On Tue, 13 Jun 2023 12:16:41 -0500, Gaurav Batra wrote:

When memory is dynamically added/removed, iommu_mem_notifier() is invoked. This
routine traverses through all the DMA windows (DDW only, not default windows)
to add/remove "direct" TCE mappings. The routines for this purpose are
tce_clearrange_multi_pSeriesLP() and tce_clearrange_multi_pSeriesLP().

Both these routines are designed for Direct mapped DMA windows only.

[...]

Applied to powerpc/next.

[1/1] powerpc/iommu: TCEs are incorrectly manipulated with DLPAR add/remove of memory
      https://git.kernel.org/powerpc/c/d61cd13e732c0eaa7d66b45edb2d0de8eab65a1e

cheers