On Fri, Jul 06, 2018 at 06:13:11PM +0200, Thomas Gleixner wrote: > - native_write_msr(msr_kvm_wall_clock, low, high); > + wrmsrl(msr_kvm_wall_clock, slow_virt_to_phys(&wall_clock)); Does it matter that you went from an explicit native WRMSR instruction to a potentially paravirt MSR thing?