Merge tag 'kvm-x86-misc-6.3' of https://github.com/kvm-x86/linux into HEAD

KVM x86 changes for 6.3:

 - Advertise support for Intel's fancy new fast REP string features

 - Fix a double-shootdown issue in the emergency reboot code

 - Ensure GIF=1 and disable SVM during an emergency reboot, i.e. give SVM
   similar treatment to VMX

 - Update Xen's TSC info CPUID sub-leaves as appropriate

 - Add support for Hyper-V's extended hypercalls, where "support" at this
   point is just forwarding the hypercalls to userspace

 - Clean up the kvm->lock vs. kvm->srcu sequences when updating the PMU and
   MSR filters

 - One-off fixes and cleanups