[PATCH V2 4/7] arm64: errata: Add detection for TRBE trace data corruption

[Suzuki K Poulose]

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 at arm.com>
> Cc: Will Deacon <will at kernel.org>
> Cc: Mathieu Poirier <mathieu.poirier at linaro.org>
> Cc: Suzuki Poulose <suzuki.poulose at arm.com>
> Cc: coresight at lists.linaro.org
> Cc: linux-doc at vger.kernel.org
> Cc: linux-arm-kernel at lists.infradead.org
> Cc: linux-kernel at vger.kernel.org
> Signed-off-by: Anshuman Khandual <anshuman.khandual at 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 at arm.com>