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| author | Graeme Gregory <graeme.gregory@linaro.org> | 2014-07-18 14:02:52 +0400 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2014-07-21 15:50:58 +0400 |
| commit | 8a1664be0b922dd6afd60eca96a992ef5ec22c40 (patch) | |
| tree | 3183bc4dad47bb9407236697dee8526455878e0b | |
| parent | 9a3c4145af32125c5ee39c0272662b47307a8323 (diff) | |
| download | linux-8a1664be0b922dd6afd60eca96a992ef5ec22c40.tar.xz | |
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>
| -rw-r--r-- | arch/x86/Kconfig | 1 | ||||
| -rw-r--r-- | drivers/acpi/Kconfig | 3 | ||||
| -rw-r--r-- | drivers/acpi/osl.c | 4 |
3 files changed, 7 insertions, 1 deletions
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index d24887b645dc..5617750262db 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -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 diff --git a/drivers/acpi/Kconfig b/drivers/acpi/Kconfig index a34a22841002..970524c54bfa 100644 --- a/drivers/acpi/Kconfig +++ b/drivers/acpi/Kconfig @@ -42,6 +42,9 @@ menuconfig ACPI if ACPI +config ACPI_LEGACY_TABLES_LOOKUP + bool + config ACPI_SLEEP bool depends on SUSPEND || HIBERNATION diff --git a/drivers/acpi/osl.c b/drivers/acpi/osl.c index bad25b070fe0..3abe9b223ba7 100644 --- a/drivers/acpi/osl.c +++ b/drivers/acpi/osl.c @@ -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. */ |