From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id BFF4AC43613 for ; Wed, 19 Jun 2019 23:53:59 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 38CD920656 for ; Wed, 19 Jun 2019 23:53:59 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=oracle.com header.i=@oracle.com header.b="n6+72eiI" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730068AbfFSXx6 (ORCPT ); Wed, 19 Jun 2019 19:53:58 -0400 Received: from userp2120.oracle.com ([156.151.31.85]:40128 "EHLO userp2120.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726322AbfFSXx6 (ORCPT ); Wed, 19 Jun 2019 19:53:58 -0400 Received: from pps.filterd (userp2120.oracle.com [127.0.0.1]) by userp2120.oracle.com (8.16.0.27/8.16.0.27) with SMTP id x5JNnZXI076903; Wed, 19 Jun 2019 23:53:04 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oracle.com; h=subject : to : cc : references : from : message-id : date : mime-version : in-reply-to : content-type : content-transfer-encoding; s=corp-2018-07-02; bh=juZE9Qg2p6QoV0FADmXwZn45FspqngSNBEE+z0aiHAE=; b=n6+72eiI8B1UIGb08xvUPZz2XxuTbdrLFsVEu7FHkUN/7gz6NlvcDkqo8gKT8Ja5iZQR v4vxA8R2a0LmBkgn2H2+59zQ42SMhThbEmKzT45l4XXh7Xl+d2amHUF4TSe8dwCHjdHP oqAHvAYFeP3QwKiUAMIGs1JccBwH93PtCIL4k6+1FEuZ4Gt6K0i5e8CZMVK2tH2oiGVj SHHhF4ZmIfn3l0+n9umXuclcKMZaeIhgZIVP20Y3y5Jmu8PJfgh0orwz2ai6hZbN5Pwh C+1Xvr8N+1SY46SvJa4EGvAQgJFs8AJkKssrWg0FJ+P2PF3vltz49/PXbrFvzCnsL90X Iw== Received: from userp3030.oracle.com (userp3030.oracle.com [156.151.31.80]) by userp2120.oracle.com with ESMTP id 2t7809e4bj-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Wed, 19 Jun 2019 23:53:04 +0000 Received: from pps.filterd (userp3030.oracle.com [127.0.0.1]) by userp3030.oracle.com (8.16.0.27/8.16.0.27) with SMTP id x5JNpdDg106385; Wed, 19 Jun 2019 23:53:03 GMT Received: from userv0122.oracle.com (userv0122.oracle.com [156.151.31.75]) by userp3030.oracle.com with ESMTP id 2t77ync13w-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Wed, 19 Jun 2019 23:53:03 +0000 Received: from abhmp0017.oracle.com (abhmp0017.oracle.com [141.146.116.23]) by userv0122.oracle.com (8.14.4/8.14.4) with ESMTP id x5JNr1KK008938; Wed, 19 Jun 2019 23:53:01 GMT Received: from [10.159.140.81] (/10.159.140.81) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Wed, 19 Jun 2019 16:53:01 -0700 Subject: Re: [Qemu-devel] [QEMU PATCH v4 10/10] target/i386: kvm: Add nested migration blocker only when kernel lacks required capabilities To: Liran Alon , qemu-devel@nongnu.org Cc: ehabkost@redhat.com, kvm@vger.kernel.org, mtosatti@redhat.com, dgilbert@redhat.com, pbonzini@redhat.com, rth@twiddle.net, jmattson@google.com References: <20190619162140.133674-1-liran.alon@oracle.com> <20190619162140.133674-11-liran.alon@oracle.com> From: Maran Wilson Organization: Oracle Corporation Message-ID: <5ae979fd-39e0-50e2-df53-c6f70f939dd2@oracle.com> Date: Wed, 19 Jun 2019 16:52:59 -0700 User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:60.0) Gecko/20100101 Thunderbird/60.7.0 MIME-Version: 1.0 In-Reply-To: <20190619162140.133674-11-liran.alon@oracle.com> Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit Content-Language: en-US X-Proofpoint-Virus-Version: vendor=nai engine=6000 definitions=9293 signatures=668687 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 suspectscore=0 malwarescore=0 phishscore=0 bulkscore=0 spamscore=0 mlxscore=0 mlxlogscore=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1810050000 definitions=main-1906190193 X-Proofpoint-Virus-Version: vendor=nai engine=6000 definitions=9293 signatures=668687 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 priorityscore=1501 malwarescore=0 suspectscore=0 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1810050000 definitions=main-1906190193 Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org On 6/19/2019 9:21 AM, Liran Alon wrote: > Previous commits have added support for migration of nested virtualization > workloads. This was done by utilising two new KVM capabilities: > KVM_CAP_NESTED_STATE and KVM_CAP_EXCEPTION_PAYLOAD. Both which are > required in order to correctly migrate such workloads. > > Therefore, change code to add a migration blocker for vCPUs exposed with > Intel VMX or AMD SVM in case one of these kernel capabilities is > missing. > > Signed-off-by: Liran Alon > --- > target/i386/kvm.c | 9 +++++++-- > 1 file changed, 7 insertions(+), 2 deletions(-) > > diff --git a/target/i386/kvm.c b/target/i386/kvm.c > index 99480a52ad33..a3d0fbed3b35 100644 > --- a/target/i386/kvm.c > +++ b/target/i386/kvm.c > @@ -1313,9 +1313,14 @@ int kvm_arch_init_vcpu(CPUState *cs) > !!(c->ecx & CPUID_EXT_SMX); > } > > - if (cpu_has_nested_virt(env) && !nested_virt_mig_blocker) { > + if (cpu_has_nested_virt(env) && !nested_virt_mig_blocker && > + ((kvm_max_nested_state_length() <= 0) || !has_exception_payload)) { > error_setg(&nested_virt_mig_blocker, > - "Nested virtualization does not support live migration yet"); > + "Kernel do not provide required capabilities for " s/do/does/ And with that change: Reviewed-by: Maran Wilson Thanks, -Maran > + "nested virtualization migration. " > + "(CAP_NESTED_STATE=%d, CAP_EXCEPTION_PAYLOAD=%d)", > + kvm_max_nested_state_length() > 0, > + has_exception_payload); > r = migrate_add_blocker(nested_virt_mig_blocker, &local_err); > if (local_err) { > error_report_err(local_err);