Hi Joerg,

On 6/23/2022 1:42 PM, Joerg Roedel wrote:
> On Fri, Jun 03, 2022 at 04:51:07PM +0530, Vasant Hegde wrote:
>> +    amd_iommu_pgtable= [HW,X86-64]
>> +                    Specifies one of the following AMD IOMMU page table to
>> +                    be used for DMA remapping for DMA-API:
>> +                    v1         - Use v1 page table (Default)
>> +                    v2         - Use v2 page table
>> +
> 
> Can we handle this somehow in the amd_iommu= option? Something like
> amd_iommu=pgtbl_v2|pgtbl_v1?
> 

I think it will complicate the parsing logic. We do have `amd_iommu=off` option.
How are we going to handle `amd_iommu=off,[pgtable_v1/v2]` ? 

-Vasant
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