulienne@...e.de>
To:     Oliver Neukum <oneukum@...e.com>, stefan.wahren@...e.com,
        Florian Fainelli <f.fainelli@...il.com>,
        Ray Jui <rjui@...adcom.com>,
        Scott Branden <sbranden@...adcom.com>,
        bcm-kernel-feedback-list@...adcom.com,
        Eric Anholt <eric@...olt.net>
Cc:     mbrugger@...e.de, viresh.kumar@...aro.org, rjw@...ysocki.net,
        sboyd@...nel.org, ptesarik@...e.com,
        linux-rpi-kernel@...ts.infradead.org, ssuloev@...altech.com,
        linux-clk@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        mturquette@...libre.com, linux-pm@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [RFC v2 3/5] clk: bcm2835: use firmware interface to update pllb

Hi Oliver, thanks for the review.

On Mon, 2019-05-20 at 14:43 +0200, Oliver Neukum wrote:
> On Mo, 2019-05-20 at 12:47 +0200, Nicolas Saenz Julienne wrote:
> > + * For more information on the firmware interface check:
> > + * https://github.com/raspberrypi/firmware/wiki/Mailbox-property-interface
> > + */
> > +struct bcm2835_firmware_prop {
> > +       u32 id;
> > +       u32 val;
> > +       u32 disable_turbo;
> > +} __packed;
> 
> Hi,
> 
> technically we are not in arch and those fields have a defined
> endianness.
> 

Well I set it as packed since it's 'sent' through a memory mapped firmware
interface. Hence the need for the structure format to be fixed. So I guessed
we're safer with it, as I'm not 100% sure what the different compilers are
going to do with it (although it's very likely it'll stay the same). BTW this
will be built both for arm & arm64.

Regards,
Nicolas


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