Issue with PASID on some platforms

Hi,

I'm trying to run the micro, and on some machines it works, on some the DSA halts with a weird PASID-relate error in `dmesg`. All the machines I'm using are identical SPR servers (but slightly different CPU versions) with identical Linux Kernels and BIOS configurations.

`
[ 232.023841] idxd 0000:6a:01.0: idxd halted, need FLR.
[ 232.023907] DMAR: DRHD: handling fault status reg 3
[ 232.023974] DMAR: [DMA Read PASID 0x2] Request device [6a:01.0] fault addr 0x7fe0c9943000 [fault reason 0x3a] SM: Non-zero reserved field set in Root Entry
`

I'm using the following sequence of actions to reproduce it:

`sudo ./scripts/setup_dsa.sh -d dsa0 -w 1 -m d -e 4`
`sudo ./src/dsa_perf_micros -n128 -s4k -j -c -f -i1000 -k5 -w0 -zF,F -o3`.

Have you seen this error on any machine before? If so, what can it be related to?

I'm using Linux Kernel 5.15, patched with `enqcmd` and using the same kernel on all the machines.