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authorThorsten Leemhuis <fedora@leemhuis.info>2021-03-17 19:39:07 +0100
committerThorsten Leemhuis <fedora@leemhuis.info>2021-03-17 19:39:07 +0100
commit121cdd55fe1d658ea2a9cad2ed8eb6ae22ed785d (patch)
tree09aca67d95f46d2d6312807b723864452dc37b98 /configs/fedora/generic/arm/aarch64/CONFIG_ARM64_ERRATUM_1508412
parent9d53a3102caf03deb8e8328dd586708b5328b853 (diff)
parentc7a5157d4de03982fcd2e3cd1f035858153ab349 (diff)
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Diffstat (limited to 'configs/fedora/generic/arm/aarch64/CONFIG_ARM64_ERRATUM_1508412')
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diff --git a/configs/fedora/generic/arm/aarch64/CONFIG_ARM64_ERRATUM_1508412 b/configs/fedora/generic/arm/aarch64/CONFIG_ARM64_ERRATUM_1508412
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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