diff options
| author | Anshuman Khandual <anshuman.khandual@arm.com> | 2022-01-25 17:20:37 +0300 |
|---|---|---|
| committer | Suzuki K Poulose <suzuki.poulose@arm.com> | 2022-03-11 13:07:11 +0300 |
| commit | 3a828845ae35626c2c8de4c46f5c602c25bd122d (patch) | |
| tree | 70ddf0d0dbfc8b43c1539465fc8b55a7b587e5c0 /arch/arm64 | |
| parent | f209e9fe5bd7614b30b050f2095e80b77b99c333 (diff) | |
| download | linux-3a828845ae35626c2c8de4c46f5c602c25bd122d.tar.xz | |
coresight: trbe: Work around the trace data corruption
TRBE implementations affected by Arm erratum #1902691 might corrupt trace
data or deadlock, when it's being written into the memory. Workaround this
problem in the driver, by preventing TRBE initialization on affected cpus.
The firmware must have disabled the access to TRBE for the kernel on such
implementations. This will cover the kernel for any firmware that doesn't
do this already. This just updates the TRBE driver as required.
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
Reviewed-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com>
Link: https://lore.kernel.org/r/1643120437-14352-8-git-send-email-anshuman.khandual@arm.com
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Diffstat (limited to 'arch/arm64')
| -rw-r--r-- | arch/arm64/Kconfig | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig index 8c7df3405de2..390f0b1d0144 100644 --- a/arch/arm64/Kconfig +++ b/arch/arm64/Kconfig @@ -847,7 +847,7 @@ config ARM64_ERRATUM_2038923 config ARM64_ERRATUM_1902691 bool "Cortex-A510: 1902691: workaround TRBE trace corruption" - depends on COMPILE_TEST # Until the CoreSight TRBE driver changes are in + depends on CORESIGHT_TRBE default y help This option adds the workaround for ARM Cortex-A510 erratum 1902691. |