Hello,
I am using DPDK 1.5 for development of host pmd for device “Connect X3”.
I am observing issue while the ConnectX3 device DMA to a memory which is allocated with rte_memzone_reserve_aligned() API .
The issue(please refer ERROR below) has been observed if the system runs with the kernel parameter “intel_iommu=on”.
########## ERROR :##################################3
dmar: DRHD: handling fault status reg 302
dmar: DMAR:[DMA Write] Request device [01:00.0] fault addr 4f883000
DMAR:[fault reason 01] Present bit in root entry is clear
####################################
The reported "fault Addr" is the physical address which was returned by the Above API.
I don’t see any issue with the same code when the system up with kernel parameter intel_iommu=off.
If I use kernel parameters intel_iommu=on and iommu=pt, then the following error has been observed.
####ERROR REPORT########
dmar: DRHD: handling fault status reg 2
dmar: DMAR:[DMA Write] Request device [01:00.0] fault addr 4f883000 DMAR:[fault reason 02] Present bit in context entry is clear ##########################
Can you let me know what could be missing in my platform configuration?
