CONFIG_X86_FRED is not available for thedefaultarchitecture x86.
Result is shown for architecture 64BIT
Flexible Return and Event Delivery
modulename: fred.ko
and/orentry_64_fred.ko
configname: CONFIG_X86_FRED
Linux Kernel Configuration
└─>Processor type and features
└─>Flexible Return and Event Delivery
In linux kernel since version 4.19.314 (release Date: 2024-05-17)
When enabled, try to use Flexible Return and Event Delivery
instead of the legacy SYSCALL/SYSENTER/IDT architecture for
ring transitions and exception/interrupt handling if the
system supports it.
instead of the legacy SYSCALL/SYSENTER/IDT architecture for
ring transitions and exception/interrupt handling if the
system supports it.