Jing, On Wed, Dec 15 2021 at 14:35, Jing2 Liu wrote: > On 12/14/2021 10:50 AM, Thomas Gleixner wrote: >> KVM can disable the write emulation for the XFD MSR when the vCPU's fpstate >> is already correctly sized to reduce the overhead. >> >> When write emulation is disabled the XFD MSR state after a VMEXIT is >> unknown and therefore not in sync with the software states in fpstate and >> the per CPU XFD cache. >> >> Provide kvm_sync_guest_vmexit_xfd_state() which has to be invoked after a >> VMEXIT before enabling interrupts when write emulation is disabled for the >> XFD MSR. > Thanks for this function. > > s/kvm_sync_guest_vmexit_xfd_state/fpu_sync_guest_vmexit_xfd_state > in subject and changelog. I clearly need more sleep.
