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Re: [Xen-devel] [PATCH v4 2/2] x86/vpmu: Disable VPMU if guest's CPUID indicates no PMU support

To: Boris Ostrovsky <boris.ostrovsky@xxxxxxxxxx>, "xen-devel@xxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxx>
From: "Tian, Kevin" <kevin.tian@xxxxxxxxx>
Date: Thu, 2 Mar 2017 06:23:14 +0000
Accept-language: en-US
Cc: "andrew.cooper3@xxxxxxxxxx" <andrew.cooper3@xxxxxxxxxx>, "Nakajima, Jun" <jun.nakajima@xxxxxxxxx>, "jbeulich@xxxxxxxx" <jbeulich@xxxxxxxx>
Delivery-date: Thu, 02 Mar 2017 06:23:23 +0000
List-id: Xen developer discussion <xen-devel.lists.xen.org>
Thread-index: AQHSkp3MvoK/Ob0q9E6MI0wbbWuLeaGBFZ4Q
Thread-topic: [PATCH v4 2/2] x86/vpmu: Disable VPMU if guest's CPUID indicates no PMU support

> From: Boris Ostrovsky [mailto:boris.ostrovsky@xxxxxxxxxx]
> Sent: Wednesday, March 01, 2017 11:07 PM
> 
> When toolstack overrides Intel CPUID leaf 0xa's PMU version with an
> invalid value VPMU should not be available to the guest.
> 
> Signed-off-by: Boris Ostrovsky <boris.ostrovsky@xxxxxxxxxx>
> Reviewed-by: Jan Beulich <jbeulich@xxxxxxxx>

Reviewed-by: Kevin Tian <kevin.tian@xxxxxxxxx>

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References:
- [Xen-devel] [PATCH v4 0/2] VPMU management update
  - From: Boris Ostrovsky
- [Xen-devel] [PATCH v4 2/2] x86/vpmu: Disable VPMU if guest's CPUID indicates no PMU support
  - From: Boris Ostrovsky

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