linux-kernel - Re: [PATCH Resend v2 0/3] ARM: Support KFENCE feature

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Message-ID: <8a4dbf98-1ac0-d48d-98fa-c7392e6a4de1@huawei.com>
Date:   Mon, 29 Nov 2021 22:55:20 +0800
From:   Kefeng Wang <wangkefeng.wang@...wei.com>
To:     <linux@...linux.org.uk>, <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>
CC:     <glider@...gle.com>, <elver@...gle.com>, <dvyukov@...gle.com>
Subject: Re: [PATCH Resend v2 0/3] ARM: Support KFENCE feature

Hi Russell，

Could I send this to ARM patch system if no more comments,

what about your opinion, thanks.

On 2021/11/15 21:48, Kefeng Wang wrote:
> This patchset supports Kfence feature, tested the kfence_test on ARM QEMU
> with or without ARM_LPAE and all passed.
>
> V2 Resend:
> - adjust is_write_fault() position in patch2 not patch3, sugguested Alexander
> - Add ACKed from Marco
> - rebased on v5.16-rc1
>
> V2:
> - drop patch4 in v1, which is used a new way to skip kfence test
>    see commit c40c6e593bf9 ("kfence: test: fail fast if disabled at boot")
> - fix some issue about NO MMU
>    - drop useless set_memory_valid() under no mmu
>    - fix implicit declaration of function ‘is_write_fault’ if no mmu
> - make KFENCE depends on !XIP_KERNEL, no tested with xip
>
> v1:
> https://lore.kernel.org/linux-arm-kernel/20210825092116.149975-1-wangkefeng.wang@huawei.com/
>
> Kefeng Wang (3):
>    ARM: mm: Provide set_memory_valid()
>    ARM: mm: Provide is_write_fault()
>    ARM: Support KFENCE for ARM
>
>   arch/arm/Kconfig                  |  1 +
>   arch/arm/include/asm/kfence.h     | 53 +++++++++++++++++++++++++++++++
>   arch/arm/include/asm/set_memory.h |  1 +
>   arch/arm/mm/fault.c               | 16 ++++++++--
>   arch/arm/mm/pageattr.c            | 42 ++++++++++++++++++------
>   5 files changed, 100 insertions(+), 13 deletions(-)
>   create mode 100644 arch/arm/include/asm/kfence.h
>