Re: [RFC PATCH v1 00/18] Provide a new two step DMA API mapping API

Leon Romanovsky
2024-07-03T10:52:58Z

On Wed, Jul 03, 2024 at 07:42:38AM +0200, Christoph Hellwig wrote:
> I just tried to boot this on my usual qemu test setup with emulated
> nvme devices, and it dead-loops with messages like this fairly late
> in the boot cycle:
>
> [ 43.826627] iommu: unaligned: iova 0xfff7e000 pa 0x000000010be33650 size 0x1000 min_pagesz 0x1000
> [ 43.826982] dma_mapping_error -12
>
> passing intel_iommu=off instead of intel_iommu=on (expectedly) makes
> it go away.

Can you please share your kernel command line and qemu?
On my and Chaitanya setups it works fine.

Thanks