Re: [PATCH v2 0/4] riscv: iommu: Support Svnapot

[Alexandre Ghiti]

Hi Xu,

You did not +cc linux-mm on your series, it would be nice to have 
feedback from them. I'd say it would be easier to resend the whole 
patchset with them in +cc.

Thanks,

Alex

On 11/03/2025 13:25, Xu Lu wrote:
> According to the RISC-V IOMMU hardware spec, the IOMMU implementation
> has the same translation process as MMU and supports Svnapot standard
> extension as well. These patches add support for Svnapot in the IOMMU
> driver to make 64K also an available page size during DMA mapping.
>
> Changes in V2:
> 1. Supply more details about huge pte issue in follow_page_pte().
> 2. Fix some style problems.
>
> Xu Lu (4):
>    mm/gup: Add huge pte handling logic in follow_page_pte()
>    iommu/riscv: Use pte_t to represent page table entry
>    iommu/riscv: Introduce IOMMU page table lock
>    iommu/riscv: Add support for Svnapot
>
>   arch/riscv/include/asm/pgtable.h |   6 +
>   drivers/iommu/riscv/iommu.c      | 258 +++++++++++++++++++++++++------
>   include/linux/pgtable.h          |   8 +
>   mm/gup.c                         |  17 +-
>   4 files changed, 233 insertions(+), 56 deletions(-)