Commit 0bd96853 authored by Sebastian Andrzej Siewior's avatar Sebastian Andrzej Siewior Committed by Tejun Heo
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efi: Allow to expose the workqueue via sysfs 



Exposing the efi_rts_wq workqueue via sysfs provides an easy mechanism
to restrict EFI firmware invocation to certain CPU(s).
This can be used to restrict EFI invocations to specific CPUs while
allowing other workqueue to use the remaning CPUs.

Expose the workqueue via sysfs. Change the name to efi_runtime which is
what will be visible under sysfs.

Signed-off-by: default avatarSebastian Andrzej Siewior <bigeasy@linutronix.de>
Acked-by: default avatarArd Biesheuvel <ardb@kernel.org>
Signed-off-by: default avatarTejun Heo <tj@kernel.org>
parent a4aa8d94

drivers/firmware/efi/efi.c

+1 −1
Original line number Diff line number Diff line
@@ -423,7 +423,7 @@ static int __init efisubsys_init(void) 
		 * ordered workqueue (which creates only one execution context)

		 * should suffice for all our needs.

		 */

		efi_rts_wq = alloc_ordered_workqueue("efi_rts_wq", 0);

		efi_rts_wq = alloc_ordered_workqueue("efi_runtime", WQ_SYSFS);

		if (!efi_rts_wq) {

			pr_err("Creating efi_rts_wq failed, EFI runtime services disabled.\n");

			clear_bit(EFI_RUNTIME_SERVICES, &efi.flags);