From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.5 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 251FBC43461 for ; Wed, 9 Sep 2020 08:21:00 +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 B50F62087C for ; Wed, 9 Sep 2020 08:20:59 +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="PYLuXWdW" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org B50F62087C 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+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:48834 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1kFvLe-0005zM-29 for qemu-devel@archiver.kernel.org; Wed, 09 Sep 2020 04:20:58 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:33186) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kFvIZ-0001p7-Qh for qemu-devel@nongnu.org; Wed, 09 Sep 2020 04:17:47 -0400 Received: from us-smtp-delivery-124.mimecast.com ([63.128.21.124]:33985) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_CBC_SHA1:256) (Exim 4.90_1) (envelope-from ) id 1kFvIY-0003ls-52 for qemu-devel@nongnu.org; Wed, 09 Sep 2020 04:17:47 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1599639465; 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; bh=O9KyATISiZGeakA/smiHhII0pXyg7vLMCyRzJUo4cZU=; b=PYLuXWdWBid9N2hB+YtihcAUy7PQfVgpeWuOK2D57gFFAyhyybPZycJuekkE6QdlIHPR0l Eepkl8XaIsxzxvNuya/zggRr83dQemBxPhPCEclS34AleSp6eaC8vIrg6bWq13rnwH56ry psaHjJ97O8D/rjQKXWEoOkh1mnVXXx4= 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-12-7wv1Re7-OM-6mmDmAqSFvw-1; Wed, 09 Sep 2020 04:17:43 -0400 X-MC-Unique: 7wv1Re7-OM-6mmDmAqSFvw-1 Received: from smtp.corp.redhat.com (int-mx07.intmail.prod.int.phx2.redhat.com [10.5.11.22]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id B12E0800400; Wed, 9 Sep 2020 08:17:42 +0000 (UTC) Received: from jason-ThinkPad-X1-Carbon-6th.redhat.com (ovpn-12-24.pek2.redhat.com [10.72.12.24]) by smtp.corp.redhat.com (Postfix) with ESMTP id 4F5981002D54; Wed, 9 Sep 2020 08:17:33 +0000 (UTC) From: Jason Wang To: mst@redhat.com, qemu-devel@nongnu.org Subject: [PATCH] pci: advertise a page aligned ATS Date: Wed, 9 Sep 2020 16:17:31 +0800 Message-Id: <20200909081731.24688-1-jasowang@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.84 on 10.5.11.22 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=jasowang@redhat.com X-Mimecast-Spam-Score: 0.001 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 8bit Received-SPF: pass client-ip=63.128.21.124; envelope-from=jasowang@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/09/09 03:25:02 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] [fuzzy] 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_H5=0.001, RCVD_IN_MSPIKE_WL=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: eperezma@redhat.com, Jason Wang , qemu-stable@nongnu.org, peterx@redhat.com Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" After Linux kernel commit 61363c1474b1 ("iommu/vt-d: Enable ATS only if the device uses page aligned address."), ATS will be only enabled if device advertises a page aligned request. Unfortunately, vhost-net is the only user and we don't advertise the aligned request capability in the past since both vhost IOTLB and address_space_get_iotlb_entry() can support non page aligned request. Though it's not clear that if the above kernel commit makes sense. Let's advertise a page aligned ATS here to make vhost device IOTLB work with Intel IOMMU again. Note that in the future we may extend pcie_ats_init() to accept parameters like queue depth and page alignment. Cc: qemu-stable@nongnu.org Signed-off-by: Jason Wang --- hw/pci/pcie.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/hw/pci/pcie.c b/hw/pci/pcie.c index 5b48bae0f6..d4010cf8f3 100644 --- a/hw/pci/pcie.c +++ b/hw/pci/pcie.c @@ -971,8 +971,9 @@ void pcie_ats_init(PCIDevice *dev, uint16_t offset) dev->exp.ats_cap = offset; - /* Invalidate Queue Depth 0, Page Aligned Request 0 */ - pci_set_word(dev->config + offset + PCI_ATS_CAP, 0); + /* Invalidate Queue Depth 0, Page Aligned Request 1 */ + pci_set_word(dev->config + offset + PCI_ATS_CAP, + PCI_ATS_CAP_PAGE_ALIGNED); /* STU 0, Disabled by default */ pci_set_word(dev->config + offset + PCI_ATS_CTRL, 0); -- 2.20.1