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ACPICA: Allow to skip Global Lock initialization

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commit feb8ae81b2 upstream.

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: Huacai Chen <chenhuacai@loongson.cn>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Cc: Huacai Chen <chenhuacai@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Huacai Chen 2025-09-12 21:54:53 +02:00 committed by Greg Kroah-Hartman
parent 720a66fdaa
commit f775f821de
2 changed files with 10 additions and 0 deletions
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4
drivers/acpi/acpica/evglock.c
View File

@ -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,

6
include/acpi/acpixf.h
View File

@ -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