[Xen-devel] Re: [PATCH 06/16] xen: disable PAT

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To:

Thomas Gleixner <tglx@xxxxxxxxxxxxx>

Subject:

[Xen-devel] Re: [PATCH 06/16] xen: disable PAT

From:

Jeremy Fitzhardinge <jeremy@xxxxxxxx>

Date:

Wed, 03 Jun 2009 16:33:59 +1000

Cc:

Xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxx>, Ian Campbell <ian.campbell@xxxxxxxxxx>, the arch/x86 maintainers <x86@xxxxxxxxxx>, Linux Kernel Mailing List <linux-kernel@xxxxxxxxxxxxxxx>, Jeremy Fitzhardinge <jeremy.fitzhardinge@xxxxxxxxxx>, Ingo Molnar <mingo@xxxxxxx>

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Thomas Gleixner wrote:

On Tue, 12 May 2009, Jeremy Fitzhardinge wrote:

From: Ian Campbell <ian.campbell@xxxxxxxxxx>

Xen imposes a particular PAT layout on all paravirtual guests which
does not match the layout Linux would like to use.

Force PAT to be disabled until this is resolved.


No, this can be done via CPUID, which is paravirtualized already.


Stomp the PAT feature flag?  Yes, that's a better idea.

Thanks,
   J

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