[dpdk-dev] [PATCH v2 2/5] net/virtio: add interrupt configure for vdev

Yuanhan Liu yuanhan.liu at linux.intel.com
Wed Mar 29 09:09:06 CEST 2017

On Wed, Mar 29, 2017 at 03:03:16PM +0800, Tan, Jianfeng wrote:
> On 3/29/2017 2:27 PM, Yuanhan Liu wrote:
> >On Tue, Mar 28, 2017 at 08:21:53AM +0000, Jianfeng Tan wrote:
> >>For virtio PCI devices, interrupt should be configured before setting
> >>VIRTIO_CONFIG_STATUS_DRIVER_OK so that QEMU can properly set eventfds
> >>in the host.
> >>
> >>For virtio virtual devices, VIRTIO_CONFIG_STATUS_DRIVER_OK should be
> >>set firstly, so that intr_handle is initialized in
> >>virtio_user_start_device().
> >I'm wondering why can't you let virtio-user follow virtio-pci?
> It's because that virtio-user not only counts on virtio_user_start_device()
> to allocate intr_handle, it also needs the information in this function to
> initialize this struct. For virtio-pci, similar information is from
> rte_intr_enable/rte_intr_efd_enable.
> Or do you mean we can move calling virtio_user_start_device() ahead? I can
> hardly find other place instead of DRIVER_OK.

For example, virtio_user_dev_init()?


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