Re: [Xen-devel] [PATCH v2] vvmx: fixes after CR4 trapping optimizations

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

> From: Roger Pau Monne [mailto:roger.pau@xxxxxxxxxx]
> Sent: Saturday, March 3, 2018 12:19 AM
> 
> Commit 406817 doesn't update nested VMX code in order to take into
> account L1 CR4 host mask when nested guest (L2) writes to CR4, and
> thus the mask written to CR4_GUEST_HOST_MASK is likely not as
> restrictive as it should be.
> 
> Also the VVMCS GUEST_CR4 value should be updated to match the
> underlying value when syncing the VVMCS state.
> 
> Fixes: 406817 ("vmx/hap: optimize CR4 trapping")
> Signed-off-by: Roger Pau Monné <roger.pau@xxxxxxxxxx>

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