From nobody Fri Sep 20 22:15:03 2024 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=fail(p=none dis=none) header.from=ispras.ru ARC-Seal: i=1; a=rsa-sha256; t=1613032598; cv=none; d=zohomail.com; s=zohoarc; b=LEC+a8v9ZRsLjz9/hv7dN+Ozi/akDFhJOS8fOczmgvpWGa/i648fRVxD0jMtUPoAZ/iY2fNAc2BkJshfhsXo5+QbGz2aKJOmHe0GqV5C61Z5Zbn9FJbSwpNoziRxkxnCpva9TvJbx8Yn3grhk0xh27qQJIVgoNYLKnW3wWbYn7c= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1613032598; h=Content-Type:Content-Transfer-Encoding:Cc:Date:From:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:Sender:Subject:To; bh=t56WnKWuBfRVpcztkDxMOg32mGDddOZ/eGQgb+PTn5g=; b=bSgGctlv7SXpPcApq9/194Y/UGGWNF6szALJAuvAcatAjwomXQ3wrEkTsOJtqdLwh/bfGVRgicJKeQfE3KKsIKj+WwOBhNp/mg859DN7fEHEl10HCs7uDMox+HAqZxfb3/yhzPwNVKmRwn6sNG8A2WUtZdDouu+f7A5SNQmaaA8= ARC-Authentication-Results: i=1; mx.zohomail.com; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=fail header.from= (p=none dis=none) header.from= Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1613032597217718.0026037799987; Thu, 11 Feb 2021 00:36:37 -0800 (PST) Received: from localhost ([::1]:52086 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1lA7Sm-0005qT-58 for importer@patchew.org; Thu, 11 Feb 2021 03:36:36 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]:36052) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lA7RM-0004vw-H7 for qemu-devel@nongnu.org; Thu, 11 Feb 2021 03:35:08 -0500 Received: from mail.ispras.ru ([83.149.199.84]:53772) by eggs.gnu.org with esmtps (TLS1.2:DHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lA7RH-0005jS-N2 for qemu-devel@nongnu.org; Thu, 11 Feb 2021 03:35:08 -0500 Received: from [127.0.1.1] (unknown [62.118.151.149]) by mail.ispras.ru (Postfix) with ESMTPSA id A8BA94076257; Thu, 11 Feb 2021 08:34:53 +0000 (UTC) Subject: [PATCH] virtio: disable ioeventfd for record/replay From: Pavel Dovgalyuk To: qemu-devel@nongnu.org Date: Thu, 11 Feb 2021 11:34:53 +0300 Message-ID: <161303249335.948571.16873882207700527766.stgit@pasha-ThinkPad-X280> User-Agent: StGit/0.23 MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=83.149.199.84; envelope-from=pavel.dovgalyuk@ispras.ru; helo=mail.ispras.ru X-Spam_score_int: -18 X-Spam_score: -1.9 X-Spam_bar: - X-Spam_report: (-1.9 / 5.0 requ) BAYES_00=-1.9, 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: alex.bennee@linaro.org, pbonzini@redhat.com, pavel.dovgalyuk@ispras.ru, mst@redhat.com Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" virtio devices support separate iothreads waiting for events from file descriptors. These are asynchronous events that can't be recorded and replayed, therefore this patch disables ioeventfd for all devices when record or replay is enabled. Signed-off-by: Pavel Dovgalyuk --- hw/virtio/virtio-pci.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/hw/virtio/virtio-pci.c b/hw/virtio/virtio-pci.c index 094c36aa3e..76fbc111ea 100644 --- a/hw/virtio/virtio-pci.c +++ b/hw/virtio/virtio-pci.c @@ -37,6 +37,7 @@ #include "qemu/range.h" #include "hw/virtio/virtio-bus.h" #include "qapi/visitor.h" +#include "sysemu/replay.h" =20 #define VIRTIO_PCI_REGION_SIZE(dev) VIRTIO_PCI_CONFIG_OFF(msix_present= (dev)) =20 @@ -1746,6 +1747,11 @@ static void virtio_pci_realize(PCIDevice *pci_dev, E= rror **errp) proxy->flags &=3D ~VIRTIO_PCI_FLAG_USE_IOEVENTFD; } =20 + /* fd-based ioevents can't be synchronized in record/replay */ + if (replay_mode !=3D REPLAY_MODE_NONE) { + proxy->flags &=3D ~VIRTIO_PCI_FLAG_USE_IOEVENTFD; + } + /* * virtio pci bar layout used by default. * subclasses can re-arrange things if needed.