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Commit 3e0676a9 authored by Len Brown's avatar Len Brown
Browse files

ACPICA: add debug dump of BIOS _OSI strings 



on boot, print out the OSI strings the BIOS uses to query the OS.

To see this output...

build with CONFIG_ACPI_DEBUG

boot with
"acpi.debug_level=4" (ACPI_LV_INFO) (enabled by default)
and
"acpi.debug_level=1" (ACPI_UTILITIES) (default is 0)

example output:

ACPI: BIOS _OSI(Windows 2001) supported
ACPI: BIOS _OSI(Windows 2001 SP1) supported
ACPI: BIOS _OSI(Windows 2001 SP2) supported
ACPI: BIOS _OSI(Windows 2006) supported
ACPI: BIOS _OSI(Linux) not-supported
ACPI: BIOS _OSI(FreeBSD) not-supported

Signed-off-by: default avatarLen Brown <len.brown@intel.com>
parent 18e352e4

drivers/acpi/acpica/uteval.c

+9 −12
Original line number Diff line number Diff line
@@ -116,9 +116,9 @@ acpi_status acpi_ut_osi_implementation(struct acpi_walk_state *walk_state) 
		return_ACPI_STATUS(AE_NO_MEMORY);

	}



	/* Default return value is SUPPORTED */

	/* Default return value is 0, NOT-SUPPORTED */



	return_desc->integer.value = ACPI_UINT32_MAX;

	return_desc->integer.value = 0;

	walk_state->return_desc = return_desc;



	/* Compare input string to static table of supported interfaces */
@@ -127,10 +127,8 @@ acpi_status acpi_ut_osi_implementation(struct acpi_walk_state *walk_state) 
		if (!ACPI_STRCMP

		    (string_desc->string.pointer,

		     acpi_interfaces_supported[i])) {



			/* The interface is supported */



			return_ACPI_STATUS(AE_OK);

			return_desc->integer.value = ACPI_UINT32_MAX;

			goto done;

		}

	}
@@ -141,15 +139,14 @@ acpi_status acpi_ut_osi_implementation(struct acpi_walk_state *walk_state) 
	 */

	status = acpi_os_validate_interface(string_desc->string.pointer);

	if (ACPI_SUCCESS(status)) {



		/* The interface is supported */



		return_ACPI_STATUS(AE_OK);

		return_desc->integer.value = ACPI_UINT32_MAX;

	}



	/* The interface is not supported */

done:

	ACPI_DEBUG_PRINT_RAW((ACPI_DB_INFO, "ACPI: BIOS _OSI(%s) %ssupported\n",

		string_desc->string.pointer,

		return_desc->integer.value == 0 ? "not-" : ""));



	return_desc->integer.value = 0;

	return_ACPI_STATUS(AE_OK);

}