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 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 smtp.lore.kernel.org (Postfix) with ESMTPS id 90369C433EF for ; Mon, 17 Jan 2022 13:28:52 +0000 (UTC) Received: from localhost ([::1]:45792 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1n9S43-00089J-AQ for qemu-devel@archiver.kernel.org; Mon, 17 Jan 2022 08:28:51 -0500 Received: from eggs.gnu.org ([209.51.188.92]:58864) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1n9RMT-0005wV-Qu for qemu-devel@nongnu.org; Mon, 17 Jan 2022 07:43:51 -0500 Received: from szxga08-in.huawei.com ([45.249.212.255]:3270) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1n9RMQ-00023T-9i for qemu-devel@nongnu.org; Mon, 17 Jan 2022 07:43:48 -0500 Received: from dggpeml500025.china.huawei.com (unknown [172.30.72.54]) by szxga08-in.huawei.com (SkyGuard) with ESMTP id 4Jcs1S6MmJz1FCY4; Mon, 17 Jan 2022 20:39:56 +0800 (CST) Received: from dggpeml100016.china.huawei.com (7.185.36.216) by dggpeml500025.china.huawei.com (7.185.36.35) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2308.20; Mon, 17 Jan 2022 20:43:39 +0800 Received: from DESKTOP-27KDQMV.china.huawei.com (10.174.148.223) by dggpeml100016.china.huawei.com (7.185.36.216) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2308.20; Mon, 17 Jan 2022 20:43:39 +0800 To: , , CC: , , , , , Longpeng Subject: [PATCH v2 08/10] vdpa-dev: implement the get_features interface Date: Mon, 17 Jan 2022 20:43:29 +0800 Message-ID: <20220117124331.1642-9-longpeng2@huawei.com> X-Mailer: git-send-email 2.25.0.windows.1 In-Reply-To: <20220117124331.1642-1-longpeng2@huawei.com> References: <20220117124331.1642-1-longpeng2@huawei.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-Originating-IP: [10.174.148.223] X-ClientProxiedBy: dggems706-chm.china.huawei.com (10.3.19.183) To dggpeml100016.china.huawei.com (7.185.36.216) X-CFilter-Loop: Reflected Received-SPF: pass client-ip=45.249.212.255; envelope-from=longpeng2@huawei.com; helo=szxga08-in.huawei.com X-Spam_score_int: -41 X-Spam_score: -4.2 X-Spam_bar: ---- X-Spam_report: (-4.2 / 5.0 requ) BAYES_00=-1.9, RCVD_IN_DNSWL_MED=-2.3, RCVD_IN_MSPIKE_H3=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: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Reply-to: "Longpeng(Mike)" From: "Longpeng(Mike)" via From: Longpeng Implements the .get_features interface. Signed-off-by: Longpeng --- hw/virtio/vdpa-dev.c | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) diff --git a/hw/virtio/vdpa-dev.c b/hw/virtio/vdpa-dev.c index cef0a58012..7bf07fef9b 100644 --- a/hw/virtio/vdpa-dev.c +++ b/hw/virtio/vdpa-dev.c @@ -185,7 +185,14 @@ static uint64_t vhost_vdpa_device_get_features(VirtIODevice *vdev, uint64_t features, Error **errp) { - return (uint64_t)-1; + VhostVdpaDevice *s = VHOST_VDPA_DEVICE(vdev); + uint64_t backend_features = s->dev.features; + + if (!virtio_has_feature(features, VIRTIO_F_IOMMU_PLATFORM)) { + virtio_clear_feature(&backend_features, VIRTIO_F_IOMMU_PLATFORM); + } + + return backend_features; } static void vhost_vdpa_device_set_status(VirtIODevice *vdev, uint8_t status) -- 2.23.0