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Date:   Mon, 18 Apr 2022 14:12:09 +0800
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Subject: Re: [PATCH -next v4 0/4]mm: page_table_check: add support on arm64
 and riscv
To:     Thomas Gleixner <tglx@linutronix.de>,
        Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
        Dave Hansen <dave.hansen@linux.intel.com>, <x86@kernel.org>,
        "H. Peter Anvin" <hpa@zytor.com>,
        Pasha Tatashin <pasha.tatashin@soleen.com>,
        Andrew Morton <akpm@linux-foundation.org>,
        Catalin Marinas <catalin.marinas@arm.com>,
        Will Deacon <will@kernel.org>,
        Paul Walmsley <paul.walmsley@sifive.com>,
        Palmer Dabbelt <palmer@dabbelt.com>,
        Albert Ou <aou@eecs.berkeley.edu>
CC:     <linux-kernel@vger.kernel.org>, <linux-mm@kvack.org>,
        <linux-arm-kernel@lists.infradead.org>,
        <linux-riscv@lists.infradead.org>,
        Kefeng Wang <wangkefeng.wang@huawei.com>,
        Guohanjun <guohanjun@huawei.com>
References: <20220418034444.520928-1-tongtiangen@huawei.com>
From:   Tong Tiangen <tongtiangen@huawei.com>
In-Reply-To: <20220418034444.520928-1-tongtiangen@huawei.com>
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Hi Andrew, Catalin, Palmer:

This patch modifies the code related to the mm/x86/arm64/riscv, who can 
help me merge it if no object, Maybe Andrew is more appropriate?

Thanks,
Tong.

在 2022/4/18 11:44, Tong Tiangen 写道:
> Page table check performs extra verifications at the time when new
> pages become accessible from the userspace by getting their page
> table entries (PTEs PMDs etc.) added into the table. It is supported
> on X86[1].
> 
> This patchset made some simple changes and make it easier to support
> new architecture, then we support this feature on ARM64 and RISCV.
> 
> [1]https://lore.kernel.org/lkml/20211123214814.3756047-1-pasha.tatashin@soleen.com/
> 
> v3 -> v4:
>   1. Adapt to next-20220414
> 
> v2 -> v3:
>    1. Modify ptep_clear() in include/linux/pgtable.h, using IS_ENABLED
>       according to the suggestions of Pasha.
> 
> v1 -> v2:
>    1. Fix arm64's pte/pmd/pud_user_accessible_page() according to the
>       suggestions of Catalin.
>    2. Also fix riscv's pte_pmd_pud_user_accessible_page().
> 
> Kefeng Wang (2):
>    mm: page_table_check: move pxx_user_accessible_page into x86
>    arm64: mm: add support for page table check
> 
> Tong Tiangen (2):
>    mm: page_table_check: add hooks to public helpers
>    riscv: mm: add support for page table check
> 
>   arch/arm64/Kconfig               |  1 +
>   arch/arm64/include/asm/pgtable.h | 65 ++++++++++++++++++++++++---
>   arch/riscv/Kconfig               |  1 +
>   arch/riscv/include/asm/pgtable.h | 77 +++++++++++++++++++++++++++++---
>   arch/x86/include/asm/pgtable.h   | 29 +++++++-----
>   include/linux/pgtable.h          | 26 +++++++----
>   mm/page_table_check.c            | 25 ++++-------
>   7 files changed, 178 insertions(+), 46 deletions(-)
>