[tip: efi/core] efi: Allow efi=runtime

[tip: efi/core] efi: Allow efi=runtime

[tip-bot2 for Sebastian Andrzej Siewior]

The following commit has been merged into the efi/core branch of tip:

Commit-ID:     720dff78de360ad9742d5f438101cedcdb5dad84
Gitweb:        https://git.kernel.org/tip/720dff78de360ad9742d5f438101cedcdb5dad84
Author:        Sebastian Andrzej Siewior <bigeasy@linutronix.de>
AuthorDate:    Fri, 24 Sep 2021 15:49:19 +02:00
Committer:     Ard Biesheuvel <ardb@kernel.org>
CommitterDate: Tue, 28 Sep 2021 22:44:15 +02:00

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>
---
 drivers/firmware/efi/efi.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/firmware/efi/efi.c b/drivers/firmware/efi/efi.c
index 39031cf..ae79c33 100644
--- 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);