linux-kernel - Re: [PATCH] ARM: move firmware

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Message-ID: <20131118171445.GI16735@n2100.arm.linux.org.uk>
Date:	Mon, 18 Nov 2013 17:14:45 +0000
From:	Russell King - ARM Linux <linux@....linux.org.uk>
To:	Catalin Marinas <catalin.marinas@....com>
Cc:	Alexandre Courbot <acourbot@...dia.com>,
	Kukjin Kim <kgene.kim@...sung.com>,
	Kyungmin Park <kyungmin.park@...sung.com>,
	Tomasz Figa <t.figa@...sung.com>,
	Olof Johansson <olof@...om.net>,
	Alexandre Courbot <gnurou@...il.com>,
	linux-samsung-soc@...r.kernel.org,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH] ARM: move firmware_ops to drivers/firmware

On Sun, Nov 17, 2013 at 03:59:04PM +0000, Catalin Marinas wrote:
> No L2x0 (L210, L220, PL310) cache on ARMv8. And here I strongly
> recommend the hardware people to make proper external caches which can
> be flushed by standard CPU instructions, not MMIO. Any such caches
> must be enabled by firmware before Linux starts.

Yea, and we've seen what a trainwreck that causes on 32-bit ARM with
the kernel exploding at boot time because of a dirty L2 cache.
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