Hello List, (1) What is the correct way of tracking reads on given gfn ?
Looks like functions rmap_write_protect(kvm, gfn) and kvm_mmu_rmap_write_protect(kvm, gfn, slot) removes the write permission for the given page, by flipping write bit using PT_WRITABLE_MASK. Thus trapping writes. For trapping reads, are there similar routines ? If not, I see equivalent flag PM_PRESENT_MASK. Thus one way probably is writing wrapper routines similar to above to flip both read(present) and write bits. Or would it be just enough to drop the spte instead using function drop_spte() ? (2) Is kvm_flush_remote_tlbs() required after either of above approaches ? Is kvm_flush_remote_tlbs() correct function to flush tlbs ? -- -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
