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 C45F8C4332F for ; Tue, 12 Apr 2022 03:31:26 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1344490AbiDLDdk (ORCPT ); Mon, 11 Apr 2022 23:33:40 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50652 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1344366AbiDLDdi (ORCPT ); Mon, 11 Apr 2022 23:33:38 -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 522F22DD4F for ; Mon, 11 Apr 2022 20:31:22 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1649734281; 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=5eb+Gzab3jr62PJIS60DbGOqSCN3+xOrWtJx9HNjsDg=; b=GrkO3HTXlBfv31E1hy6Jz2jIRBtCIMrbECa6kWo8jumygO73OHh5bY+UCp9+10VKWHvStz MRnRWHx898TEQ60BG47RLOhDZBVY0//rho66+MiZw5h567u+Kyl1DWBr84zBT61AvCk7mr mExszei55N1Y0ZxduUnXV0jIRIzUHmQ= Received: from mail-pl1-f198.google.com (mail-pl1-f198.google.com [209.85.214.198]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-294-9CupyfzIPVenyZFR3UezYA-1; Mon, 11 Apr 2022 23:31:20 -0400 X-MC-Unique: 9CupyfzIPVenyZFR3UezYA-1 Received: by mail-pl1-f198.google.com with SMTP id c11-20020a170902d48b00b001586f9a1076so1800957plg.20 for ; Mon, 11 Apr 2022 20:31:19 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:message-id:date:mime-version:user-agent:subject :content-language:to:cc:references:from:in-reply-to :content-transfer-encoding; bh=5eb+Gzab3jr62PJIS60DbGOqSCN3+xOrWtJx9HNjsDg=; b=1AMgmi0mklaFhF0kHAQaiqDHYXxTsKrwxyo06pj8Cxk03V8KpL7tZ/PrzB0OqOHSPc 7o6BovzPIhEx1yWAhTWBgB7OVl2Q2RrNK2EKynvnwrMU1LVdFLI1Erw6ueg+aFAfAwJM W6l8VL++DNv65KRNqFV3Pc9LbNfs7oypWEYEGwspyMm7OKCT1/eHeI4V2qNzid3I0Udc gBnFa0vdvTtqxoSHK7U9GdeV+zUrg/P+ek1mRa5vt0JO68Fzi89SWv0K+QHkpx3QDPg7 Px++2377x5Z5pO1cQo63smNx8bTBB6K+ibQE+zDZJXvHsG6Vu+3t2FhfldTm5CPrwMyR CjSg== X-Gm-Message-State: AOAM531vjHtPp9VMgwBLhGnako3Q3tAElAxAgSyRfkArV4nSXPSwlw0G pXbuxcME7M8MRoDVgU6XHLtnuAeMQzU7Ld1WP91m8d+178a0g9XsTPCRyIoHEVA5P2TgmPWTQjN ubeFPUY0Dh/V/ X-Received: by 2002:a63:3fc7:0:b0:398:aad3:3ce1 with SMTP id m190-20020a633fc7000000b00398aad33ce1mr28475478pga.461.1649734279081; Mon, 11 Apr 2022 20:31:19 -0700 (PDT) X-Google-Smtp-Source: ABdhPJz47KljxbHDCRWoq3Z8n63z/qIZIEy7qpHO2PYfQHRukhkqpY0pZKdUv2yQALElEze5aAFBww== X-Received: by 2002:a63:3fc7:0:b0:398:aad3:3ce1 with SMTP id m190-20020a633fc7000000b00398aad33ce1mr28475463pga.461.1649734278851; Mon, 11 Apr 2022 20:31:18 -0700 (PDT) Received: from [10.72.14.5] ([209.132.188.80]) by smtp.gmail.com with ESMTPSA id n4-20020a637204000000b00398522203a2sm1029161pgc.80.2022.04.11.20.31.09 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 11 Apr 2022 20:31:18 -0700 (PDT) Message-ID: <28237db0-cf04-aa36-b7b8-de55b11d18db@redhat.com> Date: Tue, 12 Apr 2022 11:31:08 +0800 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:91.0) Gecko/20100101 Thunderbird/91.7.0 Subject: Re: [PATCH v9 08/32] virtio_ring: split: extract the logic of attach vring Content-Language: en-US To: Xuan Zhuo , virtualization@lists.linux-foundation.org Cc: Jeff Dike , Richard Weinberger , Anton Ivanov , "Michael S. Tsirkin" , "David S. Miller" , Jakub Kicinski , Hans de Goede , Mark Gross , Vadim Pasternak , Bjorn Andersson , Mathieu Poirier , Cornelia Huck , Halil Pasic , Heiko Carstens , Vasily Gorbik , Christian Borntraeger , Alexander Gordeev , Sven Schnelle , Alexei Starovoitov , Daniel Borkmann , Jesper Dangaard Brouer , John Fastabend , Johannes Berg , Vincent Whitchurch , linux-um@lists.infradead.org, netdev@vger.kernel.org, platform-driver-x86@vger.kernel.org, linux-remoteproc@vger.kernel.org, linux-s390@vger.kernel.org, kvm@vger.kernel.org, bpf@vger.kernel.org References: <20220406034346.74409-1-xuanzhuo@linux.alibaba.com> <20220406034346.74409-9-xuanzhuo@linux.alibaba.com> From: Jason Wang In-Reply-To: <20220406034346.74409-9-xuanzhuo@linux.alibaba.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: bpf@vger.kernel.org 在 2022/4/6 上午11:43, Xuan Zhuo 写道: > Separate the logic of attach vring, subsequent patches will call it > separately. > > Signed-off-by: Xuan Zhuo > --- > drivers/virtio/virtio_ring.c | 20 ++++++++++++++------ > 1 file changed, 14 insertions(+), 6 deletions(-) > > diff --git a/drivers/virtio/virtio_ring.c b/drivers/virtio/virtio_ring.c > index 6de67439cb57..083f2992ba0d 100644 > --- a/drivers/virtio/virtio_ring.c > +++ b/drivers/virtio/virtio_ring.c > @@ -916,6 +916,19 @@ static void *virtqueue_detach_unused_buf_split(struct virtqueue *_vq) > return NULL; > } > > +static void vring_virtqueue_attach_split(struct vring_virtqueue *vq, > + struct vring vring, > + struct vring_desc_state_split *desc_state, > + struct vring_desc_extra *desc_extra) > +{ > + vq->split.vring = vring; > + vq->split.queue_dma_addr = 0; > + vq->split.queue_size_in_bytes = 0; Any reason to add the above two assignment in attach? It seems belong to free or reset. Thanks > + > + vq->split.desc_state = desc_state; > + vq->split.desc_extra = desc_extra; > +} > + > static int vring_alloc_state_extra_split(u32 num, > struct vring_desc_state_split **desc_state, > struct vring_desc_extra **desc_extra) > @@ -2262,10 +2275,6 @@ struct virtqueue *__vring_new_virtqueue(unsigned int index, > if (virtio_has_feature(vdev, VIRTIO_F_ORDER_PLATFORM)) > vq->weak_barriers = false; > > - vq->split.queue_dma_addr = 0; > - vq->split.queue_size_in_bytes = 0; > - > - vq->split.vring = vring; > vq->split.avail_flags_shadow = 0; > vq->split.avail_idx_shadow = 0; > > @@ -2283,8 +2292,7 @@ struct virtqueue *__vring_new_virtqueue(unsigned int index, > return NULL; > } > > - vq->split.desc_state = state; > - vq->split.desc_extra = extra; > + vring_virtqueue_attach_split(vq, vring, state, extra); > > /* Put everything in free lists. */ > vq->free_head = 0;