Error on dmesg and IOMMU not found on log message

[andoniaina]

Hi guys,

Actually I'm trying to follow the passthrough tutorial to use directly my graphic card on Windows VM under proxmox.

When I try this command dmesg | grep -e DMAR -e IOMMU, but nothing appear. In the dmesg log I've a lot of error and want to fix then first.

[66532.882862] DMAR: [DMA Write] Request device [03:00.2] PASID ffffffff fault addr bdf7f000 [fault reason 02] Present bit in context entry is clear
[66537.893803] DMAR: DRHD: handling fault status reg 302
[66537.897655] DMAR: [DMA Write] Request device [03:00.2] PASID ffffffff fault addr bdf7f000 [fault reason 02] Present bit in context entry is clear
[66542.908511] DMAR: DRHD: handling fault status reg 402
[66542.912385] DMAR: [DMA Write] Request device [03:00.2] PASID ffffffff fault addr bdf7f000 [fault reason 02] Present bit in context entry is clear
[66547.924805] DMAR: DRHD: handling fault status reg 502
[66547.928674] DMAR: [DMA Write] Request device [03:00.2] PASID ffffffff fault addr bdf7f000 [fault reason 02] Present bit in context entry is clear
[66552.939564] DMAR: DRHD: handling fault status reg 602
[66552.943682] DMAR: [DMA Write] Request device [03:00.2] PASID ffffffff fault addr bdf7f000 [fault reason 02] Present bit in context entry is clear
[66557.954268] DMAR: DRHD: handling fault status reg 702
[66557.958306] DMAR: [DMA Write] Request device [03:00.2] PASID ffffffff fault addr bdf7f000 [fault reason 02] Present bit in context entry is clear
[66562.969021] DMAR: DRHD: handling fault status reg 2
[66562.972888] DMAR: [DMA Write] Request device [03:00.2] PASID ffffffff fault addr bdf7f000 [fault reason 02] Present bit in context entry is clear

Can You help Guys, I don't know where the error is coming.

BR

 

[andoniaina]

One details that I miss to say is on the message log and not on syslog I see that the DMAR: IOMMU is correctly enabled.