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=-3.9 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=no 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 98A4AC4363A for ; Fri, 23 Oct 2020 02:25:17 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 2C56521556 for ; Fri, 23 Oct 2020 02:25:17 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="ixzgO9pN" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S374589AbgJWCZQ (ORCPT ); Thu, 22 Oct 2020 22:25:16 -0400 Received: from us-smtp-delivery-124.mimecast.com ([63.128.21.124]:53442 "EHLO us-smtp-delivery-124.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S374548AbgJWCZP (ORCPT ); Thu, 22 Oct 2020 22:25:15 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1603419914; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding; bh=XBDq/dF8AYxxnodSggGeabhLd4I0L4Fwx/764jAbR9o=; b=ixzgO9pNIZEeEuToSsBhCjUwOYGJ4zT2Vahx416uRMGGTKmkx9zirNivF7hgO0eh+PxDGh 2NMeyXxZsu7I31UG5eedd2abK1wQAQDUtuy3HaFwV7aAsmOjjVFF1gx0EFs5PVFK40usYC IPi8ioAAU4n5QldnvVZCnx3z2k40mL8= 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-542-6U_Og_7LNIK37hqKnwp8jw-1; Thu, 22 Oct 2020 22:25:10 -0400 X-MC-Unique: 6U_Og_7LNIK37hqKnwp8jw-1 Received: from smtp.corp.redhat.com (int-mx05.intmail.prod.int.phx2.redhat.com [10.5.11.15]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 585C080F044; Fri, 23 Oct 2020 02:25:08 +0000 (UTC) Received: from jason-ThinkPad-X1-Carbon-6th.redhat.com (ovpn-13-85.pek2.redhat.com [10.72.13.85]) by smtp.corp.redhat.com (Postfix) with ESMTP id 9E9985576E; Fri, 23 Oct 2020 02:24:56 +0000 (UTC) From: Jason Wang To: mst@redhat.com, virtualization@lists.linux-foundation.org, linux-kernel@vger.kernel.org Cc: rob.miller@broadcom.com, lingshan.zhu@intel.com, eperezma@redhat.com, lulu@redhat.com, shahafs@mellanox.com, hanand@xilinx.com, mhabets@solarflare.com, gdawar@xilinx.com, saugatm@xilinx.com, vmireyno@marvell.com, zhangweining@ruijie.com.cn, eli@mellanox.com, Jason Wang Subject: [PATCH V3 0/3] vDPA: API for reporting IOVA range Date: Fri, 23 Oct 2020 10:24:51 +0800 Message-Id: <20201023022454.24402-1-jasowang@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Scanned-By: MIMEDefang 2.79 on 10.5.11.15 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi All: This series introduces API for reporing IOVA range. This is a must for userspace to work correclty: - for the process that uses vhost-vDPA directly, the IOVA must be allocated from this range. - for VM(qemu), when vIOMMU is not enabled, fail early if GPA is out of range - for VM(qemu), when vIOMMU is enabled, determine a valid guest address width and then guest IOVA allocator can behave correctly. Please review. Changes from V2: - silent build warnings Changes from V1: - do not mandate get_iova_range() for device with its own DMA translation logic and assume a [0, ULLONG_MAX] range - mandate IOVA range only for IOMMU that forcing aperture - forbid the map which is out of the IOVA range in vhost-vDPA Jason Wang (3): vdpa: introduce config op to get valid iova range vhost: vdpa: report iova range vdpa_sim: implement get_iova_range() drivers/vdpa/vdpa_sim/vdpa_sim.c | 12 ++++++++++ drivers/vhost/vdpa.c | 40 ++++++++++++++++++++++++++++++++ include/linux/vdpa.h | 15 ++++++++++++ include/uapi/linux/vhost.h | 4 ++++ include/uapi/linux/vhost_types.h | 9 +++++++ 5 files changed, 80 insertions(+) -- 2.20.1