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.
Thanks,
Jianfeng
