Avi Kivity wrote: > Wierd. For what gfn/pfns does this trigger? > It is ZERO_PAGE which also has Reserved bit, not mmio page. The pte is set write-protected, I still don't know why it cause the system hangup. set_spte() { if (tdp_enabled) spte |= kvm_x86_ops->get_mt_mask(vcpu, gfn, kvm_is_mmio_pfn(pfn)); /* guest can write to the page because of this statement? */ } -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html