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Re: [Xen-devel] [PATCH 2/2] x86/page: Introduce and use PAGE_HYPERVISOR_UC

To: "Andrew Cooper" <andrew.cooper3@xxxxxxxxxx>
From: "Jan Beulich" <JBeulich@xxxxxxxx>
Date: Mon, 14 Aug 2017 05:57:57 -0600
Cc: Xen-devel <xen-devel@xxxxxxxxxxxxx>
Delivery-date: Mon, 14 Aug 2017 11:58:06 +0000
List-id: Xen developer discussion <xen-devel.lists.xen.org>

>>> On 14.08.17 at 12:57, <andrew.cooper3@xxxxxxxxxx> wrote:
> Always map the PCI MMCFG region as strongly uncacheable.  Nothing good will
> happen if stray MTRR settings end up converting UC- to WC.

I was tempted to ask the question on patch 1.

> Signed-off-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>

Reviewed-by: Jan Beulich <jbeulich@xxxxxxxx>



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References:
- [Xen-devel] [PATCH 0/2] x86/page: Minor adustments to uncacheable mappings
  - From: Andrew Cooper
- [Xen-devel] [PATCH 2/2] x86/page: Introduce and use PAGE_HYPERVISOR_UC
  - From: Andrew Cooper

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