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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id C660EC433FE for ; Tue, 11 Oct 2022 10:42:08 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229812AbiJKKmH (ORCPT ); Tue, 11 Oct 2022 06:42:07 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:37178 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229808AbiJKKmF (ORCPT ); Tue, 11 Oct 2022 06:42:05 -0400 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E34187FF84 for ; Tue, 11 Oct 2022 03:42:04 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1665484923; 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=KFzwfI4xWWrXGzPF6GL7m7oIfEjaLoepedAPPZ02oI4=; b=Q8hXMYRf0+few8PDZ7j3FqmwPKRPeAbB8U+fihWCMytPxf8LQIKNHJr9p1Nc/uuykfZNMe X9phTxwRdHlxkv4gW9PE7MD9kB3qZAgO5v9QD625hCv4UCWqAMaXPVaaalcMT3zV9MyaeA 3YqG9TZxLixZ6Wo9L0i+NDeYpJ4AHE8= 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-77-dClyIeZzMOWJ4f8Yee3m4w-1; Tue, 11 Oct 2022 06:42:00 -0400 X-MC-Unique: dClyIeZzMOWJ4f8Yee3m4w-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 15FAF299E750; Tue, 11 Oct 2022 10:42:00 +0000 (UTC) Received: from eperezma.remote.csb (unknown [10.39.193.104]) by smtp.corp.redhat.com (Postfix) with ESMTP id D01BA492B09; Tue, 11 Oct 2022 10:41:56 +0000 (UTC) From: =?UTF-8?q?Eugenio=20P=C3=A9rez?= To: qemu-devel@nongnu.org Cc: Gautam Dawar , "Michael S. Tsirkin" , Zhu Lingshan , Jason Wang , Si-Wei Liu , Paolo Bonzini , Eli Cohen , Parav Pandit , Laurent Vivier , Stefano Garzarella , Stefan Hajnoczi , "Gonglei (Arei)" , Cindy Lu , Liuxiangdong , Cornelia Huck , kvm@vger.kernel.org, Harpreet Singh Anand Subject: [PATCH v5 0/6] ASID support in vhost-vdpa net Date: Tue, 11 Oct 2022 12:41:48 +0200 Message-Id: <20221011104154.1209338-1-eperezma@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable X-Scanned-By: MIMEDefang 3.1 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=0D the number of active queues or its mac address.=0D =0D QEMU needs to intercept this queue so it can track these changes and is abl= e to=0D migrate the device. It can do it from 1576dbb5bbc4 ("vdpa: Add x-svq to=0D NetdevVhostVDPAOptions"). However, to enable x-svq implies to shadow all Vi= rtIO=0D device's virtqueues, which will damage performance.=0D =0D This series adds address space isolation, so the device and the guest=0D communicate directly with them (passthrough) and CVQ communication is split= in=0D two: The guest communicates with QEMU and QEMU forwards the commands to the= =0D device.=0D =0D Comments are welcome. Thanks!=0D =0D v5:=0D - Move vring state in vhost_vdpa_get_vring_group instead of using a=0D parameter.=0D - Rename VHOST_VDPA_NET_CVQ_PASSTHROUGH to VHOST_VDPA_NET_DATA_ASID=0D =0D v4:=0D - Rebased on last CVQ start series, that allocated CVQ cmd bufs at load=0D - Squash vhost_vdpa_cvq_group_is_independent.=0D - Do not check for cvq index on vhost_vdpa_net_prepare, we only have one=0D that callback registered in that NetClientInfo.=0D - Add comment specifying behavior if device does not support _F_ASID=0D - Update headers to a later Linux commit to not to remove SETUP_RNG_SEED=0D =0D v3:=0D - Do not return an error but just print a warning if vdpa device initializa= tion=0D returns failure while getting AS num of VQ groups=0D - Delete extra newline=0D =0D v2:=0D - Much as commented on series [1], handle vhost_net backend through=0D NetClientInfo callbacks instead of directly.=0D - Fix not freeing SVQ properly when device does not support CVQ=0D - Add BIT_ULL missed checking device's backend feature for _F_ASID.=0D =0D Eugenio P=C3=A9rez (6):=0D vdpa: Use v->shadow_vqs_enabled in vhost_vdpa_svqs_start & stop=0D vdpa: Allocate SVQ unconditionally=0D vdpa: Add asid parameter to vhost_vdpa_dma_map/unmap=0D vdpa: Store x-svq parameter in VhostVDPAState=0D vdpa: Add listener_shadow_vq to vhost_vdpa=0D vdpa: Always start CVQ in SVQ mode=0D =0D include/hw/virtio/vhost-vdpa.h | 10 ++-=0D hw/virtio/vhost-vdpa.c | 75 ++++++++++---------=0D net/vhost-vdpa.c | 128 ++++++++++++++++++++++++++++++---=0D hw/virtio/trace-events | 4 +-=0D 4 files changed, 170 insertions(+), 47 deletions(-)=0D =0D -- =0D 2.31.1=0D =0D