6.6-stable review patch. If anyone has any objections, please let me know.
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From: Huacai Chen chenhuacai@loongson.cn
commit feb8ae81b2378b75a99c81d315602ac8918ed382 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 --- drivers/acpi/acpica/evglock.c | 4 ++++ include/acpi/acpixf.h | 6 ++++++ 2 files changed, 10 insertions(+)
--- a/drivers/acpi/acpica/evglock.c +++ b/drivers/acpi/acpica/evglock.c @@ -42,6 +42,10 @@ acpi_status acpi_ev_init_global_lock_han 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, --- a/include/acpi/acpixf.h +++ b/include/acpi/acpixf.h @@ -214,6 +214,12 @@ ACPI_INIT_GLOBAL(u8, acpi_gbl_osi_data, 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 * execution within a host kernel.