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Re: [Xen-devel] [PATCH v2] vVMX: use latched VMCS machine address


  • To: Jan Beulich <JBeulich@xxxxxxxx>, xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxxx>
  • From: "Tian, Kevin" <kevin.tian@xxxxxxxxx>
  • Date: Fri, 26 Feb 2016 04:05:04 +0000
  • Accept-language: en-US
  • Cc: "Nakajima, Jun" <jun.nakajima@xxxxxxxxx>
  • Delivery-date: Fri, 26 Feb 2016 04:05:27 +0000
  • List-id: Xen developer discussion <xen-devel.lists.xen.org>
  • Thread-index: AQHRb8PmYwvX+zbo8Ua3r0E9ZEFPKJ89tcKA
  • Thread-topic: [PATCH v2] vVMX: use latched VMCS machine address

> From: Jan Beulich [mailto:JBeulich@xxxxxxxx]
> Sent: Thursday, February 25, 2016 7:58 PM
> 
> Instead of calling domain_page_map_to_mfn() over and over, latch the
> guest VMCS machine address unconditionally (i.e. independent of whether
> VMCS shadowing is supported by the hardware).
> 
> Since this requires altering the parameters of __[gs]et_vmcs{,_real}()
> (and hence all their callers) anyway, take the opportunity to also drop
> the bogus double underscores from their names (and from
> __[gs]et_vmcs_virtual() as well).
> 
> Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>
> Tested-by: Liang Z Li <liang.z.li@xxxxxxxxx>

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

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