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=-13.6 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS 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 48D81C433E0 for ; Thu, 21 Jan 2021 11:12:43 +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 A2BD123877 for ; Thu, 21 Jan 2021 11:12:42 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org A2BD123877 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]:48094 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1l2XtJ-0005dS-71 for qemu-devel@archiver.kernel.org; Thu, 21 Jan 2021 06:12:41 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]:47168) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1l2Xnq-0006fi-RA for qemu-devel@nongnu.org; Thu, 21 Jan 2021 06:07:02 -0500 Received: from us-smtp-delivery-124.mimecast.com ([63.128.21.124]:54950) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_CBC_SHA1:256) (Exim 4.90_1) (envelope-from ) id 1l2Xnp-0006oW-3U for qemu-devel@nongnu.org; Thu, 21 Jan 2021 06:07:02 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1611227220; 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=mWEw3+5k7i3rGOT+RAkM8dvXGyIW//mZaV3sM6Sli0E=; b=HVaEdeA+u4/5hglNoww89y8pK3JHeSV+V23SV4DJUtFIgkK23Qt9wis2sn+5Zcg05iqtnj i6ZxANWV30hzL9kjZox6Inn/1HuOsCbS3pzq1D7GVNhKNqtwdCFaPOzlWhDmOlRQyaBxf2 Tm+Hsv+tVTo1QEUTBDPrP7inzTf8rL8= 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-86-AtYIAb-5OBmNdBpdh8-ZHg-1; Thu, 21 Jan 2021 06:06:56 -0500 X-MC-Unique: AtYIAb-5OBmNdBpdh8-ZHg-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 8478E107ACF5; Thu, 21 Jan 2021 11:06:55 +0000 (UTC) Received: from t480s.redhat.com (ovpn-115-70.ams2.redhat.com [10.36.115.70]) by smtp.corp.redhat.com (Postfix) with ESMTP id 07FF810013BD; Thu, 21 Jan 2021 11:06:46 +0000 (UTC) From: David Hildenbrand To: qemu-devel@nongnu.org Subject: [PATCH v5 05/11] vfio: Query and store the maximum number of possible DMA mappings Date: Thu, 21 Jan 2021 12:05:34 +0100 Message-Id: <20210121110540.33704-6-david@redhat.com> In-Reply-To: <20210121110540.33704-1-david@redhat.com> References: <20210121110540.33704-1-david@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=david@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Transfer-Encoding: 8bit Content-Type: text/plain; charset="US-ASCII" Received-SPF: pass client-ip=63.128.21.124; envelope-from=david@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -29 X-Spam_score: -3.0 X-Spam_bar: --- X-Spam_report: (-3.0 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.167, 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_H4=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: Pankaj Gupta , Wei Yang , David Hildenbrand , "Michael S. Tsirkin" , "Dr . David Alan Gilbert" , Peter Xu , Marek Kedzierski , Auger Eric , Alex Williamson , teawater , Jonathan Cameron , Paolo Bonzini , Igor Mammedov Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Let's query the maximum number of possible DMA mappings by querying the available mappings when creating the container (before any mappings are created). We'll use this informaton soon to perform some sanity checks and warn the user. Reviewed-by: Alex Williamson Acked-by: Alex Williamson Cc: Paolo Bonzini Cc: "Michael S. Tsirkin" Cc: Alex Williamson Cc: Dr. David Alan Gilbert Cc: Igor Mammedov Cc: Pankaj Gupta Cc: Peter Xu Cc: Auger Eric Cc: Wei Yang Cc: teawater Cc: Marek Kedzierski Signed-off-by: David Hildenbrand --- hw/vfio/common.c | 4 ++++ include/hw/vfio/vfio-common.h | 1 + 2 files changed, 5 insertions(+) diff --git a/hw/vfio/common.c b/hw/vfio/common.c index f68370de6c..78be813a53 100644 --- a/hw/vfio/common.c +++ b/hw/vfio/common.c @@ -1937,6 +1937,7 @@ static int vfio_connect_container(VFIOGroup *group, AddressSpace *as, container->fd = fd; container->error = NULL; container->dirty_pages_supported = false; + container->dma_max_mappings = 0; QLIST_INIT(&container->giommu_list); QLIST_INIT(&container->hostwin_list); QLIST_INIT(&container->vrdl_list); @@ -1968,7 +1969,10 @@ static int vfio_connect_container(VFIOGroup *group, AddressSpace *as, vfio_host_win_add(container, 0, (hwaddr)-1, info->iova_pgsizes); container->pgsizes = info->iova_pgsizes; + /* The default in the kernel ("dma_entry_limit") is 65535. */ + container->dma_max_mappings = 65535; if (!ret) { + vfio_get_info_dma_avail(info, &container->dma_max_mappings); vfio_get_iommu_info_migration(container, info); } g_free(info); diff --git a/include/hw/vfio/vfio-common.h b/include/hw/vfio/vfio-common.h index af6f8d1b22..4b28c6e8ac 100644 --- a/include/hw/vfio/vfio-common.h +++ b/include/hw/vfio/vfio-common.h @@ -88,6 +88,7 @@ typedef struct VFIOContainer { uint64_t dirty_pgsizes; uint64_t max_dirty_bitmap_size; unsigned long pgsizes; + unsigned int dma_max_mappings; QLIST_HEAD(, VFIOGuestIOMMU) giommu_list; QLIST_HEAD(, VFIOHostDMAWindow) hostwin_list; QLIST_HEAD(, VFIOGroup) group_list; -- 2.29.2