CONFIG_ARM_ERRATA_798181 is not available for thedefaultarchitecture x86.
Result is shown for architecture arm

ARM errata: TLBI/DSB failure on Cortex-A15

configname: CONFIG_ARM_ERRATA_798181

Linux Kernel Configuration
└─>System Type
└─>ARM errata: TLBI/DSB failure on Cortex-A15
In linux kernel since version 3.1 (release Date: 2011-10-24)  
On Cortex-A15 (r0p0..r3p2) the TLBI*IS/DSB operations are not
adequately shooting down all use of the old entries. This
option enables the Linux kernel workaround for this erratum
which sends an IPI to the CPUs that are running the same ASID
as the one being invalidated.