linux-kernel - Re: [PATCH v7 00/27] x86, boot, 64bit: Add support for loading ramdisk and bzImage above 4G

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Message-ID: <50D8FBF9.6050509@zytor.com>
Date:	Mon, 24 Dec 2012 17:06:01 -0800
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>
CC:	Yinghai Lu <yinghai@...nel.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...e.hu>,
	"Eric W. Biederman" <ebiederm@...ssion.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v7 00/27] x86, boot, 64bit: Add support for loading ramdisk
 and bzImage above 4G

On 12/22/2012 05:24 AM, Konrad Rzeszutek Wilk wrote:
>
> Interestingly enough I only see this on any AMD machine - different
> motherboards, different memory configurations.
>
> And also in a HVM guest running on an AMD machine. If it runs on Intel
> it works just fine.
>

Could this be the ljmpq problem that Borislav reported (Intel 
implemented ljmpq, AMD didn't, and I was tempted by a micro-optimization 
which broke AMD which made it into the patchset)?

	-hpa

-- 
H. Peter Anvin, Intel Open Source Technology Center
I work for Intel.  I don't speak on their behalf.

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