ACPI: add config for BIOS table scan (8a1664be) · Commits · 戴 / test

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:

Graeme Gregory <graeme.gregory@linaro.org> Signed-off-by:

Hanjun Guo <hanjun.guo@linaro.org> Signed-off-by:

Rafael J. Wysocki <rafael.j.wysocki@intel.com>

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. */

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