From nobody Fri May 3 13:37:39 2024 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) client-ip=208.118.235.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Authentication-Results: mx.zohomail.com; spf=pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org Return-Path: Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) by mx.zohomail.com with SMTPS id 1517464056298915.0830249641828; Wed, 31 Jan 2018 21:47:36 -0800 (PST) Received: from localhost ([::1]:33103 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eh7ih-0000K6-Gh for importer@patchew.org; Thu, 01 Feb 2018 00:47:35 -0500 Received: from eggs.gnu.org ([2001:4830:134:3::10]:55471) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eh7ha-0008PR-Bf for qemu-devel@nongnu.org; Thu, 01 Feb 2018 00:46:31 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1eh7hX-000536-9f for qemu-devel@nongnu.org; Thu, 01 Feb 2018 00:46:26 -0500 Received: from mga04.intel.com ([192.55.52.120]:11115) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1eh7hW-00052c-VZ for qemu-devel@nongnu.org; Thu, 01 Feb 2018 00:46:23 -0500 Received: from fmsmga004.fm.intel.com ([10.253.24.48]) by fmsmga104.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 31 Jan 2018 21:46:21 -0800 Received: from fedora.sh.intel.com ([10.67.114.176]) by fmsmga004.fm.intel.com with ESMTP; 31 Jan 2018 21:46:20 -0800 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.46,443,1511856000"; d="scan'208";a="26403189" From: Changpeng Liu To: changpeng.liu@intel.com, qemu-devel@nongnu.org Date: Thu, 1 Feb 2018 13:51:33 +0800 Message-Id: <1517464293-7012-1-git-send-email-changpeng.liu@intel.com> X-Mailer: git-send-email 1.9.3 X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 192.55.52.120 Subject: [Qemu-devel] [PATCH] virtio-blk: enable multiple vectors when using multiple I/O queues X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: stefanha@gmail.com, mst@redhat.com, james.r.harris@intel.com, marcandre.lureau@redhat.com, pbonzini@redhat.com Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail: RSF_0 Z_629925259 SPT_0 Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Currently virtio-pci driver hardcoded 2 vectors for virtio-blk device, for multiple I/O queues scenario, all the I/O queues will share one interrupt vector, while here, enable multiple vectors according to the number of I/O queues. Signed-off-by: Changpeng Liu --- hw/virtio/virtio-pci.c | 12 ++++++++++-- 1 file changed, 10 insertions(+), 2 deletions(-) diff --git a/hw/virtio/virtio-pci.c b/hw/virtio/virtio-pci.c index 9ae10f0..379b00c 100644 --- a/hw/virtio/virtio-pci.c +++ b/hw/virtio/virtio-pci.c @@ -1932,7 +1932,7 @@ static Property virtio_blk_pci_properties[] =3D { DEFINE_PROP_UINT32("class", VirtIOPCIProxy, class_code, 0), DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy, flags, VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT, true), - DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 2), + DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, DEV_NVECTORS_U= NSPECIFIED), DEFINE_PROP_END_OF_LIST(), }; =20 @@ -1941,6 +1941,10 @@ static void virtio_blk_pci_realize(VirtIOPCIProxy *v= pci_dev, Error **errp) VirtIOBlkPCI *dev =3D VIRTIO_BLK_PCI(vpci_dev); DeviceState *vdev =3D DEVICE(&dev->vdev); =20 + if (vpci_dev->nvectors =3D=3D DEV_NVECTORS_UNSPECIFIED) { + vpci_dev->nvectors =3D dev->vdev.conf.num_queues + 1; + } + qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus)); object_property_set_bool(OBJECT(vdev), true, "realized", errp); } @@ -1983,7 +1987,7 @@ static const TypeInfo virtio_blk_pci_info =3D { =20 static Property vhost_user_blk_pci_properties[] =3D { DEFINE_PROP_UINT32("class", VirtIOPCIProxy, class_code, 0), - DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 2), + DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, DEV_NVECTORS_U= NSPECIFIED), DEFINE_PROP_END_OF_LIST(), }; =20 @@ -1992,6 +1996,10 @@ static void vhost_user_blk_pci_realize(VirtIOPCIProx= y *vpci_dev, Error **errp) VHostUserBlkPCI *dev =3D VHOST_USER_BLK_PCI(vpci_dev); DeviceState *vdev =3D DEVICE(&dev->vdev); =20 + if (vpci_dev->nvectors =3D=3D DEV_NVECTORS_UNSPECIFIED) { + vpci_dev->nvectors =3D dev->vdev.num_queues + 1; + } + qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus)); object_property_set_bool(OBJECT(vdev), true, "realized", errp); } --=20 1.9.3