MTRR_PHYSMASK_VALID
#define VMM_MTRR_PHYSMASK_MASK (MTRR_PHYSMASK_PHYSMASK | MTRR_PHYSMASK_VALID)
mrd->mr_flags = (msrv & MTRR_PHYSMASK_VALID) ?
msrv = MTRR_PHYSMASK_VALID |