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| author | Catalin Marinas <catalin.marinas@arm.com> | 2009-04-30 17:06:15 +0100 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2009-04-30 20:12:59 +0100 |
| commit | 855c551f5b8cc3815d58e1056c1f1e7c461e2d24 (patch) | |
| tree | c2a84666b3a86c3e5cb5272ed42b802f9411ec33 /arch/arm/Kconfig | |
| parent | 7ce236fcd6fd45b0441a2d49acb2ceb2de2e8a47 (diff) | |
| download | linux-855c551f5b8cc3815d58e1056c1f1e7c461e2d24.tar.gz linux-855c551f5b8cc3815d58e1056c1f1e7c461e2d24.tar.bz2 linux-855c551f5b8cc3815d58e1056c1f1e7c461e2d24.zip | |
[ARM] 5490/1: ARM errata: Processor deadlock when a false hazard is created
This patch adds a workaround for the 458693 Cortex-A8 (r2p0)
erratum. It sets the corresponding bits in the auxiliary control
register so that the PLD instruction becomes a NOP.
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm/Kconfig')
| -rw-r--r-- | arch/arm/Kconfig | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index 84e4816362b3..49f85664083d 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -765,6 +765,19 @@ config ARM_ERRATA_430973 Note that setting specific bits in the ACTLR register may not be available in non-secure mode. +config ARM_ERRATA_458693 + bool "ARM errata: Processor deadlock when a false hazard is created" + depends on CPU_V7 + help + This option enables the workaround for the 458693 Cortex-A8 (r2p0) + erratum. For very specific sequences of memory operations, it is + possible for a hazard condition intended for a cache line to instead + be incorrectly associated with a different cache line. This false + hazard might then cause a processor deadlock. The workaround enables + the L1 caching of the NEON accesses and disables the PLD instruction + in the ACTLR register. Note that setting specific bits in the ACTLR + register may not be available in non-secure mode. + endmenu source "arch/arm/common/Kconfig" |