linux-kernel - Re: [PATCH] arm: l2c: unlock ways when in non-secure mode

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: <20171126131812.GZ31757@n2100.armlinux.org.uk>
Date:   Sun, 26 Nov 2017 13:18:13 +0000
From:   Russell King - ARM Linux <linux@...linux.org.uk>
To:     Peng Fan <peng.fan@....com>
Cc:     linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        van.freenix@...il.com, Mark Rutland <mark.rutland@....com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Chris Brandt <chris.brandt@...esas.com>,
        Will Deacon <will.deacon@....com>
Subject: Re: [PATCH] arm: l2c: unlock ways when in non-secure mode

On Sun, Nov 26, 2017 at 08:25:30PM +0800, Peng Fan wrote:
> To boot Linux in Non-secure mode with l2x0, the l2x0 controller
> is enabled in secure mode and ways locked to make it seems L2 cache
> disabled during linux boot process. So during l2x0 initialization,
> need to unlock the ways to make l2x0 could cache data/inst.

Why was this chosen instead of doing what everyone else does?

-- 
RMK's Patch system: http://www.armlinux.org.uk/developer/patches/
FTTC broadband for 0.8mile line in suburbia: sync at 8.8Mbps down 630kbps up
According to speedtest.net: 8.21Mbps down 510kbps up