linux-kernel - Re: [PATCH v9 0/3] riscv: Use PUD/P4D/PGD pages for the linear mapping

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Message-Id: <168191414582.1929.5343150179757042159.b4-ty@rivosinc.com>
Date:   Wed, 19 Apr 2023 07:22:25 -0700
From:   Palmer Dabbelt <palmer@...osinc.com>
To:     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>,
        Andrew Jones <ajones@...tanamicro.com>,
        Anup Patel <anup@...infault.org>,
        linux-riscv@...ts.infradead.org, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org,
        Alexandre Ghiti <alexghiti@...osinc.com>
Subject: Re: [PATCH v9 0/3] riscv: Use PUD/P4D/PGD pages for the linear
 mapping


On Fri, 24 Mar 2023 16:54:18 +0100, Alexandre Ghiti wrote:
> This patchset intends to improve tlb utilization by using hugepages for
> the linear mapping.
> 
> As reported by Anup in v6, when STRICT_KERNEL_RWX is enabled, we must
> take care of isolating the kernel text and rodata so that they are not
> mapped with a PUD mapping which would then assign wrong permissions to
> the whole region: it is achieved the same way as arm64 by using the
> memblock nomap API which isolates those regions and re-merge them afterwards
> thus avoiding any issue with the system resources tree creation.
> 
> [...]

Applied, thanks!

[1/3] riscv: Get rid of riscv_pfn_base variable
      https://git.kernel.org/palmer/c/a7407a1318a9
[2/3] riscv: Move the linear mapping creation in its own function
      https://git.kernel.org/palmer/c/8589e346bbb6
[3/3] riscv: Use PUD/P4D/PGD pages for the linear mapping
      https://git.kernel.org/palmer/c/3335068f8721

Best regards,
-- 
Palmer Dabbelt <palmer@...osinc.com>