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Diffstat (limited to 'arch/arm64/Kconfig')
| -rw-r--r-- | arch/arm64/Kconfig | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig index f858c352f72a..1d466addb078 100644 --- a/arch/arm64/Kconfig +++ b/arch/arm64/Kconfig @@ -636,6 +636,26 @@ config ARM64_ERRATUM_1542419 If unsure, say Y. +config ARM64_ERRATUM_1508412 + bool "Cortex-A77: 1508412: workaround deadlock on sequence of NC/Device load and store exclusive or PAR read" + default y + help + 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. + config CAVIUM_ERRATUM_22375 bool "Cavium erratum 22375, 24313" default y |