Messages in this thread Patch in this message | | | From | Hanjun Guo <> | Subject | [PATCH v3 1/3] ACPI: ARM64 does not have a BIOS add config for BIOS table scan. | Date | Fri, 18 Jul 2014 18:02:52 +0800 |
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From: Graeme Gregory <graeme.gregory@linaro.org>
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> --- arch/x86/Kconfig | 1 + drivers/acpi/Kconfig | 3 +++ drivers/acpi/osl.c | 4 +++- 3 files changed, 7 insertions(+), 1 deletion(-)
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index a8f749e..6d9f1d8 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -131,6 +131,7 @@ config X86 select HAVE_CC_STACKPROTECTOR select GENERIC_CPU_AUTOPROBE select HAVE_ARCH_AUDITSYSCALL + select ACPI_LEGACY_TABLES_LOOKUP if ACPI config INSTRUCTION_DECODER def_bool y diff --git a/drivers/acpi/Kconfig b/drivers/acpi/Kconfig index a34a228..970524c 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 bad25b0..3abe9b2 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. */ -- 1.7.9.5
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