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=-6.6 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=no 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 980C6C4363D for ; Thu, 24 Sep 2020 14:10:28 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id DC156212CC for ; Thu, 24 Sep 2020 14:10:27 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="BmPj/ibg" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org DC156212CC Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:45246 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1kLRx4-0006l9-T5 for qemu-devel@archiver.kernel.org; Thu, 24 Sep 2020 10:10:26 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:53746) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kLRw1-0005um-0J for qemu-devel@nongnu.org; Thu, 24 Sep 2020 10:09:21 -0400 Received: from us-smtp-delivery-124.mimecast.com ([63.128.21.124]:59617) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_CBC_SHA1:256) (Exim 4.90_1) (envelope-from ) id 1kLRvy-0001Ge-JY for qemu-devel@nongnu.org; Thu, 24 Sep 2020 10:09:20 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1600956556; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=sJQtHgOyLWYK80fTmZRzuLxHaHw+KZcYJByzDKwyuBk=; b=BmPj/ibg+Jz9xIm+Mzr8dMoF8WDBNlRkKHqtLfCnNcFLIhZUftyK2MBJAZHZDX9jpFLWQd 9blvWVQ+vncX7yAm8i0bsTZsCs2Nu3Rkr3q4NjM/oPRkoyF7DzUgbgZCZPjPtbuq+MJmQy JmPf7MMHvZnUOj/kTGEZ5654P8EtR4o= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-410--ylz-KWBODGLN5ERA4bwGQ-1; Thu, 24 Sep 2020 10:09:14 -0400 X-MC-Unique: -ylz-KWBODGLN5ERA4bwGQ-1 Received: from smtp.corp.redhat.com (int-mx07.intmail.prod.int.phx2.redhat.com [10.5.11.22]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 10059188C128; Thu, 24 Sep 2020 14:09:12 +0000 (UTC) Received: from gondolin (ovpn-112-247.ams2.redhat.com [10.36.112.247]) by smtp.corp.redhat.com (Postfix) with ESMTP id E342B1002C06; Thu, 24 Sep 2020 14:08:58 +0000 (UTC) Date: Thu, 24 Sep 2020 16:08:56 +0200 From: Cornelia Huck To: Kirti Wankhede Subject: Re: [PATCH v26 04/17] vfio: Add migration region initialization and finalize function Message-ID: <20200924160856.1308e6f5.cohuck@redhat.com> In-Reply-To: <1600817059-26721-5-git-send-email-kwankhede@nvidia.com> References: <1600817059-26721-1-git-send-email-kwankhede@nvidia.com> <1600817059-26721-5-git-send-email-kwankhede@nvidia.com> Organization: Red Hat GmbH MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.84 on 10.5.11.22 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=cohuck@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Received-SPF: pass client-ip=63.128.21.124; envelope-from=cohuck@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/09/24 01:10:00 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] [fuzzy] X-Spam_score_int: -32 X-Spam_score: -3.3 X-Spam_bar: --- X-Spam_report: (-3.3 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-1.199, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H5=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: cjia@nvidia.com, aik@ozlabs.ru, Zhengxiao.zx@Alibaba-inc.com, shuangtai.tst@alibaba-inc.com, qemu-devel@nongnu.org, peterx@redhat.com, eauger@redhat.com, yi.l.liu@intel.com, quintela@redhat.com, ziye.yang@intel.com, armbru@redhat.com, mlevitsk@redhat.com, pasic@linux.ibm.com, felipe@nutanix.com, zhi.a.wang@intel.com, kevin.tian@intel.com, yan.y.zhao@intel.com, dgilbert@redhat.com, alex.williamson@redhat.com, changpeng.liu@intel.com, eskultet@redhat.com, Ken.Xue@amd.com, jonathan.davies@nutanix.com, pbonzini@redhat.com Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" On Wed, 23 Sep 2020 04:54:06 +0530 Kirti Wankhede wrote: > Whether the VFIO device supports migration or not is decided based of > migration region query. If migration region query is successful and migration > region initialization is successful then migration is supported else > migration is blocked. > > Signed-off-by: Kirti Wankhede > Reviewed-by: Neo Jia > Acked-by: Dr. David Alan Gilbert > --- > hw/vfio/meson.build | 1 + > hw/vfio/migration.c | 142 ++++++++++++++++++++++++++++++++++++++++++ > hw/vfio/trace-events | 5 ++ > include/hw/vfio/vfio-common.h | 9 +++ > 4 files changed, 157 insertions(+) > create mode 100644 hw/vfio/migration.c (...) > +static int vfio_migration_region_init(VFIODevice *vbasedev, int index) > +{ > + VFIOMigration *migration = vbasedev->migration; > + Object *obj = NULL; > + int ret = -EINVAL; > + > + obj = vbasedev->ops->vfio_get_object(vbasedev); > + if (!obj) { > + return ret; > + } > + > + ret = vfio_region_setup(obj, vbasedev, &migration->region, index, > + "migration"); > + if (ret) { > + error_report("%s: Failed to setup VFIO migration region %d: %s", > + vbasedev->name, index, strerror(-ret)); > + goto err; > + } > + > + if (!migration->region.size) { > + ret = -EINVAL; > + error_report("%s: Invalid region size of VFIO migration region %d: %s", > + vbasedev->name, index, strerror(-ret)); Using strerror on a hardcoded error value is probably not terribly helpful. I think printing either region.size (if you plan to extend this check later) or something like "Invalid zero-sized VFIO migration region" would make more sense. > + goto err; > + } > + > + return 0; > + > +err: > + vfio_migration_region_exit(vbasedev); > + return ret; > +} (...) Apart from that, looks good to me.