From patchwork Fri Oct 1 07:05:59 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Eugenio Perez Martin X-Patchwork-Id: 1535223 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: bilbo.ozlabs.org; dkim=fail reason="signature verification failed" (1024-bit key; unprotected) header.d=redhat.com header.i=@redhat.com header.a=rsa-sha256 header.s=mimecast20190719 header.b=EEQe23rk; dkim-atps=neutral Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=nongnu.org (client-ip=209.51.188.17; helo=lists.gnu.org; envelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org; receiver=) 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 bilbo.ozlabs.org (Postfix) with ESMTPS id 4HLM8G5g8wz9sRK for ; Fri, 1 Oct 2021 17:25:18 +1000 (AEST) Received: from localhost ([::1]:52864 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1mWCuy-0002ik-Gg for incoming@patchwork.ozlabs.org; Fri, 01 Oct 2021 03:25:16 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:36670) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mWCio-0004K6-S7 for qemu-devel@nongnu.org; Fri, 01 Oct 2021 03:12:43 -0400 Received: from us-smtp-delivery-124.mimecast.com ([170.10.133.124]:36986) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mWCin-0005Pm-82 for qemu-devel@nongnu.org; Fri, 01 Oct 2021 03:12:42 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1633072360; 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=vzWYw5TdT4VDxLuD7rJPNEK27A6V1k2WSJKxtaO9E8Q=; b=EEQe23rkPF8eSoUe+AoNMklqb/X66gbzjbVNCZF7ODMJ45hjJ8WW5PNBpx3T9UtNs8qwwx SRkcR1SSEuk5Yukc0ajsnKCcgigw1ZIuKhyX7ArU/Gr99jJ7zrlfv1pr7a3EllcpnHW5ZY ZkjHnjdT0U+IE3VIAPBucp1j5x808P0= 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-250-3dRQ6-m-PaGfBzEIbwGrqQ-1; Fri, 01 Oct 2021 03:12:37 -0400 X-MC-Unique: 3dRQ6-m-PaGfBzEIbwGrqQ-1 Received: from smtp.corp.redhat.com (int-mx01.intmail.prod.int.phx2.redhat.com [10.5.11.11]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 9933218D6A35; Fri, 1 Oct 2021 07:12:36 +0000 (UTC) Received: from eperezma.remote.csb (unknown [10.39.193.2]) by smtp.corp.redhat.com (Postfix) with ESMTP id 58310652A3; Fri, 1 Oct 2021 07:12:04 +0000 (UTC) From: =?utf-8?q?Eugenio_P=C3=A9rez?= To: qemu-devel@nongnu.org Subject: [RFC PATCH v4 16/20] vhost: Check for device VRING_USED_F_NO_NOTIFY at shadow virtqueue kick Date: Fri, 1 Oct 2021 09:05:59 +0200 Message-Id: <20211001070603.307037-17-eperezma@redhat.com> In-Reply-To: <20211001070603.307037-1-eperezma@redhat.com> References: <20211001070603.307037-1-eperezma@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.11 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=eperezma@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Received-SPF: pass client-ip=170.10.133.124; envelope-from=eperezma@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -27 X-Spam_score: -2.8 X-Spam_bar: -- X-Spam_report: (-2.8 / 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_LOW=-0.7, 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: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Parav Pandit , Juan Quintela , Jason Wang , "Michael S. Tsirkin" , Markus Armbruster , virtualization@lists.linux-foundation.org, Harpreet Singh Anand , Xiao W Wang , Stefan Hajnoczi , Eli Cohen , Eric Blake , Michael Lilja , Stefano Garzarella Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: "Qemu-devel" Signed-off-by: Eugenio Pérez --- hw/virtio/vhost-shadow-virtqueue.c | 11 ++++++++++- 1 file changed, 10 insertions(+), 1 deletion(-) diff --git a/hw/virtio/vhost-shadow-virtqueue.c b/hw/virtio/vhost-shadow-virtqueue.c index df7e6fa3ec..775f8d36a0 100644 --- a/hw/virtio/vhost-shadow-virtqueue.c +++ b/hw/virtio/vhost-shadow-virtqueue.c @@ -173,6 +173,15 @@ static void vhost_svq_add(VhostShadowVirtqueue *svq, VirtQueueElement *elem) svq->ring_id_maps[qemu_head] = elem; } +static void vhost_svq_kick(VhostShadowVirtqueue *svq) +{ + /* Make sure we are reading updated device flag */ + smp_mb(); + if (!(svq->vring.used->flags & VRING_USED_F_NO_NOTIFY)) { + event_notifier_set(&svq->kick_notifier); + } +} + /* Handle guest->device notifications */ static void vhost_handle_guest_kick(EventNotifier *n) { @@ -197,7 +206,7 @@ static void vhost_handle_guest_kick(EventNotifier *n) } vhost_svq_add(svq, elem); - event_notifier_set(&svq->kick_notifier); + vhost_svq_kick(svq); } virtio_queue_set_notification(svq->vq, true);