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| author | Catalin Marinas | 2009-04-30 18:06:20 +0200 |
|---|---|---|
| committer | Russell King | 2009-04-30 21:13:00 +0200 |
| commit | 0516e4643cd22fc9f535aef02ad1de66c382c93b (patch) | |
| tree | 8b82945aa5f1ef825656aed2580cacafcd829ac3 /arch/arm/Kconfig | |
| parent | [ARM] 5490/1: ARM errata: Processor deadlock when a false hazard is created (diff) | |
| download | kernel-qcow2-linux-0516e4643cd22fc9f535aef02ad1de66c382c93b.tar.gz kernel-qcow2-linux-0516e4643cd22fc9f535aef02ad1de66c382c93b.tar.xz kernel-qcow2-linux-0516e4643cd22fc9f535aef02ad1de66c382c93b.zip | |
[ARM] 5489/1: ARM errata: Data written to the L2 cache can be overwritten with stale data
This patch is a workaround for the 460075 Cortex-A8 (r2p0) erratum. It
configures the L2 cache auxiliary control register so that the Write
Allocate mode for the L2 cache is disabled.
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 | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index 49f85664083d..9faccc411c2a 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -778,6 +778,18 @@ config ARM_ERRATA_458693 in the ACTLR register. Note that setting specific bits in the ACTLR register may not be available in non-secure mode. +config ARM_ERRATA_460075 + bool "ARM errata: Data written to the L2 cache can be overwritten with stale data" + depends on CPU_V7 + help + This option enables the workaround for the 460075 Cortex-A8 (r2p0) + erratum. Any asynchronous access to the L2 cache may encounter a + situation in which recent store transactions to the L2 cache are lost + and overwritten with stale memory contents from external memory. The + workaround disables the write-allocate mode for the L2 cache via 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" |