Re: [PATCH v3 7/7] x86/kvm: support Hyper-V reenlightenment

Hi Vitaly, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on tip/auto-latest] [also build test WARNING on v4.15-rc8 next-20180118] [cannot apply to tip/x86/core kvm/linux-next] [if your patch is applied to the wrong git tree, please drop us a note to help improve

[PATCH v3 7/7] x86/kvm: support Hyper-V reenlightenment

When we run nested KVM on Hyper-V guests we need to update masterclocks for all guests when L1 migrates to a host with different TSC frequency. Implement the procedure in the following way: - Pause all guests. - Tell our host (Hyper-V) to stop emulating TSC accesses. - Update our gtod copy, recompu