From patchwork Wed Feb 15 17:38:39 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Eugenio Perez Martin X-Patchwork-Id: 13141978 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 67516C636D7 for ; Wed, 15 Feb 2023 17:40:00 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1pSLkS-0007DW-Jn; Wed, 15 Feb 2023 12:39:16 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1pSLkR-0007DC-Ia for qemu-devel@nongnu.org; Wed, 15 Feb 2023 12:39:15 -0500 Received: from us-smtp-delivery-124.mimecast.com ([170.10.129.124]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1pSLkQ-0005nM-3x for qemu-devel@nongnu.org; Wed, 15 Feb 2023 12:39:15 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1676482753; 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=p415eOoA0AzRMR2ZX+vObtFpGw8JufxZQ7es0yOt6f4=; b=A6AfspwlhhypF84YNXJkJlj/FeT6zN6xuoV/zFIk6nd+ZZrKlfg4OTPAnub8RfU4asAlwu xsGcX3GwYOohOlNFlw46negKigjD9SlR8d5mzBs7thEHMu6V3JOjKaSRQSwzGv4dKkue8U U0qU9aavrk8UYbhTrAKxoNXHnUrQPoU= Received: from mimecast-mx02.redhat.com (mimecast-mx02.redhat.com [66.187.233.88]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-167-MDw4SmtrOBSv4RKkXzH66g-1; Wed, 15 Feb 2023 12:39:07 -0500 X-MC-Unique: MDw4SmtrOBSv4RKkXzH66g-1 Received: from smtp.corp.redhat.com (int-mx07.intmail.prod.int.rdu2.redhat.com [10.11.54.7]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 5E2DF884348; Wed, 15 Feb 2023 17:39:06 +0000 (UTC) Received: from eperezma.remote.csb (unknown [10.39.192.155]) by smtp.corp.redhat.com (Postfix) with ESMTP id 3E51F140EBF4; Wed, 15 Feb 2023 17:39:03 +0000 (UTC) From: =?utf-8?q?Eugenio_P=C3=A9rez?= To: qemu-devel@nongnu.org Cc: Cindy Lu , Shannon Nelson , longpeng2@huawei.com, virtualization@lists.linux-foundation.org, Harpreet Singh Anand , si-wei.liu@oracle.com, Stefan Hajnoczi , Eli Cohen , "Michael S. Tsirkin" , Gautam Dawar , Laurent Vivier , Liuxiangdong , alvaro.karsz@solid-run.com, Parav Pandit , Stefano Garzarella , Jason Wang , Zhu Lingshan , "Gonglei (Arei)" , Lei Yang Subject: [PATCH v3 03/14] vdpa: Negotiate _F_SUSPEND feature Date: Wed, 15 Feb 2023 18:38:39 +0100 Message-Id: <20230215173850.298832-4-eperezma@redhat.com> In-Reply-To: <20230215173850.298832-1-eperezma@redhat.com> References: <20230215173850.298832-1-eperezma@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.1 on 10.11.54.7 Received-SPF: pass client-ip=170.10.129.124; envelope-from=eperezma@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, 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_H2=-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-bounces+qemu-devel=archiver.kernel.org@nongnu.org This is needed for qemu to know it can suspend the device to retrieve its status and enable SVQ with it, so all the process is transparent to the guest. Signed-off-by: Eugenio Pérez Acked-by: Jason Wang --- hw/virtio/vhost-vdpa.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/hw/virtio/vhost-vdpa.c b/hw/virtio/vhost-vdpa.c index 300062130d..1d0209d6ad 100644 --- a/hw/virtio/vhost-vdpa.c +++ b/hw/virtio/vhost-vdpa.c @@ -659,7 +659,8 @@ static int vhost_vdpa_set_backend_cap(struct vhost_dev *dev) uint64_t features; uint64_t f = 0x1ULL << VHOST_BACKEND_F_IOTLB_MSG_V2 | 0x1ULL << VHOST_BACKEND_F_IOTLB_BATCH | - 0x1ULL << VHOST_BACKEND_F_IOTLB_ASID; + 0x1ULL << VHOST_BACKEND_F_IOTLB_ASID | + 0x1ULL << VHOST_BACKEND_F_SUSPEND; int r; if (vhost_vdpa_call(dev, VHOST_GET_BACKEND_FEATURES, &features)) {