Re: [PATCH 1/1] powerpc/kernel/iommu: Align size for IOMMU_PAGE_SIZE() to save TCEs

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