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# CONFIG_ARM64_ERRATUM_1508412:
#
# This option adds a workaround for Arm Cortex-A77 erratum 1508412.
#
# Affected Cortex-A77 cores (r0p0, r1p0) could deadlock on a sequence
# of a store-exclusive or read of PAR_EL1 and a load with device or
# non-cacheable memory attributes. The workaround depends on a firmware
# counterpart.
#
# KVM guests must also have the workaround implemented or they can
# deadlock the system.
#
# Work around the issue by inserting DMB SY barriers around PAR_EL1
# register reads and warning KVM users. The DMB barrier is sufficient
# to prevent a speculative PAR_EL1 read.
#
# If unsure, say Y.
#
# Symbol: ARM64_ERRATUM_1508412 [=y]
# Type : bool
# Defined at arch/arm64/Kconfig:639
# Prompt: Cortex-A77: 1508412: workaround deadlock on sequence of NC/Device load and store exclusive or PAR read
# Location:
# -> Kernel Features
# -> ARM errata workarounds via the alternatives framework
#
#
#
CONFIG_ARM64_ERRATUM_1508412=y
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