linux-kernel - Re: [PATCH v2] arm64: mm: don't use CON and BLK mapping if KFENCE is enabled

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Message-Id: <162195131724.26304.9816849348015861632.b4-ty@arm.com>
Date:   Tue, 25 May 2021 15:02:04 +0100
From:   Catalin Marinas <catalin.marinas@....com>
To:     Marco Elver <elver@...gle.com>,
        Jisheng Zhang <Jisheng.Zhang@...aptics.com>,
        Mark Rutland <mark.rutland@....com>,
        Will Deacon <will@...nel.org>
Cc:     linux-arm-kernel@...ts.infradead.org, stable@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Alexander Potapenko <glider@...gle.com>
Subject: Re: [PATCH v2] arm64: mm: don't use CON and BLK mapping if KFENCE is enabled

On Tue, 25 May 2021 10:45:51 +0800, Jisheng Zhang wrote:
> When we added KFENCE support for arm64, we intended that it would
> force the entire linear map to be mapped at page granularity, but we
> only enforced this in arch_add_memory() and not in map_mem(), so
> memory mapped at boot time can be mapped at a larger granularity.
> 
> When booting a kernel with KFENCE=y and RODATA_FULL=n, this results in
> the following WARNING at boot:
> 
> [...]

Applied to arm64 (for-next/fixes), thanks!

[1/1] arm64: mm: don't use CON and BLK mapping if KFENCE is enabled
      https://git.kernel.org/arm64/c/e69012400b0c

-- 
Catalin