diff mbox

[Xen-devel,v6,2/3] ACPI: add config for BIOS table scan

Message ID 1454147250-7704-3-git-send-email-zhaoshenglong@huawei.com
State New
Headers show

Commit Message

Shannon Zhao Jan. 30, 2016, 9:47 a.m. UTC 
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>

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

[Linux commit 8a1664be0b922dd6afd60eca96a992ef5ec22c40]
[Include <xen/kconfig.h> in osl.c so that it could use IS_ENABLED]
Signed-off-by: Shannon Zhao <shannon.zhao@linaro.org>

---
 xen/arch/x86/Kconfig     | 1 +
 xen/drivers/acpi/Kconfig | 3 +++
 xen/drivers/acpi/osl.c   | 5 ++++-
 3 files changed, 8 insertions(+), 1 deletion(-)

-- 
2.0.4



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diff mbox

Patch

diff --git a/xen/arch/x86/Kconfig b/xen/arch/x86/Kconfig
index 7d2ed96..9fdd3b1 100644
--- a/xen/arch/x86/Kconfig
+++ b/xen/arch/x86/Kconfig
@@ -3,6 +3,7 @@  config X86_64
 
 config X86
 	def_bool y
+	select ACPI_LEGACY_TABLES_LOOKUP
 	select COMPAT
 	select HAS_ACPI
 	select HAS_CPUFREQ
diff --git a/xen/drivers/acpi/Kconfig b/xen/drivers/acpi/Kconfig
index 11ab5e4..82d73ca 100644
--- a/xen/drivers/acpi/Kconfig
+++ b/xen/drivers/acpi/Kconfig
@@ -2,3 +2,6 @@ 
 # Select HAS_ACPI if ACPI is supported
 config HAS_ACPI
 	bool
+
+config ACPI_LEGACY_TABLES_LOOKUP
+	bool
diff --git a/xen/drivers/acpi/osl.c b/xen/drivers/acpi/osl.c
index ce15470..2f1d723 100644
--- a/xen/drivers/acpi/osl.c
+++ b/xen/drivers/acpi/osl.c
@@ -38,6 +38,7 @@ 
 #include <xen/domain_page.h>
 #include <xen/efi.h>
 #include <xen/vmap.h>
+#include <xen/kconfig.h>
 
 #define _COMPONENT		ACPI_OS_SERVICES
 ACPI_MODULE_NAME("osl")
@@ -75,12 +76,14 @@  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;
 }
 
 void __iomem *