Re: [Xen-devel] [PATCH v1 2/3] x86/vvmx: correct nested shadow VMCS handling

["Tian, Kevin" <kevin.tian@xxxxxxxxx>]

> From: Sergey Dyasli [mailto:sergey.dyasli@xxxxxxxxxx]
> Sent: Monday, March 13, 2017 6:52 PM
> 
> Currently xen always sets the shadow VMCS-indicator bit on nested vmptrld
> and always clears it on nested vmclear.  This behavior is wrong when the
> guest loads a shadow VMCS: shadow bit will be lost on nested vmclear.
> 
> Fix this by checking if the guest has provided a shadow VMCS.
> 
> Signed-off-by: Sergey Dyasli <sergey.dyasli@xxxxxxxxxx>

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

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