Re: [PATCH v8 10/13] iommu/amd: Allocate memory below 4G for dev table if translation pre-enabled

[Joerg Roedel]

On Fri, Jul 28, 2017 at 05:06:19PM +0800, Baoquan He wrote:
> Do you mean the allocation of amd_iommu_dev_table in
> early_amd_iommu_init() also need be addressed for 1st kernel? Seems we
> don't make sure that for 1st kernel, like adding GFP_DMA32 flag when
> allocate amd_iommu_dev_table in amd_iommu_dev_table
> early_amd_iommu_init().

Yes, exactly, the first device table also needs to be allocated with
GFP_DMA32 so that it ends up below 4GB.