Commit 8a1664be authored by Graeme Gregory's avatar Graeme Gregory Committed by Rafael J. Wysocki

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