From patchwork Fri Jul 22 13:43:11 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Eugenio Perez Martin X-Patchwork-Id: 12926510 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 76BBBC433EF for ; Fri, 22 Jul 2022 13:43:31 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234279AbiGVNna (ORCPT ); Fri, 22 Jul 2022 09:43:30 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52758 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231807AbiGVNn3 (ORCPT ); Fri, 22 Jul 2022 09:43:29 -0400 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 8C8124D801 for ; Fri, 22 Jul 2022 06:43:27 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1658497406; 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=qlhaogS3y2q2pdfCJG/MtJuTOkwX7VOVWYlVSW/W+JI=; b=jVPNkkSYT/eZiDpVELhW7xKNne/DhtguXZ4nfUo9U4RNw8V0qzIPnm6/wo7SykBkO19j5+ OgxIiwth3lKji7izES4wS2XPKpr2SNXrwjl75yvJEbOrNqDMSiqFJDSPB7QkYHaJOXSOm9 Yh+vCTQg8q/qRecxHzFQ0IgWL7+7/vw= 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-320-qSA4YvqTNE69xLYwE990ZQ-1; Fri, 22 Jul 2022 09:43:23 -0400 X-MC-Unique: qSA4YvqTNE69xLYwE990ZQ-1 Received: from smtp.corp.redhat.com (int-mx10.intmail.prod.int.rdu2.redhat.com [10.11.54.10]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 1E63A3826A46; Fri, 22 Jul 2022 13:43:23 +0000 (UTC) Received: from eperezma.remote.csb (unknown [10.39.194.161]) by smtp.corp.redhat.com (Postfix) with ESMTP id 2CD17492C3B; Fri, 22 Jul 2022 13:43:20 +0000 (UTC) From: =?utf-8?q?Eugenio_P=C3=A9rez?= To: qemu-devel@nongnu.org Cc: Jason Wang , Harpreet Singh Anand , Cindy Lu , Cornelia Huck , kvm@vger.kernel.org, Parav Pandit , Stefan Hajnoczi , "Gonglei (Arei)" , "Michael S. Tsirkin" , Zhu Lingshan , Liuxiangdong , Gautam Dawar , Paolo Bonzini , Stefano Garzarella , Eli Cohen , Laurent Vivier Subject: [PATCH v2 0/7] ASID support in vhost-vdpa net Date: Fri, 22 Jul 2022 15:43:11 +0200 Message-Id: <20220722134318.3430667-1-eperezma@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.85 on 10.11.54.10 Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org Control VQ is the way net devices use to send changes to the device state, like the number of active queues or its mac address. QEMU needs to intercept this queue so it can track these changes and is able to migrate the device. It can do it from 1576dbb5bbc4 ("vdpa: Add x-svq to NetdevVhostVDPAOptions"). However, to enable x-svq implies to shadow all VirtIO device's virtqueues, which will damage performance. This series adds address space isolation, so the device and the guest communicate directly with them (passthrough) and CVQ communication is split in two: The guest communicates with QEMU and QEMU forwards the commands to the device. This series is based on [1], and this needs to be applied on top of that. Each one of them adds a feature on isolation and could be merged individually once conflicts are solved. Comments are welcome. Thanks! v2: - Much as commented on series [1], handle vhost_net backend through NetClientInfo callbacks instead of directly. - Fix not freeing SVQ properly when device does not support CVQ - Add BIT_ULL missed checking device's backend feature for _F_ASID. [1] https://lists.nongnu.org/archive/html/qemu-devel/2022-07/msg04009.html Eugenio Pérez (7): linux-headers: Update kernel headers to v5.19-rc1 vdpa: Use v->shadow_vqs_enabled in vhost_vdpa_svqs_start & stop vdpa: Allocate SVQ unconditionally vdpa: Add asid parameter to vhost_vdpa_dma_map/unmap vdpa: Store x-svq parameter in VhostVDPAState vhost_net: Add NetClientInfo prepare callback vdpa: Always start CVQ in SVQ mode include/hw/virtio/vhost-vdpa.h | 8 +- include/net/net.h | 2 + include/standard-headers/asm-x86/bootparam.h | 1 + include/standard-headers/drm/drm_fourcc.h | 69 ++++++++ include/standard-headers/linux/ethtool.h | 1 + include/standard-headers/linux/input.h | 1 + include/standard-headers/linux/pci_regs.h | 1 + include/standard-headers/linux/vhost_types.h | 11 +- include/standard-headers/linux/virtio_ids.h | 14 +- linux-headers/asm-arm64/kvm.h | 27 +++ linux-headers/asm-generic/unistd.h | 4 +- linux-headers/asm-riscv/kvm.h | 20 +++ linux-headers/asm-riscv/unistd.h | 3 +- linux-headers/asm-x86/kvm.h | 11 +- linux-headers/asm-x86/mman.h | 14 -- linux-headers/linux/kvm.h | 54 +++++- linux-headers/linux/userfaultfd.h | 10 +- linux-headers/linux/vfio.h | 4 +- linux-headers/linux/vhost.h | 26 ++- hw/net/vhost_net.c | 4 + hw/virtio/vhost-vdpa.c | 66 ++++---- net/vhost-vdpa.c | 168 ++++++++++++++++++- hw/virtio/trace-events | 4 +- 23 files changed, 438 insertions(+), 85 deletions(-)