From patchwork Thu Sep 24 03:21:07 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jason Wang X-Patchwork-Id: 260281 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=-11.1 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE, SPF_PASS autolearn=unavailable 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 C31E1C4727D for ; Thu, 24 Sep 2020 03:23:01 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 86DD023600 for ; Thu, 24 Sep 2020 03:23:01 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="KCPSyM68" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726828AbgIXDW7 (ORCPT ); Wed, 23 Sep 2020 23:22:59 -0400 Received: from us-smtp-delivery-124.mimecast.com ([216.205.24.124]:21488 "EHLO us-smtp-delivery-124.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726781AbgIXDW6 (ORCPT ); Wed, 23 Sep 2020 23:22:58 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1600917777; 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: in-reply-to:in-reply-to:references:references; bh=roAbV6FPOAWx9gZkzOd8DWSbxuYMFGVoYNhpPWU7Hyw=; b=KCPSyM684QIMnZm0WGAWRmM4o2oBmuvEo6FGTxSCyVoTfLEkagGfVdM7KKOhk1wuwdduJ7 11IbKCdZM0DCne6GDVLRmYA405eMEH14h5SS22jxfsNPeG/1SRKlWP/3lKXUlXaZbPDcQN QE+zmmT9FLdTVpTh49OGUk8ApKRoJeg= 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-409-H6YhDPIZMa6CiLbp26wgHw-1; Wed, 23 Sep 2020 23:22:53 -0400 X-MC-Unique: H6YhDPIZMa6CiLbp26wgHw-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 DAD14186DD2C; Thu, 24 Sep 2020 03:22:51 +0000 (UTC) Received: from jason-ThinkPad-X1-Carbon-6th.redhat.com (ovpn-13-193.pek2.redhat.com [10.72.13.193]) by smtp.corp.redhat.com (Postfix) with ESMTP id EF28D3782; Thu, 24 Sep 2020 03:22:35 +0000 (UTC) From: Jason Wang To: mst@redhat.com, jasowang@redhat.com Cc: lulu@redhat.com, kvm@vger.kernel.org, virtualization@lists.linux-foundation.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, rob.miller@broadcom.com, lingshan.zhu@intel.com, eperezma@redhat.com, hanand@xilinx.com, mhabets@solarflare.com, eli@mellanox.com, amorenoz@redhat.com, maxime.coquelin@redhat.com, stefanha@redhat.com, sgarzare@redhat.com Subject: [RFC PATCH 06/24] vhost-vdpa: switch to use vhost-vdpa specific IOTLB Date: Thu, 24 Sep 2020 11:21:07 +0800 Message-Id: <20200924032125.18619-7-jasowang@redhat.com> In-Reply-To: <20200924032125.18619-1-jasowang@redhat.com> References: <20200924032125.18619-1-jasowang@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.15 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org To ease the implementation of per group ASID support for vDPA device. This patch switches to use a vhost-vdpa specific IOTLB to avoid the unnecessary refactoring of the vhost core. Signed-off-by: Jason Wang --- drivers/vhost/vdpa.c | 14 ++++++++------ 1 file changed, 8 insertions(+), 6 deletions(-) diff --git a/drivers/vhost/vdpa.c b/drivers/vhost/vdpa.c index 74bef1c15a70..ec3c94f706c1 100644 --- a/drivers/vhost/vdpa.c +++ b/drivers/vhost/vdpa.c @@ -40,6 +40,7 @@ struct vhost_vdpa { struct vhost_virtqueue *vqs; struct completion completion; struct vdpa_device *vdpa; + struct vhost_iotlb *iotlb; struct device dev; struct cdev cdev; atomic_t opened; @@ -514,12 +515,11 @@ static void vhost_vdpa_iotlb_unmap(struct vhost_vdpa *v, static void vhost_vdpa_iotlb_free(struct vhost_vdpa *v) { - struct vhost_dev *dev = &v->vdev; - struct vhost_iotlb *iotlb = dev->iotlb; + struct vhost_iotlb *iotlb = v->iotlb; vhost_vdpa_iotlb_unmap(v, iotlb, 0ULL, 0ULL - 1); - kfree(dev->iotlb); - dev->iotlb = NULL; + kfree(v->iotlb); + v->iotlb = NULL; } static int perm_to_iommu_flags(u32 perm) @@ -681,7 +681,7 @@ static int vhost_vdpa_process_iotlb_msg(struct vhost_dev *dev, struct vhost_vdpa *v = container_of(dev, struct vhost_vdpa, vdev); struct vdpa_device *vdpa = v->vdpa; const struct vdpa_config_ops *ops = vdpa->config; - struct vhost_iotlb *iotlb = dev->iotlb; + struct vhost_iotlb *iotlb = v->iotlb; int r = 0; r = vhost_dev_check_owner(dev); @@ -812,12 +812,14 @@ static int vhost_vdpa_open(struct inode *inode, struct file *filep) r = vhost_vdpa_alloc_domain(v); if (r) - goto err_init_iotlb; + goto err_alloc_domain; filep->private_data = v; return 0; +err_alloc_domain: + vhost_vdpa_iotlb_free(v); err_init_iotlb: vhost_vdpa_cleanup(v); err: