kernelconfig_penguin
CONFIG_ARM64_ERRATUM_1508412 is not available for the default architecture x86.
Result is shown for architecture arm64
default or selected kernelversion does not have config value CONFIG_ARM64_ERRATUM_1508412.
Result is shown for kernelversion 5.10-rc5

Cortex-A77: 1508412: workaround deadlock on sequence of NC/Device load and store exclusive or PAR read

configname: CONFIG_ARM64_ERRATUM_1508412

Linux Kernel Configuration
└─> Kernel Features
└─> ARM errata workarounds via the alternatives framework
└─> Cortex-A77: 1508412: workaround deadlock on sequence of NC/Device load and store exclusive or PAR read

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.