From: "Tan, Jianfeng" <jianfeng.tan@intel.com>
To: Yuanhan Liu <yuanhan.liu@linux.intel.com>
Cc: dev@dpdk.org, ferruh.yigit@intel.com, cunming.liang@intel.com
Subject: Re: [dpdk-dev] [PATCH v2 5/7] net/virtio_user: add vhost kernel support
Date: Wed, 4 Jan 2017 15:22:08 +0800 [thread overview]
Message-ID: <59e32f20-fe7a-20ad-1aa6-99fc90322a42@intel.com> (raw)
In-Reply-To: <20161226074437.GD19288@yliu-dev.sh.intel.com>
Sorry, I forget to reply this comment.
On 12/26/2016 3:44 PM, Yuanhan Liu wrote:
> [...]
>> +
>> + /* Does not work when VIRTIO_F_IOMMU_PLATFORM now, why? */
> Because this feature need the vhost IOTLB support from the device
> emulation. Patches for QEMU hasn't been merged yet, but it has been
> there for a while.
Yes. And it's in need of help from QEMU.
>
> Since we don't have the support yet, for sure it won't work. But
> I'm wondering why you have to disable it explicitly?
Here we do not have QEMU. Frontend driver talks with vhost-net through
virtio_user_dev. And both ends claim to support VIRTIO_F_IOMMU_PLATFORM.
So this feature bit will be negotiated if we don't explicitly disable
it. In my previous test, it fails in vhost_init_device_iotlb() of vhost
kernel module. My guess is that, for this feature, without the help of
QEMU, vhost kernel module cannot work independently.
Thanks,
Jianfeng
next prev parent reply other threads:[~2017-01-04 7:22 UTC|newest]
Thread overview: 72+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-12-02 14:31 [dpdk-dev] [PATCH 0/3] virtio_user as an alternative exception path Jianfeng Tan
2016-12-02 14:31 ` [dpdk-dev] [PATCH 1/3] net/virtio_user: add vhost layer Jianfeng Tan
2016-12-08 7:21 ` Yuanhan Liu
2016-12-02 14:31 ` [dpdk-dev] [PATCH 2/3] net/virtio_user: add vhost kernel support Jianfeng Tan
2016-12-02 14:31 ` [dpdk-dev] [PATCH 3/3] net/virtio_user: fix wrongly set features Jianfeng Tan
2016-12-08 8:32 ` Yuanhan Liu
2016-12-02 14:44 ` [dpdk-dev] [PATCH 0/3] virtio_user as an alternative exception path Thomas Monjalon
2016-12-23 7:14 ` [dpdk-dev] [PATCH v2 0/7] " Jianfeng Tan
2016-12-23 7:14 ` [dpdk-dev] [PATCH v2 1/7] net/virtio_user: fix wrongly set features Jianfeng Tan
2016-12-23 7:14 ` [dpdk-dev] [PATCH v2 2/7] net/virtio_user: postpone DRIVER OK notification Jianfeng Tan
[not found] ` <20161226062719.GA19288@yliu-dev.sh.intel.com>
2016-12-26 6:55 ` Tan, Jianfeng
2016-12-26 8:02 ` Yuanhan Liu
2016-12-26 8:26 ` Tan, Jianfeng
2016-12-23 7:14 ` [dpdk-dev] [PATCH v2 3/7] net/virtio_user: move vhost user specific code Jianfeng Tan
2016-12-26 6:28 ` Yuanhan Liu
2016-12-26 6:58 ` Tan, Jianfeng
2016-12-26 7:57 ` Yuanhan Liu
2016-12-29 9:40 ` Tan, Jianfeng
2016-12-23 7:14 ` [dpdk-dev] [PATCH v2 4/7] net/virtio_user: abstract virtio user backend ops Jianfeng Tan
2016-12-26 6:41 ` Yuanhan Liu
2016-12-23 7:14 ` [dpdk-dev] [PATCH v2 5/7] net/virtio_user: add vhost kernel support Jianfeng Tan
2016-12-26 7:44 ` Yuanhan Liu
2017-01-04 7:22 ` Tan, Jianfeng [this message]
2017-01-04 7:46 ` Yuanhan Liu
2017-01-09 4:51 ` Jason Wang
2017-01-09 4:39 ` Jason Wang
2017-01-10 6:11 ` Tan, Jianfeng
2017-01-10 8:46 ` Thomas Monjalon
2017-01-10 9:11 ` Tan, Jianfeng
2017-01-11 2:42 ` Jason Wang
2017-01-11 3:13 ` Tan, Jianfeng
2017-01-11 3:23 ` Jason Wang
2017-01-12 9:40 ` Tan, Jianfeng
2017-01-13 2:27 ` Jason Wang
2017-01-11 2:30 ` Tan, Jianfeng
2017-01-11 2:45 ` Jason Wang
2016-12-23 7:14 ` [dpdk-dev] [PATCH v2 6/7] net/virtio_user: enable offloading Jianfeng Tan
2016-12-26 7:53 ` Yuanhan Liu
2016-12-23 7:14 ` [dpdk-dev] [PATCH v2 7/7] net/virtio_user: enable multiqueue with vhost kernel Jianfeng Tan
2017-01-04 3:59 ` [dpdk-dev] [PATCH v3 0/7] virtio_user as an alternative exception path Jianfeng Tan
2017-01-04 3:59 ` [dpdk-dev] [PATCH v3 1/7] net/virtio_user: fix wrongly set features Jianfeng Tan
2017-01-04 3:59 ` [dpdk-dev] [PATCH v3 2/7] net/virtio_user: fix not properly reset device Jianfeng Tan
2017-01-04 5:46 ` Yuanhan Liu
2017-01-04 3:59 ` [dpdk-dev] [PATCH v3 3/7] net/virtio_user: move vhost user specific code Jianfeng Tan
2017-01-04 6:02 ` Yuanhan Liu
2017-01-04 6:46 ` Tan, Jianfeng
2017-01-04 7:08 ` Yuanhan Liu
2017-01-04 3:59 ` [dpdk-dev] [PATCH v3 4/7] net/virtio_user: abstract virtio user backend ops Jianfeng Tan
2017-01-04 6:11 ` Yuanhan Liu
2017-01-04 3:59 ` [dpdk-dev] [PATCH v3 5/7] net/virtio_user: add vhost kernel support Jianfeng Tan
2017-01-04 6:13 ` Yuanhan Liu
2017-01-04 3:59 ` [dpdk-dev] [PATCH v3 6/7] net/virtio_user: enable offloading Jianfeng Tan
2017-01-04 3:59 ` [dpdk-dev] [PATCH v3 7/7] net/virtio_user: enable multiqueue with vhost kernel Jianfeng Tan
2017-01-09 14:06 ` [dpdk-dev] [PATCH v3 0/7] virtio_user as an alternative exception path Bruce Richardson
2017-01-10 8:46 ` Tan, Jianfeng
2017-01-13 12:18 ` [dpdk-dev] [PATCH v4 0/8] " Jianfeng Tan
2017-01-13 12:18 ` [dpdk-dev] [PATCH v4 1/8] net/virtio_user: fix wrongly get/set features Jianfeng Tan
2017-01-13 12:18 ` [dpdk-dev] [PATCH v4 2/8] net/virtio_user: fix not properly reset device Jianfeng Tan
2017-01-13 12:18 ` [dpdk-dev] [PATCH v4 3/8] net/virtio_user: move vhost user specific code Jianfeng Tan
2017-01-13 12:18 ` [dpdk-dev] [PATCH v4 4/8] net/virtio_user: abstract virtio user backend ops Jianfeng Tan
2017-01-13 12:18 ` [dpdk-dev] [PATCH v4 5/8] net/virtio_user: add vhost kernel support Jianfeng Tan
2017-01-13 12:18 ` [dpdk-dev] [PATCH v4 6/8] net/virtio_user: enable offloading Jianfeng Tan
2017-01-13 12:18 ` [dpdk-dev] [PATCH v4 7/8] net/virtio_user: enable multiqueue with vhost kernel Jianfeng Tan
2017-01-13 12:18 ` [dpdk-dev] [PATCH v4 8/8] doc: add guide to use virtio_user as exceptional path Jianfeng Tan
2017-01-16 6:00 ` Yuanhan Liu
2017-01-16 6:04 ` Yuanhan Liu
2017-01-16 9:44 ` Thomas Monjalon
2017-01-16 9:49 ` Yuanhan Liu
2017-01-16 14:45 ` Thomas Monjalon
2017-01-22 0:46 ` Aws Ismail
2017-01-22 7:16 ` Tan, Jianfeng
2017-01-16 15:05 ` [dpdk-dev] [PATCH v4 0/8] virtio_user as an alternative exception path Yuanhan Liu
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