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authorAnshuman Khandual <anshuman.khandual@arm.com>2022-01-25 17:20:37 +0300
committerSuzuki K Poulose <suzuki.poulose@arm.com>2022-03-11 13:07:11 +0300
commit3a828845ae35626c2c8de4c46f5c602c25bd122d (patch)
tree70ddf0d0dbfc8b43c1539465fc8b55a7b587e5c0 /arch/arm64
parentf209e9fe5bd7614b30b050f2095e80b77b99c333 (diff)
downloadlinux-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/Kconfig2
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.