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Commit 8a1664be authored by Graeme Gregory's avatar Graeme Gregory Committed by Rafael J. Wysocki
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ACPI: add config for BIOS table scan 



With the addition of ARM64 that does not have a traditional BIOS to
scan, add a config option which is selected on x86 (ia64 doesn't need
it either, it is EFI/UEFI based system) to do the traditional BIOS
scanning for tables.

Signed-off-by: default avatarGraeme Gregory <graeme.gregory@linaro.org>
Signed-off-by: default avatarHanjun Guo <hanjun.guo@linaro.org>
Signed-off-by: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
parent 9a3c4145

arch/x86/Kconfig

+1 −0
Original line number Diff line number Diff line
@@ -132,6 +132,7 @@ config X86 
	select GENERIC_CPU_AUTOPROBE

	select HAVE_ARCH_AUDITSYSCALL

	select ARCH_SUPPORTS_ATOMIC_RMW

	select ACPI_LEGACY_TABLES_LOOKUP if ACPI



config INSTRUCTION_DECODER

	def_bool y

drivers/acpi/Kconfig

+3 −0
Original line number Diff line number Diff line
@@ -42,6 +42,9 @@ menuconfig ACPI 


if ACPI



config ACPI_LEGACY_TABLES_LOOKUP

	bool



config ACPI_SLEEP

	bool

	depends on SUSPEND || HIBERNATION

drivers/acpi/osl.c

+3 −1
Original line number Diff line number Diff line
@@ -259,12 +259,14 @@ acpi_physical_address __init acpi_os_get_root_pointer(void) 
			       "System description tables not found\n");

			return 0;

		}

	} else {

	} else if (IS_ENABLED(CONFIG_ACPI_LEGACY_TABLES_LOOKUP)) {

		acpi_physical_address pa = 0;



		acpi_find_root_pointer(&pa);

		return pa;

	}



	return 0;

}



/* Must be called with 'acpi_ioremap_lock' or RCU read lock held. */