From patchwork Mon Jun 26 07:34:22 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Albert Esteve X-Patchwork-Id: 13292436 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org 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 smtp.lore.kernel.org (Postfix) with ESMTPS id A46F6EB64DA for ; Mon, 26 Jun 2023 07:35:27 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1qDgkI-0003Ft-ED; Mon, 26 Jun 2023 03:34:46 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1qDgkF-0003FE-Fu for qemu-devel@nongnu.org; Mon, 26 Jun 2023 03:34:43 -0400 Received: from us-smtp-delivery-124.mimecast.com ([170.10.133.124]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1qDgkD-0007AY-0e for qemu-devel@nongnu.org; Mon, 26 Jun 2023 03:34:43 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1687764878; 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=tD4BlpJCMG1U3zdAa3RbxKDX7iStHZj0SKo+P+p5AMQ=; b=BjU+BCDdbPofMawPkIdQt2WM0fseDLN4UGLnKUUgZiyl6eYj7qeqnG8fzds7wZ+D8IwI1M 9vAiGbOzEvRjXjJUNdUchfjTvu6BLnEmP2ivgP5+ZkDISnG5GUW7C51x9nf44o6SG2VB7V YPu9kFKRJHXfJ8/8Dqw/VTjk6VFfNiE= Received: from mimecast-mx02.redhat.com (mx3-rdu2.redhat.com [66.187.233.73]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-528-CVg46_jBN2KFpsPjODZoXA-1; Mon, 26 Jun 2023 03:34:34 -0400 X-MC-Unique: CVg46_jBN2KFpsPjODZoXA-1 Received: from smtp.corp.redhat.com (int-mx09.intmail.prod.int.rdu2.redhat.com [10.11.54.9]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 40F7B3C0ED46; Mon, 26 Jun 2023 07:34:34 +0000 (UTC) Received: from localhost.localdomain (unknown [10.45.225.38]) by smtp.corp.redhat.com (Postfix) with ESMTP id B59B1492B03; Mon, 26 Jun 2023 07:34:32 +0000 (UTC) From: Albert Esteve To: qemu-devel@nongnu.org Cc: marcandre.lureau@gmail.com, "Michael S. Tsirkin" , cohuck@redhat.com, Albert Esteve , Fam Zheng , kraxel@redhat.com Subject: [PATCH v4 0/4] Virtio shared dma-buf Date: Mon, 26 Jun 2023 09:34:22 +0200 Message-Id: <20230626073426.285659-1-aesteve@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.1 on 10.11.54.9 Received-SPF: pass client-ip=170.10.133.124; envelope-from=aesteve@redhat.com; helo=us-smtp-delivery-124.mimecast.com 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=-0.001, 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=-1, RCVD_IN_MSPIKE_WL=-0.01, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org v1 link -> https://lists.gnu.org/archive/html/qemu-devel/2023-05/msg00598.html v2 link -> https://lists.gnu.org/archive/html/qemu-devel/2023-05/msg04530.html v3 link -> https://lists.gnu.org/archive/html/qemu-devel/2023-05/msg06126.html v3 -> v4: - Split the different message types for shared objects into different messages - Add a vhost-user feature bit to negotiate the shared object feature - Minor improvements following suggestions This patch covers the required steps to add support for virtio cross-device resource sharing[1], which support is already available in the kernel. The main usecase will be sharing dma buffers from virtio-gpu devices (as the exporter -see VIRTIO_GPU_CMD_RESOURCE_ASSIGN_UUID in [2]), to virtio-video (under discussion) devices (as the buffer-user or importer). Therefore, even though virtio specs talk about resources or objects[3], this patch adds the infrastructure with dma-bufs in mind. Note that virtio specs let the devices themselves define what a vitio object is. These are the main parts that are covered in the patch: - Add hash function to uuid module - Shared resources table, to hold all resources that can be shared in the host and their assigned UUID - Internal shared table API for virtio devices to add, lookup and remove resources - Unit test to verify the API - New messages to the vhost-user protocol to allow backend to interact with the shared table API through the control socket - New vhost-user feature bit to enable shared objects feature Applies cleanly to b455ce4c2f300c8ba47cba7232dd03261368a4cb [1] - https://lwn.net/Articles/828988/ [2] - https://docs.oasis-open.org/virtio/virtio/v1.2/csd01/virtio-v1.2-csd01.html#x1-3730006 [3] - https://docs.oasis-open.org/virtio/virtio/v1.2/csd01/virtio-v1.2-csd01.html#x1-10500011 Albert Esteve (4): uuid: add a hash function virtio-dmabuf: introduce virtio-dmabuf vhost-user: add shared_object msg vhost-user: refactor send_resp code MAINTAINERS | 7 ++ docs/interop/vhost-user.rst | 42 ++++++++ hw/display/meson.build | 1 + hw/display/virtio-dmabuf.c | 90 +++++++++++++++++ hw/virtio/vhost-user.c | 115 +++++++++++++++++++--- include/hw/virtio/virtio-dmabuf.h | 59 +++++++++++ include/qemu/uuid.h | 2 + subprojects/libvhost-user/libvhost-user.c | 101 +++++++++++++++++++ subprojects/libvhost-user/libvhost-user.h | 53 +++++++++- tests/unit/meson.build | 1 + tests/unit/test-uuid.c | 27 +++++ tests/unit/test-virtio-dmabuf.c | 112 +++++++++++++++++++++ util/uuid.c | 14 +++ 13 files changed, 610 insertions(+), 14 deletions(-) create mode 100644 hw/display/virtio-dmabuf.c create mode 100644 include/hw/virtio/virtio-dmabuf.h create mode 100644 tests/unit/test-virtio-dmabuf.c