linux-kernel - Re: [PATCH v6 0/2] riscv: Use PUD/P4D/PGD pages for the linear mapping

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Date:   Mon, 6 Mar 2023 19:51:54 +0100
From:   Alexandre Ghiti <alexghiti@...osinc.com>
To:     Anup Patel <apatel@...tanamicro.com>
Cc:     Paul Walmsley <paul.walmsley@...ive.com>,
        Palmer Dabbelt <palmer@...belt.com>,
        Albert Ou <aou@...s.berkeley.edu>,
        Rob Herring <robh+dt@...nel.org>,
        Frank Rowand <frowand.list@...il.com>,
        linux-riscv@...ts.infradead.org, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org
Subject: Re: [PATCH v6 0/2] riscv: Use PUD/P4D/PGD pages for the linear mapping

Hi Anup,

On Mon, Mar 6, 2023 at 5:33 PM Anup Patel <apatel@...tanamicro.com> wrote:
>
> On Wed, Mar 1, 2023 at 1:56 PM Alexandre Ghiti <alexghiti@...osinc.com> wrote:
> >
> > This patchset intends to improve tlb utilization by using hugepages for
> > the linear mapping.
> >
> > base-commit-tag: v6.2-rc7
> >
> > v6:
> > - quiet LLVM warning by casting phys_ram_base into an unsigned long
> >
> > v5:
> > - Fix nommu builds by getting rid of riscv_pfn_base in patch 1, thanks
> >   Conor
> > - Add RB from Andrew
> >
> > v4:
> > - Rebase on top of v6.2-rc3, as noted by Conor
> > - Add Acked-by Rob
> >
> > v3:
> > - Change the comment about initrd_start VA conversion so that it fits
> >   ARM64 and RISCV64 (and others in the future if needed), as suggested
> >   by Rob
> >
> > v2:
> > - Add a comment on why RISCV64 does not need to set initrd_start/end that
> >   early in the boot process, as asked by Rob
> >
> > Alexandre Ghiti (2):
> >   riscv: Get rid of riscv_pfn_base variable
> >   riscv: Use PUD/P4D/PGD pages for the linear mapping
>
> I tried this series but it is getting stuck after reaching user space.
>
> Does this series require some other dependent patches ?

No it should not. Let me take a look: what's your config and the base commit?

>
> Regards,
> Anup
>
> >
> >  arch/riscv/include/asm/page.h | 19 +++++++++++++++++--
> >  arch/riscv/mm/init.c          | 28 ++++++++++++++++++----------
> >  arch/riscv/mm/physaddr.c      | 16 ++++++++++++++++
> >  drivers/of/fdt.c              | 11 ++++++-----
> >  4 files changed, 57 insertions(+), 17 deletions(-)
> >
> > --
> > 2.37.2
> >