Message ID | 20220624025621.128843-24-xuanzhuo@linux.alibaba.com |
---|---|
State | Not Applicable |
Headers | show
Return-Path: <linux-um-bounces+incoming=patchwork.ozlabs.org@lists.infradead.org> X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: bilbo.ozlabs.org; dkim=pass (2048-bit key; secure) header.d=lists.infradead.org header.i=@lists.infradead.org header.a=rsa-sha256 header.s=bombadil.20210309 header.b=JGno0hih; dkim-atps=neutral Authentication-Results: ozlabs.org; spf=none (no SPF record) smtp.mailfrom=lists.infradead.org (client-ip=2607:7c80:54:3::133; helo=bombadil.infradead.org; envelope-from=linux-um-bounces+incoming=patchwork.ozlabs.org@lists.infradead.org; receiver=<UNKNOWN>) Received: from bombadil.infradead.org (bombadil.infradead.org [IPv6:2607:7c80:54:3::133]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by bilbo.ozlabs.org (Postfix) with ESMTPS id 4LThcW0dfVz9sFk for <incoming@patchwork.ozlabs.org>; Fri, 24 Jun 2022 12:57:31 +1000 (AEST) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=jz6MlDVYexLqkiq/D2pyTlcTqnaHpuiNjdYc5GcQgIA=; b=JGno0hihIubxHa hIZEoV2RMBsIaQ4Ic2uh9pymrvbRb65rQej6QlxrlLNVYbkL0pvLI1v1444GVCPOmQ7ICc03yy9iR BmO+2oYBafKaPLSHm0Nvn/KkauHnPP/w4QpnOg+GSjPmgq4bj5F95pEXyr/PDFq0jf5zc+z4d3q/0 kjf3Cy8cF9SAAg4y1PpNZgDONeo58wOViPtsQZjBDUf8cpLQeFdH6TJcNSTjd/iZ10Q1dOuQRVVSn fq2IAhA+gXtUKAFtnXfxejXCF+aotJExQGHYSnbYG2lUu6gL9bCD83G4KrMs0TTnnN/D2YDoKgs8f MHdQhN8uNBLGbvatIfPQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1o4ZVc-00HVYn-3x; Fri, 24 Jun 2022 02:57:24 +0000 Received: from out30-45.freemail.mail.aliyun.com ([115.124.30.45]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1o4ZVX-00HVTv-Qr for linux-um@lists.infradead.org; Fri, 24 Jun 2022 02:57:21 +0000 X-Alimail-AntiSpam: AC=PASS;BC=-1|-1;BR=01201311R131e4;CH=green;DM=||false|;DS=||;FP=0|-1|-1|-1|0|-1|-1|-1;HT=ay29a033018046051;MF=xuanzhuo@linux.alibaba.com;NM=1;PH=DS;RN=37;SR=0;TI=SMTPD_---0VHEuW2C_1656039433; Received: from localhost(mailfrom:xuanzhuo@linux.alibaba.com fp:SMTPD_---0VHEuW2C_1656039433) by smtp.aliyun-inc.com; Fri, 24 Jun 2022 10:57:14 +0800 From: Xuan Zhuo <xuanzhuo@linux.alibaba.com> To: virtualization@lists.linux-foundation.org Cc: Richard Weinberger <richard@nod.at>, Anton Ivanov <anton.ivanov@cambridgegreys.com>, Johannes Berg <johannes@sipsolutions.net>, "Michael S. 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Miller" <davem@davemloft.net>, Eric Dumazet <edumazet@google.com>, Jakub Kicinski <kuba@kernel.org>, Paolo Abeni <pabeni@redhat.com>, Hans de Goede <hdegoede@redhat.com>, Mark Gross <markgross@kernel.org>, Vadim Pasternak <vadimp@nvidia.com>, Bjorn Andersson <bjorn.andersson@linaro.org>, Mathieu Poirier <mathieu.poirier@linaro.org>, Cornelia Huck <cohuck@redhat.com>, Halil Pasic <pasic@linux.ibm.com>, Eric Farman <farman@linux.ibm.com>, Heiko Carstens <hca@linux.ibm.com>, Vasily Gorbik <gor@linux.ibm.com>, Alexander Gordeev <agordeev@linux.ibm.com>, Christian Borntraeger <borntraeger@linux.ibm.com>, Sven Schnelle <svens@linux.ibm.com>, Alexei Starovoitov <ast@kernel.org>, Daniel Borkmann <daniel@iogearbox.net>, Jesper Dangaard Brouer <hawk@kernel.org>, John Fastabend <john.fastabend@gmail.com>, Xuan Zhuo <xuanzhuo@linux.alibaba.com>, Vincent Whitchurch <vincent.whitchurch@axis.com>, 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, kangjie.xu@linux.alibaba.com Subject: [PATCH v10 23/41] virtio_ring: packed: introduce virtqueue_resize_packed() Date: Fri, 24 Jun 2022 10:56:03 +0800 Message-Id: <20220624025621.128843-24-xuanzhuo@linux.alibaba.com> X-Mailer: git-send-email 2.31.0 In-Reply-To: <20220624025621.128843-1-xuanzhuo@linux.alibaba.com> References: <20220624025621.128843-1-xuanzhuo@linux.alibaba.com> MIME-Version: 1.0 X-Git-Hash: fef800c86cd2 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220623_195720_070599_7EADC6D9 X-CRM114-Status: UNSURE ( 8.63 ) X-CRM114-Notice: Please train this message. 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Series |
virtio pci support VIRTIO_F_RING_RESET
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expand
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diff --git a/drivers/virtio/virtio_ring.c b/drivers/virtio/virtio_ring.c index 740b17550df5..d3b2139200fa 100644 --- a/drivers/virtio/virtio_ring.c +++ b/drivers/virtio/virtio_ring.c @@ -2016,6 +2016,35 @@ static struct virtqueue *vring_create_virtqueue_packed( return NULL; } +static int virtqueue_resize_packed(struct virtqueue *_vq, u32 num) +{ + struct vring_virtqueue_packed vring = {}; + struct vring_virtqueue *vq = to_vvq(_vq); + struct virtio_device *vdev = _vq->vdev; + int err; + + if (vring_alloc_queue_packed(&vring, vdev, num)) + goto err_ring; + + err = vring_alloc_state_extra_packed(&vring); + if (err) + goto err_state_extra; + + vring_free(&vq->vq); + + virtqueue_init(vq, vring.vring.num); + virtqueue_vring_attach_packed(vq, &vring); + virtqueue_vring_init_packed(vq); + + return 0; + +err_state_extra: + vring_free_packed(&vring, vdev); +err_ring: + virtqueue_reinit_packed(vq); + return -ENOMEM; +} + /* * Generic functions and exported symbols.
virtio ring packed supports resize. Only after the new vring is successfully allocated based on the new num, we will release the old vring. In any case, an error is returned, indicating that the vring still points to the old vring. In the case of an error, re-initialize(by virtqueue_reinit_packed()) the virtqueue to ensure that the vring can be used. Signed-off-by: Xuan Zhuo <xuanzhuo@linux.alibaba.com> --- drivers/virtio/virtio_ring.c | 29 +++++++++++++++++++++++++++++ 1 file changed, 29 insertions(+)