linux-kernel - Re: [PATCH v6 00/18] ARM: Add support for the Large Physical Address Extensions

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]

Date:	Tue, 24 May 2011 20:44:57 -0400 (EDT)
From:	Nicolas Pitre <nico@...xnic.net>
To:	David Brown <davidb@...eaurora.org>
Cc:	Catalin Marinas <catalin.marinas@....com>,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	Russell King - ARM Linux <linux@....linux.org.uk>
Subject: Re: [PATCH v6 00/18] ARM: Add support for the Large Physical Address
 Extensions

On Tue, 24 May 2011, David Brown wrote:

> On Tue, May 24 2011, Catalin Marinas wrote:
> 
> > This set of patches adds support for the Large Physical Extensions on
> > the ARM architecture (available with the Cortex-A15 processor). LPAE
> > comes with a 3-level page table format (compared to 2-level for the
> > classic one), allowing up to 40-bit physical address space.
> 
> Do you expect non LPAE targets to be able to boot with these changes
> applied (and LPAE enabled)?  I am able to build this tree for the
> MSM8660 (with a minor patch below), but it fails to boot with LPAE
> enabled.  It seems to work fine with LPAE not enabled.

I wouldn't expect a LPAE kernel to boot on non LPAE capable hardware.

And I don't think we'll ever try to support both LPAE and non-LPAE modes 
in the same kernel binary either since this has implications all over 
the place in core kernel mm code.


Nicolas
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/