diff options
| author | Will Deacon <will.deacon@arm.com> | 2011-02-18 16:36:35 +0100 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2011-02-19 11:24:12 +0000 |
| commit | 9a27c27ce49df72b1b0062e2ad192a804e1b069b (patch) | |
| tree | 5b9a40505271f8d0fa2c685e75300fd661a74948 /arch/arm/Kconfig | |
| parent | 71efb063f4a145ae420be054f5a91dcf7c19b375 (diff) | |
| download | lwn-9a27c27ce49df72b1b0062e2ad192a804e1b069b.tar.gz lwn-9a27c27ce49df72b1b0062e2ad192a804e1b069b.zip | |
ARM: 6743/1: errata: interrupted ICALLUIS may prevent completion of broadcasted operation
On versions of the Cortex-A9 prior to r3p0, an interrupted ICIALLUIS
operation may prevent the completion of a following broadcasted
operation if the second operation is received by a CPU before the
ICIALLUIS has completed, potentially leading to corrupted entries in
the cache or TLB.
This workaround sets a bit in the diagnostic register of the Cortex-A9,
causing CP15 maintenance operations to be uninterruptible.
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Will Deacon <will.deacon@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 | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index ba9fc213f344..166efa2a19cd 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -1177,6 +1177,16 @@ config ARM_ERRATA_743622 visible impact on the overall performance or power consumption of the processor. +config ARM_ERRATA_751472 + bool "ARM errata: Interrupted ICIALLUIS may prevent completion of broadcasted operation" + depends on CPU_V7 && SMP + help + This option enables the workaround for the 751472 Cortex-A9 (prior + to r3p0) erratum. An interrupted ICIALLUIS operation may prevent the + completion of a following broadcasted operation if the second + operation is received by a CPU before the ICIALLUIS has completed, + potentially leading to corrupted entries in the cache or TLB. + config ARM_ERRATA_753970 bool "ARM errata: cache sync operation may be faulty" depends on CACHE_PL310 |