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Message-ID: <fb1fb13b-a685-ccda-f381-6e6919fdb707@arm.com>
Date:   Fri, 7 Jan 2022 11:58:28 +0000
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Subject: Re: [PATCH V2 4/7] arm64: errata: Add detection for TRBE trace data
 corruption
To:     Anshuman Khandual <anshuman.khandual@arm.com>,
        linux-arm-kernel@lists.infradead.org
Cc:     Catalin Marinas <catalin.marinas@arm.com>,
        Will Deacon <will@kernel.org>,
        Mathieu Poirier <mathieu.poirier@linaro.org>,
        coresight@lists.linaro.org, linux-doc@vger.kernel.org,
        linux-kernel@vger.kernel.org
References: <1641517808-5735-1-git-send-email-anshuman.khandual@arm.com>
 <1641517808-5735-5-git-send-email-anshuman.khandual@arm.com>
From:   Suzuki K Poulose <suzuki.poulose@arm.com>
In-Reply-To: <1641517808-5735-5-git-send-email-anshuman.khandual@arm.com>
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On 07/01/2022 01:10, Anshuman Khandual wrote:
> TRBE implementations affected by Arm erratum #1902691 might corrupt trace
> data or deadlock, when it's being written into the memory. So effectively
> TRBE is broken and hence cannot be used to capture trace data. This adds
> a new errata ARM64_ERRATUM_1902691 in arm64 errata framework.
> 
> Cc: Catalin Marinas <catalin.marinas@arm.com>
> Cc: Will Deacon <will@kernel.org>
> Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
> Cc: Suzuki Poulose <suzuki.poulose@arm.com>
> Cc: coresight@lists.linaro.org
> Cc: linux-doc@vger.kernel.org
> Cc: linux-arm-kernel@lists.infradead.org
> Cc: linux-kernel@vger.kernel.org
> Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com>
> ---
>   Documentation/arm64/silicon-errata.rst |  2 ++
>   arch/arm64/Kconfig                     | 18 ++++++++++++++++++
>   arch/arm64/kernel/cpu_errata.c         |  9 +++++++++
>   arch/arm64/tools/cpucaps               |  1 +
>   4 files changed, 30 insertions(+)

Reviewed-by: Suzuki K Poulose <suzuki.poulose@arm.com>