On Thu, 18 Mar 2021 14:44:14 -0300, Leonardo Bras wrote:
> Currently both iommu_alloc_coherent() and iommu_free_coherent() align the
> desired allocation size to PAGE_SIZE, and gets system pages and IOMMU
> mappings (TCEs) for that value.
>
> When IOMMU_PAGE_SIZE < PAGE_SIZE, this behavior may cause unnecessary
> TCEs to be created for mapping the whole system page.
>
> [...]
Applied to powerpc/next.
[1/1] powerpc/kernel/iommu: Align size for IOMMU_PAGE_SIZE() to save TCEs
https://git.kernel.org/powerpc/c/3c0468d4451eb6b4f6604370639f163f9637a479
cheers
