On 27/11/18 06:04, Junaid Shahid wrote: > There is a subtle point here which might be worth mentioning in a comment. [...] You're absolutely right, it's subtle and should be mentioned. >> @@ -2945,6 +3012,9 @@ static long kvm_vm_ioctl_check_extension_generic(struct kvm *kvm, long arg) >> case KVM_CAP_IOEVENTFD_ANY_LENGTH: >> case KVM_CAP_CHECK_EXTENSION_VM: >> case KVM_CAP_ENABLE_CAP_VM: >> +#ifdef CONFIG_KVM_GENERIC_DIRTYLOG_READ_PROTECT >> + case KVM_CAP_MANUAL_DIRTY_LOG_PROTECT: >> +#endif > Shouldn't we also add this new CONFIG option to the Kconfig file? > It's already there. The new part is that if you are using it, you get manual reprotection for free. Paolo