Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id C2E16C636CC for ; Tue, 31 Jan 2023 23:22:49 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232224AbjAaXWq (ORCPT ); Tue, 31 Jan 2023 18:22:46 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53950 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232154AbjAaXWc (ORCPT ); Tue, 31 Jan 2023 18:22:32 -0500 Received: from mx0a-00069f02.pphosted.com (mx0a-00069f02.pphosted.com [205.220.165.32]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 9A2C443921 for ; Tue, 31 Jan 2023 15:22:31 -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 30VIiPux014328; Tue, 31 Jan 2023 23:22:26 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=QzGDou7II+0XJobEdCfj83zwQwvrnWGS/Id+S4qyZJPuzPwGYJJ7Bl3/r28bYi3z9kar upKUUPrU7+ro+nlkeWMk7r5s8DNIwa57di4KUhbYgzXtBrGo/Xp/GzHGRz324VN/Bsen 1ncOLctbloAb8JjqTEaYXtxVAQdlzgSlIoWpkRHr44n34y1yfk+FMp9Jk7uAjd/nyqk5 l5SUu6Sw8AlvIQW4a5qX60wA7MpiFfaIsuWkhf6p2ByM0NGkf6Y9Cy1JpCMVFuNt7kHl uOfOE5Ljfg67LH6r8yr0L3NZpwWciHLFM/aCKxayhDhp/L/1AsYY4FhutAieCVqiNJ9X bg== Received: from iadpaimrmta03.imrmtpd1.prodappiadaev1.oraclevcn.com (iadpaimrmta03.appoci.oracle.com [130.35.103.27]) by mx0b-00069f02.pphosted.com (PPS) with ESMTPS id 3ncvq9q2nc-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Tue, 31 Jan 2023 23:22:26 +0000 Received: from pps.filterd (iadpaimrmta03.imrmtpd1.prodappiadaev1.oraclevcn.com [127.0.0.1]) by iadpaimrmta03.imrmtpd1.prodappiadaev1.oraclevcn.com (8.17.1.5/8.17.1.5) with ESMTP id 30VMuk9O031540; Tue, 31 Jan 2023 23:22:25 GMT Received: from ban25x6uut24.us.oracle.com (ban25x6uut24.us.oracle.com [10.153.73.24]) by iadpaimrmta03.imrmtpd1.prodappiadaev1.oraclevcn.com (PPS) with ESMTP id 3nct5d8c94-5; Tue, 31 Jan 2023 23:22:25 +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 4/6] virtio: VIRTIO_DEVICE_F_MASK for all per-device features Date: Tue, 31 Jan 2023 15:22:05 -0800 Message-Id: <1675207327-22289-5-git-send-email-si-wei.liu@oracle.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1675207327-22289-1-git-send-email-si-wei.liu@oracle.com> References: <1675207327-22289-1-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 bulkscore=0 malwarescore=0 suspectscore=0 adultscore=0 mlxscore=0 phishscore=0 mlxlogscore=999 spamscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2212070000 definitions=main-2301310201 X-Proofpoint-ORIG-GUID: DNIQ03djdSKlZsZpxmdzs4RxcmtAX4HB X-Proofpoint-GUID: DNIQ03djdSKlZsZpxmdzs4RxcmtAX4HB Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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? */ -- 1.8.3.1