linux-kernel - [PATCH V12 0/4] mm/sparse-vmemmap: Generalise helpers and enable for LoongArch

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Message-Id: <20221020072317.492906-1-chenhuacai@loongson.cn>
Date:   Thu, 20 Oct 2022 15:23:13 +0800
From:   Huacai Chen <chenhuacai@...ngson.cn>
To:     Arnd Bergmann <arnd@...db.de>, Huacai Chen <chenhuacai@...nel.org>,
        Thomas Bogendoerfer <tsbogend@...ha.franken.de>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        Andy Lutomirski <luto@...nel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will@...nel.org>,
        Dinh Nguyen <dinguyen@...nel.org>
Cc:     loongarch@...ts.linux.dev, linux-arch@...r.kernel.org,
        Xuefeng Li <lixuefeng@...ngson.cn>,
        Guo Ren <guoren@...nel.org>, Xuerui Wang <kernel@...0n.name>,
        Jiaxun Yang <jiaxun.yang@...goat.com>,
        Andrew Morton <akpm@...ux-foundation.org>, linux-mm@...ck.org,
        linux-mips@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        Huacai Chen <chenhuacai@...ngson.cn>,
        Feiyang Chen <chenfeiyang@...ngson.cn>
Subject: [PATCH V12 0/4] mm/sparse-vmemmap: Generalise helpers and enable for LoongArch

This series is in order to enable sparse-vmemmap for LoongArch. But
LoongArch cannot use generic helpers directly because MIPS&LoongArch
need to call pgd_init()/pud_init()/pmd_init() when populating page
tables. So we adjust the prototypes of p?d_init() to make generic
helpers can call them, then enable sparse-vmemmap with generic helpers,
and to be further, generalise vmemmap_populate_hugepages() for ARM64,
X86 and LoongArch.

V1 -> V2:
Split ARCH_WANT_HUGETLB_PAGE_OPTIMIZE_VMEMMAP to a separate patch.

V2 -> V3:
1, Change the Signed-off-by order of author and committer;
2, Update commit message about the build error on LoongArch.

V3 -> V4:
Change pmd to pmdp for ARM64 for consistency.

V4 -> V5:
Add a detailed comment for no-fallback in the altmap case.

V5 -> V6:
1, Fix build error for NIOS2;
2, Fix build error for allnoconfig;
3, Update comment for no-fallback in the altmap case.

V6 -> V7:
Fix build warnings of "no previous prototype".

V7 -> V8:
Fix build error for MIPS pud_init().

V8 -> V9:
Remove redundant #include to avoid build error with latest upstream
kernel.

V9 -> V10:
Fix build error due to VMEMMAP changes in 6.0-rc1.

V10 -> V11:
Adjust context due to ARM64 changes in 6.1-rc1.

V11 -> V12:
1, Fix build error for !SPARSEMEM;
2, Simplify pagetable_init() for MIPS32.

Huacai Chen and Feiyang Chen(4):
 MIPS&LoongArch&NIOS2: Adjust prototypes of p?d_init().
 LoongArch: Add sparse memory vmemmap support.
 mm/sparse-vmemmap: Generalise vmemmap_populate_hugepages().
 LoongArch: Enable ARCH_WANT_HUGETLB_PAGE_OPTIMIZE_VMEMMAP.

Signed-off-by: Huacai Chen <chenhuacai@...ngson.cn>
Signed-off-by: Feiyang Chen <chenfeiyang@...ngson.cn> 
---
 arch/arm64/mm/mmu.c                    | 53 ++++++--------------
 arch/loongarch/Kconfig                 |  2 +
 arch/loongarch/include/asm/pgalloc.h   | 13 +----
 arch/loongarch/include/asm/pgtable.h   | 13 +++--
 arch/loongarch/include/asm/sparsemem.h |  8 +++
 arch/loongarch/kernel/numa.c           |  4 +-
 arch/loongarch/mm/init.c               | 44 +++++++++++++++-
 arch/loongarch/mm/pgtable.c            | 23 +++++----
 arch/mips/include/asm/pgalloc.h        |  8 +--
 arch/mips/include/asm/pgtable-64.h     |  8 +--
 arch/mips/kvm/mmu.c                    |  3 +-
 arch/mips/mm/pgtable-32.c              | 10 ++--
 arch/mips/mm/pgtable-64.c              | 18 ++++---
 arch/mips/mm/pgtable.c                 |  2 +-
 arch/x86/mm/init_64.c                  | 92 ++++++++++++----------------------
 include/linux/mm.h                     |  8 +++
 include/linux/page-flags.h             |  1 +
 mm/sparse-vmemmap.c                    | 64 +++++++++++++++++++++++
 18 files changed, 222 insertions(+), 152 deletions(-)
--
2.27.0