efi: Allow efi=runtime

In case the command line option "efi=noruntime" is default at built-time, the user
could overwrite its state by `efi=runtime' and allow it again.

This is useful on PREEMPT_RT where "efi=noruntime" is default and the
user might need to alter the boot order for instance.

Acked-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>

diff --git a/drivers/firmware/efi/efi.c b/drivers/firmware/efi/efi.c
index 39031cfcb6b92597e3897065ec02c50814645680..ae79c33001297aba6fbf6f6b4dc572b6dc317702 100644 (file)
--- a/drivers/firmware/efi/efi.c
+++ b/drivers/firmware/efi/efi.c
@@ -97,6 +97,9 @@ static int __init parse_efi_cmdline(char *str)
        if (parse_option_str(str, "noruntime"))
                disable_runtime = true;
 
+       if (parse_option_str(str, "runtime"))
+               disable_runtime = false;
+
        if (parse_option_str(str, "nosoftreserve"))
                set_bit(EFI_MEM_NO_SOFT_RESERVE, &efi.flags);