Re: [Xen-devel] [PATCH 2/3] x86/vmx: Don't self-recurse in vmx_update_guest_cr()

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

> From: Andrew Cooper [mailto:andrew.cooper3@xxxxxxxxxx]
> Sent: Saturday, September 30, 2017 2:31 AM
> 
> An update to CR4 following a CR0 update can be done easily by falling
> through into the CR4 case.  This avoids unnecessary passes through
> vmx_vmcs_{enter,exit}() and unnecessary stack usage (as the compiler
> cannot optimise this use to a tailcall).
> 
> Signed-off-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>

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

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