[dpdk-dev] Issue with VFIO/IOMMU
Burakov, Anatoly
anatoly.burakov at intel.com
Fri Sep 4 15:50:10 CEST 2020
On 03-Sep-20 12:09 PM, Vikas Gupta wrote:
> Hi,
>
> I observe an issue with IOVA address returned by api
> rte_memzone_reserve_aligned (flags= RTE_MEMZONE_IOVA_CONTIG) used for queue
> memory allocation. With high level debugging, I notice that IOVA address
> returned in mz->iova is not mapped by VFIO_IOMMU_MAP_DMA so in turn SMMU
> exception is seen.
I'm not sure i follow.
How did you determine that to be the case, given that, by your own
admission below, `vfio_type1_dma_mem_map` function is executed several
times?
>
>
>
> *Details for the setup*
>
> Platform: Armv8 (Broadcom Stingray)
>
> DPDK release: DPDK 20.08 <http://fast.dpdk.org/rel/dpdk-20.08.tar.xz>
>
> PMD patch:
>
> https://patches.dpdk.org/project/dpdk/list/?series=&submitter=1907&state=&q=&archive=&delegate=
>
> dpdk-test is launched using below command
>
> *dpdk-test --vdev <cryptopmd_name> -w 0000:00:00.0 --iova-mode pa *
>
>
>
> The test suite is launched over dpdk-test application command prompt using
> command ‘cryptodev_<cryptopmd_name>_autotest’
>
> The issue is seen when several iterations of above test_suite is executed
> which in turn do multiple calls to rte_memzone_reserve_aligned,
> rte_mempool_create and rte_memzone_free, rte_mempool_free.
>
> Function *vfio_type1_dma_mem_map* with map/unmap event is executed several
> times during test_suite run.
>
>
>
> Any inputs would be helpful.
>
>
>
> Thanks,
>
> Vikas
>
--
Thanks,
Anatoly
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