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.
