Hi Richard:
This issue should be related to the buggy BIOS ivrs table. Kernel panic when found no southbridge device ID.
Could you try boot kernel with "amd_iommu_dump=1 amd_iommu=off" (remove other kernel parameters you tried to solve this issue).
If it works, please attach the dmesg here. I will try to make a kernel patch to make kernel boot with irq map disabled instead of panic.
Hi Richard:
This issue should be related to the buggy BIOS ivrs table.
Kernel panic when found no southbridge device ID.
Could you try boot kernel with "amd_iommu_dump=1 amd_iommu=off" (remove other kernel parameters you tried to solve this issue).
If it works, please attach the dmesg here.
I will try to make a kernel patch to make kernel boot with irq map disabled instead of panic.