CONFIG_ARM_ERRATA_742231 is not available for thedefaultarchitecture x86.
Result is shown for architecture arm
ARM errata: Incorrect hazard handling in the SCU may lead to data corruption
configname: CONFIG_ARM_ERRATA_742231
Linux Kernel Configuration
└─>System Type
└─>ARM errata: Incorrect hazard handling in the SCU may lead to data corruption
In linux kernel since version 2.6.36 (release Date: 2010-10-20)
This option enables the workaround for the 742231 Cortex-A9
(r2p0..r2p2) erratum. Under certain conditions, specific to the
Cortex-A9 MPCore micro-architecture, two CPUs working in SMP mode,
accessing some data located in the same cache line, may get corrupted
data due to bad handling of the address hazard when the line gets
replaced from one of the CPUs at the same time as another CPU is
accessing it. This workaround sets specific bits in the diagnostic
register of the Cortex-A9 which reduces the linefill issuing
capabilities of the processor. Note that setting specific bits in the
diagnostics register may not be available in non-secure mode and thus
is not available on a multiplatform kernel. This should be applied by
the bootloader instead.
(r2p0..r2p2) erratum. Under certain conditions, specific to the
Cortex-A9 MPCore micro-architecture, two CPUs working in SMP mode,
accessing some data located in the same cache line, may get corrupted
data due to bad handling of the address hazard when the line gets
replaced from one of the CPUs at the same time as another CPU is
accessing it. This workaround sets specific bits in the diagnostic
register of the Cortex-A9 which reduces the linefill issuing
capabilities of the processor. Note that setting specific bits in the
diagnostics register may not be available in non-secure mode and thus
is not available on a multiplatform kernel. This should be applied by
the bootloader instead.