CONFIG_X86_X2APIC is not available for thedefaultarchitecture x86.
Result is shown for architecture 64BIT
x2APIC interrupt controller architecture support
modulename: x2apic_phys.ko
and/orx2apic_cluster.ko
configname: CONFIG_X86_X2APIC
Linux Kernel Configuration
└─>Processor type and features
└─>x2APIC interrupt controller architecture support
In linux kernel since version 2.6.30 (release Date: 2009-06-09)
x2APIC is an interrupt controller architecture, a component of which
(the local APIC) is present in the CPU. It allows faster access to
the local APIC and supports a larger number of CPUs in the system
than the predecessors.
x2APIC was introduced in Intel CPUs around 2008 and in AMD EPYC CPUs
in 2019, but it can be disabled by the BIOS. It is also frequently
emulated in virtual machines, even when the host CPU does not support
it. Support in the CPU can be checked by executing
grep x2apic /proc/cpuinfo
If this configuration option is disabled, the kernel will boot with
very reduced functionality and performance on some platforms that
have x2APIC enabled. On the other hand, on hardware that does not
support x2APIC, a kernel with this option enabled will just fallback
to older APIC implementations.
If in doubt, say Y.
(the local APIC) is present in the CPU. It allows faster access to
the local APIC and supports a larger number of CPUs in the system
than the predecessors.
x2APIC was introduced in Intel CPUs around 2008 and in AMD EPYC CPUs
in 2019, but it can be disabled by the BIOS. It is also frequently
emulated in virtual machines, even when the host CPU does not support
it. Support in the CPU can be checked by executing
grep x2apic /proc/cpuinfo
If this configuration option is disabled, the kernel will boot with
very reduced functionality and performance on some platforms that
have x2APIC enabled. On the other hand, on hardware that does not
support x2APIC, a kernel with this option enabled will just fallback
to older APIC implementations.
If in doubt, say Y.