linux-kernel - Re: [PATCH v2 0/5] arm64: Cleanup ioremap() and support ioremap

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Message-ID: <1331b212-59d8-5e9d-974c-e0f3a47d9879@huawei.com>
Date:   Tue, 10 May 2022 15:06:56 +0800
From:   Kefeng Wang <wangkefeng.wang@...wei.com>
To:     <catalin.marinas@....com>, <will@...nel.org>,
        <akpm@...ux-foundation.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>
CC:     <linux-mm@...ck.org>, <hch@...radead.org>, <arnd@...db.de>
Subject: Re: [PATCH v2 0/5] arm64: Cleanup ioremap() and support
 ioremap_prot()

Hello maintainers，kindly ping.

On 2022/4/29 18:32, Kefeng Wang wrote:
> 1. Enhance generic ioremap to make it more useful.
> 2. Let's arm64 use GENERIC_IOREMAP to cleanup code.
> 3. Support HAVE_IOREMAP_PROT on arm64, which enable generic_access_phys(),
>     it is useful when debug(eg, gdb) via access_process_vm device memory
>     infrastructure.
>
> v2:
> - s/addr/phys_addr in ioremap_prot, suggested by Andrew Morton
> - rename arch_ioremap/iounmap_check to arch_ioremap/iounmad
>    and change return value, per Christoph Hellwig and Andrew Morton
> - and use 'ifndef arch_ioremap' instead of weak function, per Arnd Bergmann
> - collect ack/review
>
> Kefeng Wang (5):
>    mm: ioremap: Use more sensibly name in ioremap_prot()
>    mm: ioremap: Setup phys_addr of struct vm_struct
>    mm: ioremap: Add arch_ioremap/iounmap()
>    arm64: mm: Convert to GENERIC_IOREMAP
>    arm64: Add HAVE_IOREMAP_PROT support
>
>   .../features/vm/ioremap_prot/arch-support.txt |  2 +-
>   arch/arm64/Kconfig                            |  2 +
>   arch/arm64/include/asm/io.h                   | 20 +++--
>   arch/arm64/include/asm/pgtable.h              | 10 +++
>   arch/arm64/kernel/acpi.c                      |  2 +-
>   arch/arm64/mm/hugetlbpage.c                   | 10 ---
>   arch/arm64/mm/ioremap.c                       | 85 +++----------------
>   include/asm-generic/io.h                      | 16 +++-
>   mm/ioremap.c                                  | 27 ++++--
>   9 files changed, 74 insertions(+), 100 deletions(-)
>