From patchwork Wed Aug 26 14:36:50 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Eugenio Perez Martin X-Patchwork-Id: 11738575 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id E3494138A for ; Wed, 26 Aug 2020 14:42:36 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id B8295208E4 for ; Wed, 26 Aug 2020 14:42:36 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="afjQQ7vq" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org B8295208E4 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Received: from localhost ([::1]:41504 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1kAwdH-0007dh-Uz for patchwork-qemu-devel@patchwork.kernel.org; Wed, 26 Aug 2020 10:42:35 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:47158) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kAwb0-0002Ra-EU for qemu-devel@nongnu.org; Wed, 26 Aug 2020 10:40:14 -0400 Received: from us-smtp-delivery-1.mimecast.com ([205.139.110.120]:34595 helo=us-smtp-1.mimecast.com) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_CBC_SHA1:256) (Exim 4.90_1) (envelope-from ) id 1kAwaw-0006Vl-Vr for qemu-devel@nongnu.org; Wed, 26 Aug 2020 10:40:14 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1598452810; 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=37E0YMA1qPtt1oyY6xJg1GUok8EqO/yvBOiRrB4VVfQ=; b=afjQQ7vqKNNWCs4/aBsYyvddBMlVPmkOeRgLslNly6b3rurraU7RiJw17hbND89SnkqugS BI5TsIoXRhr0d5mGxIQOhw5scVIJOnGiOnR151vwQd5vm+xGjBWNEGS2a8TL5LVzHDSEiN bIUpUir+giIuT17uALQTOhXWIblgpEY= 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-332-5R-aLHvMPNC-ipKTzLrgoA-1; Wed, 26 Aug 2020 10:40:08 -0400 X-MC-Unique: 5R-aLHvMPNC-ipKTzLrgoA-1 Received: from smtp.corp.redhat.com (int-mx03.intmail.prod.int.phx2.redhat.com [10.5.11.13]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 25EC21006485; Wed, 26 Aug 2020 14:40:02 +0000 (UTC) Received: from eperezma.remote.csb (ovpn-115-59.ams2.redhat.com [10.36.115.59]) by smtp.corp.redhat.com (Postfix) with ESMTP id D38657D9A4; Wed, 26 Aug 2020 14:39:57 +0000 (UTC) From: =?utf-8?q?Eugenio_P=C3=A9rez?= To: qemu-devel@nongnu.org, Peter Xu Subject: [RFC v6 12/13] intel_iommu: Do not notify regular iotlb to device-iotlb notifiers Date: Wed, 26 Aug 2020 16:36:50 +0200 Message-Id: <20200826143651.7915-13-eperezma@redhat.com> In-Reply-To: <20200826143651.7915-1-eperezma@redhat.com> References: <20200625191651.5817-1-eperezma@redhat.com> <20200826143651.7915-1-eperezma@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.13 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=eperezma@redhat.com X-Mimecast-Spam-Score: 0.002 X-Mimecast-Originator: redhat.com Received-SPF: pass client-ip=205.139.110.120; envelope-from=eperezma@redhat.com; helo=us-smtp-1.mimecast.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/08/26 01:10:45 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] [fuzzy] X-Spam_score_int: -30 X-Spam_score: -3.1 X-Spam_bar: --- X-Spam_report: (-3.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.959, 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=unavailable 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: Peter Maydell , Aleksandar Rikalo , Yan Zhao , Eduardo Habkost , Juan Quintela , Jason Wang , "Michael S. Tsirkin" , Eric Auger , qemu-arm@nongnu.org, =?utf-8?q?Herv=C3=A9_Poussineau?= , Avi Kivity , Paolo Bonzini , Richard Henderson Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" This improves performance in case of netperf with vhost-net: * TCP_STREAM: From 9049.59Mbit/s to 9049.59Mbit/s (13%) * TCP_RR: From 8464.73 trans/s to 8932.703333 trans/s (5.5%) * UDP_RR: From 8562.08 trans/s to 9005.62/s (5.1%) * UDP_STREAM: No change observed (insignificant 0.1% improvement) Signed-off-by: Eugenio Pérez --- hw/i386/intel_iommu.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/hw/i386/intel_iommu.c b/hw/i386/intel_iommu.c index ddb828da1f..7620a1abbf 100644 --- a/hw/i386/intel_iommu.c +++ b/hw/i386/intel_iommu.c @@ -1960,6 +1960,12 @@ static void vtd_iotlb_domain_invalidate(IntelIOMMUState *s, uint16_t domain_id) vtd_iommu_unlock(s); QLIST_FOREACH(vtd_as, &s->vtd_as_with_notifiers, next) { + if (vtd_as->iommu.iommu_notify_flags & IOMMU_NOTIFIER_DEVIOTLB) { + /* If IOMMU memory region is DEVICE IOTLB type, it does not make + * sense to send regular IOMMU notifications. */ + continue; + } + if (!vtd_dev_to_context_entry(s, pci_bus_num(vtd_as->bus), vtd_as->devfn, &ce) && domain_id == vtd_get_domain_id(s, &ce)) {