Re: [dpdk-dev] [PATCH v2] net/virtio: fix rxq intr config fails using vfio-pci

["Yang, Zhiyong" <zhiyong.yang@intel.com>]

Hi Jianfeng,

Thanks for detailed reviews and comments. Next version will come soon according to your suggestions.

Thanks
Zhiyong

> -----Original Message-----
> From: Tan, Jianfeng
> Sent: Wednesday, November 8, 2017 9:53 PM
> To: Yang, Zhiyong <zhiyong.yang@intel.com>; dev@dpdk.org
> Cc: yliu@fridaylinux.org; maxime.coquelin@redhat.com
> Subject: Re: [PATCH v2] net/virtio: fix rxq intr config fails using vfio-pci
> 
> 
> Hi Zhiyong,
> 
> 
> On 11/8/2017 7:03 PM, Zhiyong Yang wrote:
> > When running l3fwd-power to test virtio rxq interrupt using vfio pci
> > noiommu mode, startup fails. In the function virtio_read_caps, the
> > code if (flags & PCI_MSIX_ENABLE) intends to double check if vfio msix
> > is enabled or not. However, it is not enable at that stage. So
> > use_msix is assigned to "0", not "1", which causes the failure of
> > configuring rxq intr in l3fwd-power.
> > This patch adds the function vtpci_msix_detect to detect the status of
> > msix when interrupt changes happen.
> > In the meanwhile, virtio_intr_enable/disable are introduced to wrap
> > rte_intr_enable/disable to enhance the ability to detect msix. Only
> > support and enable msix can assign "1" to use_msix.
> 
> Should be "2". Better to use macro here.
> 
> >
> > Fixes: cb482cb3a305 ("net/virtio: fix MAC address read")
> > Signed-off-by: Zhiyong Yang <zhiyong.yang@intel.com>
> > ---