Commit feb8ae81 authored by Huacai Chen's avatar Huacai Chen Committed by Rafael J. Wysocki
Browse files

ACPICA: Allow to skip Global Lock initialization 

Introduce acpi_gbl_use_global_lock, which allows to skip the Global Lock
initialization. This is useful for systems without Global Lock (such as
loong_arch), so as to avoid error messages during boot phase:

 ACPI Error: Could not enable global_lock event (20240827/evxfevnt-182)
 ACPI Error: No response from Global Lock hardware, disabling lock (20240827/evglock-59)

Link: https://github.com/acpica/acpica/commit/463cb0fe


Signed-off-by: default avatarHuacai Chen <chenhuacai@loongson.cn>
Signed-off-by: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
parent 9d2f57fe

drivers/acpi/acpica/evglock.c

+4 −0
Original line number Diff line number Diff line
@@ -42,6 +42,10 @@ acpi_status acpi_ev_init_global_lock_handler(void) 
		return_ACPI_STATUS(AE_OK);

	}



	if (!acpi_gbl_use_global_lock) {

		return_ACPI_STATUS(AE_OK);

	}



	/* Attempt installation of the global lock handler */



	status = acpi_install_fixed_event_handler(ACPI_EVENT_GLOBAL,

include/acpi/acpixf.h

+6 −0
Original line number Diff line number Diff line
@@ -213,6 +213,12 @@ ACPI_INIT_GLOBAL(u8, acpi_gbl_osi_data, 0); 
 */

ACPI_INIT_GLOBAL(u8, acpi_gbl_reduced_hardware, FALSE);



/*

 * ACPI Global Lock is mainly used for systems with SMM, so no-SMM systems

 * (such as loong_arch) may not have and not use Global Lock.

 */

ACPI_INIT_GLOBAL(u8, acpi_gbl_use_global_lock, TRUE);



/*

 * Maximum timeout for While() loop iterations before forced method abort.

 * This mechanism is intended to prevent infinite loops during interpreter