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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: 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>
hifive-unleashed-5.1
Graeme Gregory 2014-07-18 18:02:52 +08:00 committed by Rafael J. Wysocki
parent 9a3c4145af
commit 8a1664be0b
3 changed files with 7 additions and 1 deletions
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1
arch/x86/Kconfig
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@ -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

3
drivers/acpi/Kconfig
View File

@ -42,6 +42,9 @@ menuconfig ACPI
if ACPI
config ACPI_LEGACY_TABLES_LOOKUP
bool
config ACPI_SLEEP
bool
depends on SUSPEND || HIBERNATION

4
drivers/acpi/osl.c
View File

@ -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. */