[dpdk-stable] [PATCH] net/ixgbe: fix Rx queue interrupt mapping in VF

Lu, Wenzhuo wenzhuo.lu at intel.com
Wed Oct 11 05:13:05 CEST 2017


> -----Original Message-----
> From: Dai, Wei
> Sent: Wednesday, September 20, 2017 6:18 PM
> To: Lu, Wenzhuo <wenzhuo.lu at intel.com>; Ananyev, Konstantin
> <konstantin.ananyev at intel.com>
> Cc: dev at dpdk.org; Dai, Wei <wei.dai at intel.com>; stable at dpdk.org
> Subject: [PATCH] net/ixgbe: fix Rx queue interrupt mapping in VF
> When a VF port is bound to VFIO-PCI, miscellaneous interrupt is mapped to
> MSI-X vector 0 and Rx queues interrupt are mapped to other vectors in
> vfio_enable_msix( ). To simplify implementation, all VFIO-PCI bound ixgbe VF
> Rx queue interrupts can be mapped in vector 1. And as current igb_uio only
> support only one vector, ixgbe VF PMD should use vector 0 for igb_uio and
> vector 1 for VFIO-PCI. Without this patch, VF Rx queue interrupt is mapped
> to vector 0 in register settings and mapped to VFIO vector 1 in
> vfio_enable_msix( ), and then all Rx queue interrupts will be missed.
> Fixes: b13bfab4cdbe ("eal: reserve VFIO vector zero for misc interrupt")
> Cc: stable at dpdk.org
> Signed-off-by: Wei Dai <wei.dai at intel.com>
Acked-by: Wenzhuo Lu <wenzhuo.lu at intel.com>

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