SONiC DMAR: [DMA Read NO_PASID] issue on Arista hardware

[Dariusz Mazur]

Hello SONiC community,

I installed SONiC on arista_7060dx4_32:
dmazur@xxxxx:~$ show version
SONiC Software Version: SONiC.202511.1122158-031d1cd48
SONiC OS Version: 13
Distribution: Debian 13.4
Kernel: 6.12.41+deb13-sonic-amd64
Build commit: 031d1cd48
Build date: Mon May 25 14:49:39 UTC 2026
Built by: azureuser@170ff10bc000001

Platform: x86_64-arista_7060dx4_32
HwSKU: Arista-7060DX4-C32
ASIC: broadcom
ASIC Count: 1
Serial Number: JPA22241192
Model Number: DCS-7060DX4-32
Hardware Revision: 04.00

After installation I see below error:
[Wed Jun  3 09:02:50 2026] DMAR: [DMA Read NO_PASID] Request device [06:00.0] fault addr 0x20000000 [fault reason 0x06] PTE Read access is not set
[Wed Jun  3 09:03:00 2026] DMAR: DRHD: handling fault status reg 102
[Wed Jun  3 09:03:00 2026] DMAR: [DMA Read NO_PASID] Request device [06:00.0] fault addr 0x20000000 [fault reason 0x06] PTE Read access is not set
[Wed Jun  3 09:03:11 2026] DMAR: DRHD: handling fault status reg 202
[Wed Jun  3 09:03:11 2026] DMAR: [DMA Read NO_PASID] Request device [06:00.0] fault addr 0x20000000 [fault reason 0x06] PTE Read access is not set
[Wed Jun  3 09:03:21 2026] DMAR: DRHD: handling fault status reg 302
[Wed Jun  3 09:03:21 2026] DMAR: [DMA Read NO_PASID] Request device [06:00.0] fault addr 0x20000000 [fault reason 0x06] PTE Read access is not set

dmazur@xxxxxxx:~$ lspci -s 06:00.0 -nnvv
06:00.0 Ethernet controller [0200]: Broadcom Inc. and subsidiaries Device [14e4:b980] (rev 11)
Subsystem: Broadcom Inc. and subsidiaries Device [14e4:b980]
Physical Slot: 0
Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort+ >SERR- <PERR- INTx-
Latency: 0
Interrupt: pin A routed to IRQ 16
IOMMU group: 32
Region 0: Memory at 380000800000 (64-bit, prefetchable) [size=32K]
Region 2: Memory at 380000000000 (64-bit, prefetchable) [size=8M]
Capabilities: <access denied>
Kernel driver in use: linux-kernel-bde
Kernel modules: linux_kernel_bde


I am not sure if it is a hardware issue. Arista was working well with EOS. Did you face this? Do you have any suggestion how severe this error is. Can you suggest any fix?

Thanks,
Darek