linux-kernel - Re: [External] Re: [PATCH v2 0/4] riscv: iommu: Support Svnapot

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Message-ID: <CAPYmKFstx5_huJu05Dv4jEO7CiOJuQb1QVds218tfcFC1G1f7w@mail.gmail.com>
Date: Tue, 18 Mar 2025 11:53:13 +0800
From: Xu Lu <luxu.kernel@...edance.com>
To: Alexandre Ghiti <alex@...ti.fr>
Cc: akpm@...ux-foundation.org, jhubbard@...dia.com, 
	kirill.shutemov@...ux.intel.com, tjeznach@...osinc.com, joro@...tes.org, 
	will@...nel.org, robin.murphy@....com, lihangjing@...edance.com, 
	xieyongji@...edance.com, linux-riscv@...ts.infradead.org, 
	linux-kernel@...r.kernel.org
Subject: Re: [External] Re: [PATCH v2 0/4] riscv: iommu: Support Svnapot

Hi Alex,

Thanks for the reminder. I will resend the patch and cc linux-mm.

Regards,

Xu Lu

On Tue, Mar 18, 2025 at 12:47 AM Alexandre Ghiti <alex@...ti.fr> wrote:
>
> 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(-)
> >
>