From: Qinglin Pan <panqinglin00@gmail.com>
To: paul.walmsley@sifive.com, palmer@dabbelt.com,
linux-riscv@lists.infradead.org
Cc: jeff@riscv.org, xuyinan@ict.ac.cn, conor@kernel.org,
ajones@ventanamicro.com, Qinglin Pan <panqinglin00@gmail.com>
Subject: [PATCH v13 0/3] riscv, mm: detect svnapot cpu support at runtime
Date: Thu, 9 Feb 2023 21:16:44 +0800 [thread overview]
Message-ID: <20230209131647.17245-1-panqinglin00@gmail.com> (raw)
Svnapot is a RISC-V extension for marking contiguous 4K pages as a non-4K
page. This patch set is for using Svnapot in hugetlb fs and huge vmap.
This patchset adds a Kconfig item for using Svnapot in
"Platform type"->"SVNAPOT extension support". Its default value is on,
and people can set it off if they don't allow kernel to detect Svnapot
hardware support and leverage it.
Tested on:
- qemu rv64 with "Svnapot support" off and svnapot=true.
- qemu rv64 with "Svnapot support" on and svnapot=true.
- qemu rv64 with "Svnapot support" off and svnapot=false.
- qemu rv64 with "Svnapot support" on and svnapot=false.
Changes in v2:
- detect Svnapot hardware support at boot time.
Changes in v3:
- do linear mapping again if has_svnapot
Changes in v4:
- fix some errors/warns reported by checkpatch.pl, thanks @Conor
Changes in v5:
- modify code according to @Conor and @Heiko
Changes in v6:
- use static key insead of alternative errata
Changes in v7:
- add napot_cont_order for possible more napot order in the future
- remove linear mapping related code from this patchset to another patch
- refactor hugetlb code for svnapot according to thanks @Andrew @Conor
- use tools/testing/selftests/vm/map_hugetlb as hugetlb testing program
- support svnapot in huge vmap on newer for-next branch
Changes in v8:
- fix compilation errors in rv32_defconfig
- insert some lines of whitespace according to @Conor's suggestion
Changes in v9:
- use alternative to avoid using static branches inside heavily used
inline functions
- change napot_cont_mask definition
- post test_vmalloc modification about testing vmalloc_huge
Changes in v10:
- fix some nits caught by @Andrew
- collect Reviewed-by/Acked-by
- add memory leak warning in KConfig text
- replace test_vmalloc patch link with the standard one
Changes in v11:
- add more detailed warning about HUGETLBFS and SVNAPOT in KConfig text
- fix missing reverse-xmas tree
Changes in v12:
- rebase on the new ISA extension API [1]
Changes in v13:
- fix warnings reported by patchwork
[1]https://lore.kernel.org/all/20230128172856.3814-5-jszhang@kernel.org/
Qinglin Pan (3):
riscv: mm: modify pte format for Svnapot
riscv: mm: support Svnapot in hugetlb page
riscv: mm: support Svnapot in huge vmap
arch/riscv/Kconfig | 21 +-
arch/riscv/include/asm/hugetlb.h | 34 +++-
arch/riscv/include/asm/hwcap.h | 9 +-
arch/riscv/include/asm/page.h | 5 -
arch/riscv/include/asm/pgtable-64.h | 34 ++++
arch/riscv/include/asm/pgtable.h | 39 +++-
arch/riscv/include/asm/vmalloc.h | 61 +++++-
arch/riscv/kernel/cpu.c | 1 +
arch/riscv/kernel/cpufeature.c | 1 +
arch/riscv/mm/hugetlbpage.c | 301 ++++++++++++++++++++++++++++
10 files changed, 493 insertions(+), 13 deletions(-)
--
2.39.1
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next reply other threads:[~2023-02-09 13:17 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-02-09 13:16 Qinglin Pan [this message]
2023-02-09 13:16 ` [PATCH v13 1/3] riscv: mm: modify pte format for Svnapot Qinglin Pan
2023-02-09 14:14 ` Qinglin Pan
2023-02-09 13:16 ` [PATCH v13 2/3] riscv: mm: support Svnapot in hugetlb page Qinglin Pan
2023-02-09 13:16 ` [PATCH v13 3/3] riscv: mm: support Svnapot in huge vmap Qinglin Pan
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