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| author | Jon Medhurst | 2013-06-07 11:35:35 +0200 |
|---|---|---|
| committer | Russell King | 2013-06-17 11:30:49 +0200 |
| commit | 691557941af4c12bd307ad81a4d9fa9c7743ac28 (patch) | |
| tree | 7382502cccc9bff1e3ca38f353f335d70a376ded /arch/arm/Kconfig | |
| parent | ARM: 7747/1: pcpu: ensure __my_cpu_offset cannot be re-ordered across barrier() (diff) | |
| download | kernel-qcow2-linux-691557941af4c12bd307ad81a4d9fa9c7743ac28.tar.gz kernel-qcow2-linux-691557941af4c12bd307ad81a4d9fa9c7743ac28.tar.xz kernel-qcow2-linux-691557941af4c12bd307ad81a4d9fa9c7743ac28.zip | |
ARM: 7752/1: errata: LoUIS bit field in CLIDR register is incorrect
On Cortex-A9 before version r1p0, the LoUIS bit field of the CLIDR
register returns zero when it should return one. This leads to cache
maintenance operations which rely on this value to not function as
intended, causing data corruption.
The workaround for this errata is to detect affected CPUs and correct
the LoUIS value read.
Acked-by: Will Deacon <will.deacon@arm.com>
Acked-by: Nicolas Pitre <nico@linaro.org>
Cc: stable@vger.kernel.org
Signed-off-by: Jon Medhurst <tixy@linaro.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm/Kconfig')
| -rw-r--r-- | arch/arm/Kconfig | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index 49d993cee512..239fa96c12bb 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -1189,6 +1189,16 @@ config PL310_ERRATA_588369 is not correctly implemented in PL310 as clean lines are not invalidated as a result of these operations. +config ARM_ERRATA_643719 + bool "ARM errata: LoUIS bit field in CLIDR register is incorrect" + depends on CPU_V7 && SMP + help + This option enables the workaround for the 643719 Cortex-A9 (prior to + r1p0) erratum. On affected cores the LoUIS bit field of the CLIDR + register returns zero when it should return one. The workaround + corrects this value, ensuring cache maintenance operations which use + it behave as intended and avoiding data corruption. + config ARM_ERRATA_720789 bool "ARM errata: TLBIASIDIS and TLBIMVAIS operations can broadcast a faulty ASID" depends on CPU_V7 |