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[2620:137:e000::1:20]) by mx.google.com with ESMTP id t15-20020a170902e84f00b001898d8881d1si7365498plg.598.2023.01.31.15.25.29; Tue, 31 Jan 2023 15:25:41 -0800 (PST) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; dkim=pass header.i=@oracle.com header.s=corp-2022-7-12 header.b=bcFHlrIJ; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=oracle.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230104AbjAaXX5 (ORCPT + 99 others); Tue, 31 Jan 2023 18:23:57 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:56060 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231478AbjAaXXv (ORCPT ); Tue, 31 Jan 2023 18:23:51 -0500 Received: from mx0a-00069f02.pphosted.com (mx0a-00069f02.pphosted.com [205.220.165.32]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B4AF61B4 for ; Tue, 31 Jan 2023 15:23:27 -0800 (PST) Received: from pps.filterd (m0246627.ppops.net [127.0.0.1]) by mx0b-00069f02.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 30VIiQsn014351; Tue, 31 Jan 2023 23:22:46 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oracle.com; h=from : to : cc : subject : date : message-id : in-reply-to : references; s=corp-2022-7-12; bh=t7qcF4HWMxrV8l58tGxaDXS4xRP41Hcy7/t+u7kgys0=; b=bcFHlrIJEo3HTxMg2jAzLl3Stjmo2AayMg1EYSD+jkfHHI6kp4O6HETAZMcWqexdFHzh 0PUqxnra4JnBhWqbJmVz5uAMhcNpKcj0K/nQvCvr6E8UuSW7LIqQ9GTsK5lGWRPFqbtq vXw48588t91lmL6DvD2LIr2mNWwwa/H7Cl1Wc7TkcultV4LAZmhItxWwYOuvXJPz7R5M Vp5+DkTSrcuiATf2wjbRbCbDuEWkJMa10MBx1TB9Lv8CaS/e9t5D2VOt5vk6CLr5VaQj vLGkCuQ3GIEsVjDR3zDB9kBFCCci0rS03dmq/SKBFs4YbHpCE63TyfFKbv0ApwJLHVp/ 1g== Received: from phxpaimrmta01.imrmtpd1.prodappphxaev1.oraclevcn.com (phxpaimrmta01.appoci.oracle.com [138.1.114.2]) by mx0b-00069f02.pphosted.com (PPS) with ESMTPS id 3ncvq9q2nr-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Tue, 31 Jan 2023 23:22:45 +0000 Received: from pps.filterd (phxpaimrmta01.imrmtpd1.prodappphxaev1.oraclevcn.com [127.0.0.1]) by phxpaimrmta01.imrmtpd1.prodappphxaev1.oraclevcn.com (8.17.1.5/8.17.1.5) with ESMTP id 30VN9OVn033826; Tue, 31 Jan 2023 23:22:45 GMT Received: from ban25x6uut24.us.oracle.com (ban25x6uut24.us.oracle.com [10.153.73.24]) by phxpaimrmta01.imrmtpd1.prodappphxaev1.oraclevcn.com (PPS) with ESMTP id 3nct56fb9w-5; Tue, 31 Jan 2023 23:22:45 +0000 From: Si-Wei Liu To: mst@redhat.com, jasowang@redhat.com, parav@nvidia.com, elic@nvidia.com Cc: virtualization@lists.linux-foundation.org, linux-kernel@vger.kernel.org Subject: [PATCH v2 4/7] virtio: VIRTIO_DEVICE_F_MASK for all per-device features Date: Tue, 31 Jan 2023 15:22:22 -0800 Message-Id: <1675207345-22328-5-git-send-email-si-wei.liu@oracle.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1675207345-22328-1-git-send-email-si-wei.liu@oracle.com> References: <1675207345-22328-1-git-send-email-si-wei.liu@oracle.com> X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.219,Aquarius:18.0.930,Hydra:6.0.562,FMLib:17.11.122.1 definitions=2023-01-31_08,2023-01-31_01,2022-06-22_01 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 mlxscore=0 adultscore=0 malwarescore=0 spamscore=0 phishscore=0 mlxlogscore=999 suspectscore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2212070000 definitions=main-2301310201 X-Proofpoint-ORIG-GUID: u7wZNLAmazzAqxLaCvdUbo6fcJwSzJ-B X-Proofpoint-GUID: u7wZNLAmazzAqxLaCvdUbo6fcJwSzJ-B X-Spam-Status: No, score=-2.8 required=5.0 tests=BAYES_00,DKIMWL_WL_MED, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_LOW, RCVD_IN_MSPIKE_H2,SPF_HELO_NONE,SPF_NONE autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1756582422563964436?= X-GMAIL-MSGID: =?utf-8?q?1756582422563964436?= Introduce VIRTIO_DEVICE_F_MASK bitmask used for identification of per-device features. Feature bits VIRTIO_TRANSPORT_F_START through VIRTIO_TRANSPORT_F_END are reserved for transport features hence are not counted as per-device features against the 64bit feature space. Signed-off-by: Si-Wei Liu --- include/uapi/linux/virtio_config.h | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/include/uapi/linux/virtio_config.h b/include/uapi/linux/virtio_config.h index 3c05162..3bdc7ed 100644 --- a/include/uapi/linux/virtio_config.h +++ b/include/uapi/linux/virtio_config.h @@ -54,6 +54,14 @@ #define VIRTIO_TRANSPORT_F_START 28 #define VIRTIO_TRANSPORT_F_END 41 +/* + * Bitmask for all per-device features: feature bits VIRTIO_TRANSPORT_F_START + * through VIRTIO_TRANSPORT_F_END are unset, i.e. 0xfffffc000fffffff for + * all 64bit features + */ +#define VIRTIO_DEVICE_F_MASK (~0ULL << (VIRTIO_TRANSPORT_F_END + 1) | \ + ((1ULL << VIRTIO_TRANSPORT_F_START) - 1)) + #ifndef VIRTIO_CONFIG_NO_LEGACY /* Do we get callbacks when the ring is completely used, even if we've * suppressed them? */