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

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Message-Id: <20230301082552.274331-1-alexghiti@rivosinc.com>
Date:   Wed,  1 Mar 2023 09:25:50 +0100
From:   Alexandre Ghiti <alexghiti@...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>,
        linux-riscv@...ts.infradead.org, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org
Cc:     Alexandre Ghiti <alexghiti@...osinc.com>
Subject: [PATCH v6 0/2] riscv: Use PUD/P4D/PGD pages for the linear mapping

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

 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