From patchwork Wed Sep 26 07:27:05 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Maxime Coquelin X-Patchwork-Id: 45365 X-Patchwork-Delegate: maxime.coquelin@redhat.com Return-Path: X-Original-To: patchwork@dpdk.org Delivered-To: patchwork@dpdk.org Received: from [92.243.14.124] (localhost [127.0.0.1]) by dpdk.org (Postfix) with ESMTP id 00E5C1B161; Wed, 26 Sep 2018 09:28:02 +0200 (CEST) Received: from mx1.redhat.com (mx1.redhat.com [209.132.183.28]) by dpdk.org (Postfix) with ESMTP id 2B89C1B13E for ; Wed, 26 Sep 2018 09:28:01 +0200 (CEST) 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 mx1.redhat.com (Postfix) with ESMTPS id 8FC783082A51; Wed, 26 Sep 2018 07:28:00 +0000 (UTC) Received: from localhost.localdomain (ovpn-112-32.ams2.redhat.com [10.36.112.32]) by smtp.corp.redhat.com (Postfix) with ESMTP id CEEE960BE1; Wed, 26 Sep 2018 07:27:58 +0000 (UTC) From: Maxime Coquelin To: dev@dpdk.org, tiwei.bie@intel.com, zhihong.wang@intel.com, jfreimann@redhat.com Cc: dgilbert@redhat.com, Maxime Coquelin Date: Wed, 26 Sep 2018 09:27:05 +0200 Message-Id: <20180926072705.22641-13-maxime.coquelin@redhat.com> In-Reply-To: <20180926072705.22641-1-maxime.coquelin@redhat.com> References: <20180926072705.22641-1-maxime.coquelin@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.45]); Wed, 26 Sep 2018 07:28:00 +0000 (UTC) Subject: [dpdk-dev] [PATCH 12/12] net/vhost: add parameter to enable postcopy migration support X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org Sender: "dev" Introduce a new postcopy-support parameter to Vhost PMD that passes the RTE_VHOST_USER_POSTCOPY_SUPPORT flag at vhost device register time. Flag should only be set if application does not prefault guest memory using, for example, mlockall() syscall. Default value is 0, meaning that postcopy support is disabled unless specified explicitly. Example to enable postcopy support for a given device: --vdev 'net_vhost0,iface=/tmp/vhost-user1,postcopy-support=1' Signed-off-by: Maxime Coquelin --- doc/guides/nics/vhost.rst | 5 +++++ drivers/net/vhost/rte_eth_vhost.c | 13 +++++++++++++ 2 files changed, 18 insertions(+) diff --git a/doc/guides/nics/vhost.rst b/doc/guides/nics/vhost.rst index 4f7ae8990..23f2e87aa 100644 --- a/doc/guides/nics/vhost.rst +++ b/doc/guides/nics/vhost.rst @@ -71,6 +71,11 @@ The user can specify below arguments in `--vdev` option. It is used to enable iommu support in vhost library. (Default: 0 (disabled)) +#. ``postcopy-support``: + + It is used to enable postcopy live-migration support in vhost library. + (Default: 0 (disabled)) + Vhost PMD event handling ------------------------ diff --git a/drivers/net/vhost/rte_eth_vhost.c b/drivers/net/vhost/rte_eth_vhost.c index aa6052221..1330f06ba 100644 --- a/drivers/net/vhost/rte_eth_vhost.c +++ b/drivers/net/vhost/rte_eth_vhost.c @@ -30,6 +30,7 @@ enum {VIRTIO_RXQ, VIRTIO_TXQ, VIRTIO_QNUM}; #define ETH_VHOST_CLIENT_ARG "client" #define ETH_VHOST_DEQUEUE_ZERO_COPY "dequeue-zero-copy" #define ETH_VHOST_IOMMU_SUPPORT "iommu-support" +#define ETH_VHOST_POSTCOPY_SUPPORT "postcopy-support" #define VHOST_MAX_PKT_BURST 32 static const char *valid_arguments[] = { @@ -38,6 +39,7 @@ static const char *valid_arguments[] = { ETH_VHOST_CLIENT_ARG, ETH_VHOST_DEQUEUE_ZERO_COPY, ETH_VHOST_IOMMU_SUPPORT, + ETH_VHOST_POSTCOPY_SUPPORT, NULL }; @@ -1339,6 +1341,7 @@ rte_pmd_vhost_probe(struct rte_vdev_device *dev) int client_mode = 0; int dequeue_zero_copy = 0; int iommu_support = 0; + int postcopy_support = 0; struct rte_eth_dev *eth_dev; const char *name = rte_vdev_device_name(dev); @@ -1411,6 +1414,16 @@ rte_pmd_vhost_probe(struct rte_vdev_device *dev) flags |= RTE_VHOST_USER_IOMMU_SUPPORT; } + if (rte_kvargs_count(kvlist, ETH_VHOST_POSTCOPY_SUPPORT) == 1) { + ret = rte_kvargs_process(kvlist, ETH_VHOST_POSTCOPY_SUPPORT, + &open_int, &postcopy_support); + if (ret < 0) + goto out_free; + + if (postcopy_support) + flags |= RTE_VHOST_USER_POSTCOPY_SUPPORT; + } + if (dev->device.numa_node == SOCKET_ID_ANY) dev->device.numa_node = rte_socket_id();