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=-18.7 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 321A4C64E7B for ; Mon, 30 Nov 2020 03:07:42 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id D679020757 for ; Mon, 30 Nov 2020 03:07:41 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="Qwu2pn4A" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726521AbgK3DHZ (ORCPT ); Sun, 29 Nov 2020 22:07:25 -0500 Received: from us-smtp-delivery-124.mimecast.com ([216.205.24.124]:50935 "EHLO us-smtp-delivery-124.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726260AbgK3DHY (ORCPT ); Sun, 29 Nov 2020 22:07:24 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1606705557; 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=dnsVtndyELHsaur81QLe69cRyRjj10mlyd0UTsFRal0=; b=Qwu2pn4AeLGLo/9HwhDzGUxroxED0dtcWVFSRCNIVDOvDgkCmUNUTIbXY/oxlyjQ18PDgZ r/tN6cawoXHyI3Ea1jMALDXVKPVST8mbluV+OZIgPs0iTcsKAcEv+wvT+lWhwUy4D/XFFh 1CEi2IYWPeUM0hm/8+tdnUUvQIgKFOc= 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-179-W1QyoK9aODi8B7--ZvCdAA-1; Sun, 29 Nov 2020 22:05:55 -0500 X-MC-Unique: W1QyoK9aODi8B7--ZvCdAA-1 Received: from smtp.corp.redhat.com (int-mx02.intmail.prod.int.phx2.redhat.com [10.5.11.12]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id ABB2B879514; Mon, 30 Nov 2020 03:05:54 +0000 (UTC) Received: from [10.72.13.173] (ovpn-13-173.pek2.redhat.com [10.72.13.173]) by smtp.corp.redhat.com (Postfix) with ESMTP id AE53460C4D; Mon, 30 Nov 2020 03:05:45 +0000 (UTC) Subject: Re: [PATCH v2 03/17] vdpa_sim: remove hard-coded virtq count To: Stefano Garzarella , virtualization@lists.linux-foundation.org Cc: Stefan Hajnoczi , linux-kernel@vger.kernel.org, Laurent Vivier , Max Gurtovoy , "Michael S. Tsirkin" , Eli Cohen References: <20201126144950.92850-1-sgarzare@redhat.com> <20201126144950.92850-4-sgarzare@redhat.com> From: Jason Wang Message-ID: <5e229e63-d127-a4dc-bc0a-c34a4a661cf6@redhat.com> Date: Mon, 30 Nov 2020 11:05:44 +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: <20201126144950.92850-4-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 10.5.11.12 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 2020/11/26 下午10:49, Stefano Garzarella wrote: > From: Max Gurtovoy > > Add a new attribute that will define the number of virt queues to be > created for the vdpasim device. > > Signed-off-by: Max Gurtovoy > [sgarzare: replace kmalloc_array() with kcalloc()] > Signed-off-by: Stefano Garzarella Acked-by: Jason Wang > --- > v1: > - use kcalloc() instead of kmalloc_array() since some function expects > variables initialized to zero > --- > drivers/vdpa/vdpa_sim/vdpa_sim.c | 18 +++++++++++++----- > 1 file changed, 13 insertions(+), 5 deletions(-) > > diff --git a/drivers/vdpa/vdpa_sim/vdpa_sim.c b/drivers/vdpa/vdpa_sim/vdpa_sim.c > index c6eaf62df8ec..ad72f7b1a4eb 100644 > --- a/drivers/vdpa/vdpa_sim/vdpa_sim.c > +++ b/drivers/vdpa/vdpa_sim/vdpa_sim.c > @@ -57,7 +57,7 @@ static u64 vdpasim_features = (1ULL << VIRTIO_F_ANY_LAYOUT) | > /* State of each vdpasim device */ > struct vdpasim { > struct vdpa_device vdpa; > - struct vdpasim_virtqueue vqs[VDPASIM_VQ_NUM]; > + struct vdpasim_virtqueue *vqs; > struct work_struct work; > /* spinlock to synchronize virtqueue state */ > spinlock_t lock; > @@ -67,6 +67,7 @@ struct vdpasim { > u32 status; > u32 generation; > u64 features; > + int nvqs; > /* spinlock to synchronize iommu table */ > spinlock_t iommu_lock; > }; > @@ -131,7 +132,7 @@ static void vdpasim_reset(struct vdpasim *vdpasim) > { > int i; > > - for (i = 0; i < VDPASIM_VQ_NUM; i++) > + for (i = 0; i < vdpasim->nvqs; i++) > vdpasim_vq_reset(&vdpasim->vqs[i]); > > spin_lock(&vdpasim->iommu_lock); > @@ -337,7 +338,7 @@ static struct vdpasim *vdpasim_create(void) > const struct vdpa_config_ops *ops; > struct vdpasim *vdpasim; > struct device *dev; > - int ret = -ENOMEM; > + int i, ret = -ENOMEM; > > if (batch_mapping) > ops = &vdpasim_net_batch_config_ops; > @@ -348,6 +349,7 @@ static struct vdpasim *vdpasim_create(void) > if (!vdpasim) > goto err_alloc; > > + vdpasim->nvqs = VDPASIM_VQ_NUM; > INIT_WORK(&vdpasim->work, vdpasim_work); > spin_lock_init(&vdpasim->lock); > spin_lock_init(&vdpasim->iommu_lock); > @@ -358,6 +360,11 @@ static struct vdpasim *vdpasim_create(void) > goto err_iommu; > set_dma_ops(dev, &vdpasim_dma_ops); > > + vdpasim->vqs = kcalloc(vdpasim->nvqs, sizeof(struct vdpasim_virtqueue), > + GFP_KERNEL); > + if (!vdpasim->vqs) > + goto err_iommu; > + > vdpasim->iommu = vhost_iotlb_alloc(2048, 0); > if (!vdpasim->iommu) > goto err_iommu; > @@ -376,8 +383,8 @@ static struct vdpasim *vdpasim_create(void) > eth_random_addr(vdpasim->config.mac); > } > > - vringh_set_iotlb(&vdpasim->vqs[0].vring, vdpasim->iommu); > - vringh_set_iotlb(&vdpasim->vqs[1].vring, vdpasim->iommu); > + for (i = 0; i < vdpasim->nvqs; i++) > + vringh_set_iotlb(&vdpasim->vqs[i].vring, vdpasim->iommu); > > vdpasim->vdpa.dma_dev = dev; > ret = vdpa_register_device(&vdpasim->vdpa); > @@ -646,6 +653,7 @@ static void vdpasim_free(struct vdpa_device *vdpa) > kfree(vdpasim->buffer); > if (vdpasim->iommu) > vhost_iotlb_free(vdpasim->iommu); > + kfree(vdpasim->vqs); > } > > static const struct vdpa_config_ops vdpasim_net_config_ops = { 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 8DA89C64E7B for ; Mon, 30 Nov 2020 03:06:04 +0000 (UTC) Received: from silver.osuosl.org (smtp3.osuosl.org [140.211.166.136]) (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 1276220757 for ; Mon, 30 Nov 2020 03:06:03 +0000 (UTC) Authentication-Results: mail.kernel.org; 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