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From: Jeremy Fitzhardinge <jeremy@goop.org>
To: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@elte.hu>,
	the arch/x86 maintainers <x86@kernel.org>,
	Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
	Xen-devel <xen-devel@lists.xensource.com>,
	Ian Campbell <ian.campbell@citrix.com>,
	Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Subject: Re: [PATCH 06/16] xen: disable PAT
Date: Wed, 03 Jun 2009 16:33:59 +1000	[thread overview]
Message-ID: <4A261957.3040103@goop.org> (raw)
In-Reply-To: <alpine.LFD.2.00.0906021736320.3419@localhost.localdomain>

Thomas Gleixner wrote:
> On Tue, 12 May 2009, Jeremy Fitzhardinge wrote:
>
>   
>> From: Ian Campbell <ian.campbell@citrix.com>
>>
>> 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

WARNING: multiple messages have this Message-ID (diff)
From: Jeremy Fitzhardinge <jeremy@goop.org>
To: Thomas Gleixner <tglx@linutronix.de>
Cc: Xen-devel <xen-devel@lists.xensource.com>,
	Ian Campbell <ian.campbell@citrix.com>,
	the arch/x86 maintainers <x86@kernel.org>,
	Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
	Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>,
	Ingo Molnar <mingo@elte.hu>
Subject: Re: [PATCH 06/16] xen: disable PAT
Date: Wed, 03 Jun 2009 16:33:59 +1000	[thread overview]
Message-ID: <4A261957.3040103@goop.org> (raw)
In-Reply-To: <alpine.LFD.2.00.0906021736320.3419@localhost.localdomain>

Thomas Gleixner wrote:
> On Tue, 12 May 2009, Jeremy Fitzhardinge wrote:
>
>   
>> From: Ian Campbell <ian.campbell@citrix.com>
>>
>> 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

  reply	other threads:[~2009-06-03  6:34 UTC|newest]

Thread overview: 50+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2009-05-12 21:28 [GIT PULL] xen dom0 core changes Jeremy Fitzhardinge
2009-05-12 21:28 ` Jeremy Fitzhardinge
2009-05-12 21:28 ` [PATCH 01/16] xen dom0: Make hvc_xen console work for dom0 Jeremy Fitzhardinge
2009-05-12 21:28   ` Jeremy Fitzhardinge
2009-05-12 21:28 ` [PATCH 02/16] xen dom0: Initialize xenbus " Jeremy Fitzhardinge
2009-05-12 21:28   ` Jeremy Fitzhardinge
2009-05-12 21:28 ` [PATCH 03/16] xen dom0: Set up basic IO permissions " Jeremy Fitzhardinge
2009-05-12 21:28   ` Jeremy Fitzhardinge
2009-05-12 21:28 ` [PATCH 04/16] xen dom0: Add support for the platform_ops hypercall Jeremy Fitzhardinge
2009-05-12 21:28   ` Jeremy Fitzhardinge
2009-05-12 21:28 ` [PATCH 05/16] xen mtrr: Add mtrr_ops support for Xen mtrr Jeremy Fitzhardinge
2009-05-12 21:28   ` Jeremy Fitzhardinge
2009-06-02 15:36   ` Thomas Gleixner
2009-06-03  6:34     ` Jeremy Fitzhardinge
2009-06-03  6:34       ` Jeremy Fitzhardinge
2009-05-12 21:28 ` [PATCH 06/16] xen: disable PAT Jeremy Fitzhardinge
2009-05-12 21:28   ` Jeremy Fitzhardinge
2009-06-02 15:37   ` Thomas Gleixner
2009-06-03  6:33     ` Jeremy Fitzhardinge [this message]
2009-06-03  6:33       ` Jeremy Fitzhardinge
2009-05-12 21:28 ` [PATCH 07/16] xen/dom0: use _PAGE_IOMAP in ioremap to do machine mappings Jeremy Fitzhardinge
2009-05-12 21:28   ` Jeremy Fitzhardinge
2009-05-12 21:28 ` [PATCH 08/16] xen/dom0: Use host E820 map Jeremy Fitzhardinge
2009-05-12 21:28   ` Jeremy Fitzhardinge
2009-05-12 21:28 ` [PATCH 09/16] xen: implement XENMEM_machphys_mapping Jeremy Fitzhardinge
2009-05-12 21:28   ` Jeremy Fitzhardinge
2009-05-12 21:28 ` [PATCH 10/16] xen: clear reserved bits in l3 entries given in the initial pagetables Jeremy Fitzhardinge
2009-05-12 21:28   ` Jeremy Fitzhardinge
2009-05-12 21:28 ` [PATCH 11/16] xen: allow enable use of VGA console on dom0 Jeremy Fitzhardinge
2009-05-12 21:28   ` Jeremy Fitzhardinge
2009-05-12 21:28 ` [PATCH 12/16] xen/dom0: add XEN_DOM0 config option Jeremy Fitzhardinge
2009-05-12 21:28   ` Jeremy Fitzhardinge
2009-05-12 21:28 ` [PATCH 13/16] x86: make /dev/mem mappings _PAGE_IOMAP Jeremy Fitzhardinge
2009-05-12 21:28   ` Jeremy Fitzhardinge
2009-05-12 21:28 ` [PATCH 14/16] paravirtualize IO permission bitmap Jeremy Fitzhardinge
2009-05-12 21:28   ` Jeremy Fitzhardinge
2009-06-02 16:11   ` Thomas Gleixner
2009-06-03  6:36     ` Jeremy Fitzhardinge
2009-06-03  6:36       ` Jeremy Fitzhardinge
2009-05-12 21:28 ` [PATCH 15/16] x86: don't need "changed" parameter for set_io_bitmap() Jeremy Fitzhardinge
2009-05-12 21:28   ` Jeremy Fitzhardinge
2009-05-12 21:28 ` [PATCH 16/16] xen/i386: make sure initial VGA/ISA mappings are not overridden Jeremy Fitzhardinge
2009-05-12 21:28   ` Jeremy Fitzhardinge
  -- strict thread matches above, loose matches on Subject: below --
2009-05-27  7:15 [GIT PULL REPOST] xen/dom0/core - core Xen dom0 support changes Jeremy Fitzhardinge
2009-05-27  7:15 ` [PATCH 06/16] xen: disable PAT Jeremy Fitzhardinge
2009-05-07 21:10 [GIT PULL] xen: core dom0 support Jeremy Fitzhardinge
2009-05-07 21:10 ` [PATCH 06/16] xen: disable PAT Jeremy Fitzhardinge
2009-05-07 21:10   ` Jeremy Fitzhardinge
2009-05-08 11:14   ` Ingo Molnar
2009-05-08 11:14     ` Ingo Molnar
2009-05-08 12:38     ` Ian Campbell
2009-05-08 14:50       ` Alan Cox

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