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Re: [PATCH 4/8] x86/pv: handle reads to the PAT MSR
- To: Roger Pau Monne <roger.pau@xxxxxxxxxx>, <xen-devel@xxxxxxxxxxxxxxxxxxxx>
- From: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
- Date: Tue, 18 Aug 2020 14:50:24 +0100
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- Cc: Jan Beulich <jbeulich@xxxxxxxx>, Wei Liu <wl@xxxxxxx>
- Delivery-date: Tue, 18 Aug 2020 13:50:33 +0000
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- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 17/08/2020 16:57, Roger Pau Monne wrote:
> The value in the PAT MSR is part of the ABI between Xen and PV guests,
> and there's no reason to not allow a PV guest to read it.
This is faster than using RDMSR to find the constant.
> Signed-off-by: Roger Pau Monné <roger.pau@xxxxxxxxxx>
Acked-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
(Can fix up on commit)
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