Commit b75dd297 authored by Lv Zheng's avatar Lv Zheng Committed by Rafael J. Wysocki
Browse files

ACPICA: Add option to disable loading of SSDTs from the RSDT/XSDT 

Optionally do not load any SSDTs from the RSDT/XSDT during
initialization.  This can be useful for overriding SSDTs
using DSDT overriding, thus useful for debugging ACPI
problems on some machines.  Lv Zheng. ACPICA BZ 1005.

References: https://bugs.acpica.org/show_bug.cgi?id=1005


Signed-off-by: default avatarLv Zheng <lv.zheng@intel.com>
Signed-off-by: default avatarBob Moore <robert.moore@intel.com>
Signed-off-by: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
parent 1d1ea1b7

drivers/acpi/acpica/acglobal.h

+6 −0
Original line number Diff line number Diff line
@@ -132,6 +132,12 @@ u8 ACPI_INIT_GLOBAL(acpi_gbl_truncate_io_addresses, FALSE); 
 */

u8 ACPI_INIT_GLOBAL(acpi_gbl_disable_auto_repair, FALSE);



/*

 * Optionally do not load any SSDTs from the RSDT/XSDT during initialization.

 * This can be useful for debugging ACPI problems on some machines.

 */

u8 ACPI_INIT_GLOBAL(acpi_gbl_disable_ssdt_table_load, FALSE);



/* acpi_gbl_FADT is a local copy of the FADT, converted to a common format. */



struct acpi_table_fadt acpi_gbl_FADT;

drivers/acpi/acpica/tbxfload.c

+10 −15
Original line number Diff line number Diff line
@@ -53,8 +53,6 @@ ACPI_MODULE_NAME("tbxfload") 
/* Local prototypes */

static acpi_status acpi_tb_load_namespace(void);



static int no_auto_ssdt;



/*******************************************************************************

 *

 * FUNCTION:    acpi_load_tables
@@ -180,8 +178,16 @@ static acpi_status acpi_tb_load_namespace(void) 
			continue;

		}



		if (no_auto_ssdt) {

			printk(KERN_WARNING "ACPI: SSDT ignored due to \"acpi_no_auto_ssdt\"\n");

		/*

		 * Optionally do not load any SSDTs from the RSDT/XSDT. This can

		 * be useful for debugging ACPI problems on some machines.

		 */

		if (acpi_gbl_disable_ssdt_table_load) {

			ACPI_INFO((AE_INFO, "Ignoring %4.4s at %p",

				   acpi_gbl_root_table_list.tables[i].signature.

				   ascii, ACPI_CAST_PTR(void,

							acpi_gbl_root_table_list.

							tables[i].address)));

			continue;

		}
@@ -376,14 +382,3 @@ acpi_status acpi_unload_parent_table(acpi_handle object) 
}



ACPI_EXPORT_SYMBOL(acpi_unload_parent_table)
 


static int __init acpi_no_auto_ssdt_setup(char *s) {



        printk(KERN_NOTICE "ACPI: SSDT auto-load disabled\n");



        no_auto_ssdt = 1;



        return 1;

}



__setup("acpi_no_auto_ssdt", acpi_no_auto_ssdt_setup);

drivers/acpi/osl.c

+11 −0
Original line number Diff line number Diff line
@@ -1715,6 +1715,17 @@ acpi_status acpi_os_release_object(acpi_cache_t * cache, void *object) 
}

#endif



static int __init acpi_no_auto_ssdt_setup(char *s)

{

        printk(KERN_NOTICE PREFIX "SSDT auto-load disabled\n");



        acpi_gbl_disable_ssdt_table_load = TRUE;



        return 1;

}



__setup("acpi_no_auto_ssdt", acpi_no_auto_ssdt_setup);



acpi_status __init acpi_os_initialize(void)

{

	acpi_os_map_generic_address(&acpi_gbl_FADT.xpm1a_event_block);

include/acpi/acpixf.h

+1 −0
Original line number Diff line number Diff line
@@ -80,6 +80,7 @@ extern bool acpi_gbl_enable_aml_debug_object; 
extern u8 acpi_gbl_copy_dsdt_locally;

extern u8 acpi_gbl_truncate_io_addresses;

extern u8 acpi_gbl_disable_auto_repair;

extern u8 acpi_gbl_disable_ssdt_table_load;



/*

 * Hardware-reduced prototypes. All interfaces that use these macros will

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