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Re: [Xen-devel] [PATCH] x86/VMX: don't risk corrupting host CR4

  • To: Jan Beulich <JBeulich@xxxxxxxx>, xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxxx>
  • From: "Tian, Kevin" <kevin.tian@xxxxxxxxx>
  • Date: Mon, 12 Mar 2018 00:18:14 +0000
  • Accept-language: en-US
  • Cc: "Nakajima, Jun" <jun.nakajima@xxxxxxxxx>
  • Delivery-date: Mon, 12 Mar 2018 00:18:51 +0000
  • Dlp-product: dlpe-windows
  • Dlp-reaction: no-action
  • Dlp-version: 11.0.0.116
  • List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
  • Thread-index: AQHTt7GSLe50q7O5dkqhsdT0ARnmYqPLv7SQ
  • Thread-topic: [PATCH] x86/VMX: don't risk corrupting host CR4
> From: Jan Beulich [mailto:JBeulich@xxxxxxxx]
> Sent: Friday, March 9, 2018 10:19 PM
> 
> Instead of "syncing" the live value to what mmu_cr4_features has, make
> sure vCPU-s run with the value most recently loaded into %cr4, such that
> after the next VM exit we continue to run with the intended value rather
> than a possibly stale one.
> 
> Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>

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

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