Disable EFI runtime services support by default
configname: CONFIG_EFI_DISABLE_RUNTIME
Linux Kernel Configuration
└─>Device Drivers
└─>Firmware Drivers
└─>EFI (Extensible Firmware Interface) Support
└─>Disable EFI runtime services support by default
In linux kernel since version 5.2 (release Date: 2019-07-07)
Allow to disable the EFI runtime services support by default. This can
already be achieved by using the efi=noruntime option, but it could be
useful to have this default without any kernel command line parameter.
The EFI runtime services are disabled by default when PREEMPT_RT is
enabled, because measurements have shown that some EFI functions calls
might take too much time to complete, causing large latencies which is
an issue for Real-Time kernels.
This default can be overridden by using the efi=runtime option.
already be achieved by using the efi=noruntime option, but it could be
useful to have this default without any kernel command line parameter.
The EFI runtime services are disabled by default when PREEMPT_RT is
enabled, because measurements have shown that some EFI functions calls
might take too much time to complete, causing large latencies which is
an issue for Real-Time kernels.
This default can be overridden by using the efi=runtime option.