diff options
| author | Catalin Marinas <catalin.marinas@arm.com> | 2011-08-15 11:04:41 +0100 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2011-08-15 11:58:59 +0100 |
| commit | 145e10e173c8adf4804334fb0dd10028300a7a7a (patch) | |
| tree | 37409358acf86db952e0216fa528d289eef4fc4d /arch/arm/Kconfig | |
| parent | 43c734be5571a4daad9f0a3e0b3229a1c0049917 (diff) | |
| download | lwn-145e10e173c8adf4804334fb0dd10028300a7a7a.tar.gz lwn-145e10e173c8adf4804334fb0dd10028300a7a7a.zip | |
ARM: 7015/1: ARM errata: Possible cache data corruption with hit-under-miss enabled
This patch is a workaround for the 364296 ARM1136 r0p2 erratum (possible
cache data corruption with hit-under-miss enabled). It sets the
undocumented bit 31 in the auxiliary control register and the FI bit in
the control register, thus disabling hit-under-miss without putting the
processor into full low interrupt latency mode.
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Tested-by: Siarhei Siamashka <siarhei.siamashka@gmail.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 5ebc5d922ea1..3269576dbfa8 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -1271,6 +1271,18 @@ config ARM_ERRATA_754327 This workaround defines cpu_relax() as smp_mb(), preventing correctly written polling loops from denying visibility of updates to memory. +config ARM_ERRATA_364296 + bool "ARM errata: Possible cache data corruption with hit-under-miss enabled" + depends on CPU_V6 && !SMP + help + This options enables the workaround for the 364296 ARM1136 + r0p2 erratum (possible cache data corruption with + hit-under-miss enabled). It sets the undocumented bit 31 in + the auxiliary control register and the FI bit in the control + register, thus disabling hit-under-miss without putting the + processor into full low interrupt latency mode. ARM11MPCore + is not affected. + endmenu source "arch/arm/common/Kconfig" |