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=-17.3 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,NICE_REPLY_A, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 autolearn=ham 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 B0CB1C433FE for ; Mon, 7 Dec 2020 05:24:47 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 7DC8322838 for ; Mon, 7 Dec 2020 05:24:47 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726404AbgLGFYb (ORCPT ); Mon, 7 Dec 2020 00:24:31 -0500 Received: from us-smtp-delivery-124.mimecast.com ([63.128.21.124]:57387 "EHLO us-smtp-delivery-124.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725877AbgLGFY2 (ORCPT ); Mon, 7 Dec 2020 00:24:28 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1607318582; 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: in-reply-to:in-reply-to:references:references; bh=G3sqomrhyZHKdY0RKEtJNlFIqOnxuyXyHNpvoUxGvEM=; b=UcnAEzHTTUlE/JYAq4jkgeimSeZE93dB8e2wukNFpx0Z5J4ji9+wgj12+C//5R2eIT0opG NNqiB22rMv0HZEFjAq9LuyCXsHZ0G3RK0hBljGQ2vkTx3F73uWydSouM1RAcfm3E3Kg624 k+BhWdYyve3mnCGamHuKXgdZQ1rTOIU= 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-158-F7t2Nj1aMo-RZ8LZo9iGNQ-1; Mon, 07 Dec 2020 00:22:59 -0500 X-MC-Unique: F7t2Nj1aMo-RZ8LZo9iGNQ-1 Received: from smtp.corp.redhat.com (int-mx03.intmail.prod.int.phx2.redhat.com [10.5.11.13]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 1498C858181; Mon, 7 Dec 2020 05:22:58 +0000 (UTC) Received: from [10.72.13.171] (ovpn-13-171.pek2.redhat.com [10.72.13.171]) by smtp.corp.redhat.com (Postfix) with ESMTP id 1092C60CED; Mon, 7 Dec 2020 05:22:43 +0000 (UTC) Subject: Re: [PATCH v3 12/19] vdpa_sim: make 'config' generic and usable for any device type To: Stefano Garzarella , virtualization@lists.linux-foundation.org Cc: Stefan Hajnoczi , "Michael S. Tsirkin" , Oren Duer , Laurent Vivier , linux-kernel@vger.kernel.org, Max Gurtovoy , Shahaf Shuler , Eli Cohen References: <20201203170511.216407-1-sgarzare@redhat.com> <20201203170511.216407-13-sgarzare@redhat.com> From: Jason Wang Message-ID: Date: Mon, 7 Dec 2020 13:22:42 +0800 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.10.0 MIME-Version: 1.0 In-Reply-To: <20201203170511.216407-13-sgarzare@redhat.com> Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 8bit Content-Language: en-US X-Scanned-By: MIMEDefang 2.79 on 10.5.11.13 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 2020/12/4 上午1:05, Stefano Garzarella wrote: > Add new 'config_size' attribute in 'vdpasim_dev_attr' and allocates > 'config' dynamically to support any device types. > > Signed-off-by: Stefano Garzarella > --- > drivers/vdpa/vdpa_sim/vdpa_sim.c | 17 +++++++++++++---- > 1 file changed, 13 insertions(+), 4 deletions(-) Acked-by: Jason Wang > > diff --git a/drivers/vdpa/vdpa_sim/vdpa_sim.c b/drivers/vdpa/vdpa_sim/vdpa_sim.c > index 949f4231d08a..fe71ed7890e1 100644 > --- a/drivers/vdpa/vdpa_sim/vdpa_sim.c > +++ b/drivers/vdpa/vdpa_sim/vdpa_sim.c > @@ -62,6 +62,7 @@ struct vdpasim_virtqueue { > > struct vdpasim_dev_attr { > u64 supported_features; > + size_t config_size; > int nvqs; > u32 id; > > @@ -76,7 +77,8 @@ struct vdpasim { > struct vdpasim_dev_attr dev_attr; > /* spinlock to synchronize virtqueue state */ > spinlock_t lock; > - struct virtio_net_config config; > + /* virtio config according to device type */ > + void *config; > struct vhost_iotlb *iommu; > void *buffer; > u32 status; > @@ -376,6 +378,10 @@ static struct vdpasim *vdpasim_create(struct vdpasim_dev_attr *dev_attr) > goto err_iommu; > set_dma_ops(dev, &vdpasim_dma_ops); > > + vdpasim->config = kzalloc(dev_attr->config_size, GFP_KERNEL); > + if (!vdpasim->config) > + goto err_iommu; > + > vdpasim->vqs = kcalloc(dev_attr->nvqs, sizeof(struct vdpasim_virtqueue), > GFP_KERNEL); > if (!vdpasim->vqs) > @@ -516,7 +522,8 @@ static u64 vdpasim_get_features(struct vdpa_device *vdpa) > static int vdpasim_set_features(struct vdpa_device *vdpa, u64 features) > { > struct vdpasim *vdpasim = vdpa_to_sim(vdpa); > - struct virtio_net_config *config = &vdpasim->config; > + struct virtio_net_config *config = > + (struct virtio_net_config *)vdpasim->config; > > /* DMA mapping must be done by driver */ > if (!(features & (1ULL << VIRTIO_F_ACCESS_PLATFORM))) > @@ -588,8 +595,8 @@ static void vdpasim_get_config(struct vdpa_device *vdpa, unsigned int offset, > { > struct vdpasim *vdpasim = vdpa_to_sim(vdpa); > > - if (offset + len < sizeof(struct virtio_net_config)) > - memcpy(buf, (u8 *)&vdpasim->config + offset, len); > + if (offset + len < vdpasim->dev_attr.config_size) > + memcpy(buf, vdpasim->config + offset, len); > } > > static void vdpasim_set_config(struct vdpa_device *vdpa, unsigned int offset, > @@ -676,6 +683,7 @@ static void vdpasim_free(struct vdpa_device *vdpa) > if (vdpasim->iommu) > vhost_iotlb_free(vdpasim->iommu); > kfree(vdpasim->vqs); > + kfree(vdpasim->config); > } > > static const struct vdpa_config_ops vdpasim_config_ops = { > @@ -738,6 +746,7 @@ static int __init vdpasim_dev_init(void) > dev_attr.id = VIRTIO_ID_NET; > dev_attr.supported_features = VDPASIM_NET_FEATURES; > dev_attr.nvqs = VDPASIM_VQ_NUM; > + dev_attr.config_size = sizeof(struct virtio_net_config); > dev_attr.work_fn = vdpasim_net_work; > > vdpasim_dev = vdpasim_create(&dev_attr); 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=-15.1 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,NICE_REPLY_A,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, USER_AGENT_SANE_1 autolearn=ham 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 CE98FC433FE for ; Mon, 7 Dec 2020 05:23:07 +0000 (UTC) Received: from whitealder.osuosl.org (smtp1.osuosl.org [140.211.166.138]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 6FACC221E2 for ; Mon, 7 Dec 2020 05:23:07 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 6FACC221E2 Authentication-Results: mail.kernel.org; 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