linux-kernel - Re: [PATCH] [ARM] Use AT() in the linker script to create correct program headers

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Message-ID: <20121009173706.GE4124@obsidianresearch.com>
Date:	Tue, 9 Oct 2012 11:37:06 -0600
From:	Jason Gunthorpe <jgunthorpe@...idianresearch.com>
To:	Dave Martin <dave.martin@...aro.org>
Cc:	Russell King - ARM Linux <linux@....linux.org.uk>,
	linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH] [ARM] Use AT() in the linker script to create correct
 program headers

On Mon, Oct 08, 2012 at 11:24:13AM +0100, Dave Martin wrote:

> Partly this came from some side speculation about whether we could do
> things like privileged read-only permissions on newer CPUs, for preventing
> unintended or undesired writes to the kernel's code or read-only data.

Some other arches page protect the kernel, but that tends to be at
odds with the desire to use huge pages for the kernel mapping, and
independent of the load headers..

Jason
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