treewide: Consolidate Apple DMI checks
We're about to amend ACPI bus scan with DMI checks whether we're running
on a Mac to support Apple device properties in AML. The DMI checks are
performed for every single device, adding overhead for everything x86
that isn't Apple, which is the majority. Rafael and Andy therefore
request to perform the DMI match only once and cache the result.
Outside of ACPI various other Apple DMI checks exist and it seems
reasonable to use the cached value there as well. Rafael, Andy and
Darren suggest performing the DMI check in arch code and making it
available with a header in include/linux/platform_data/x86/.
To this end, add early_platform_quirks() to arch/x86/kernel/quirks.c
to perform the DMI check and invoke it from setup_arch(). Switch over
all existing Apple DMI checks, thereby fixing two deficiencies:
* They are now #defined to false on non-x86 arches and can thus be
optimized away if they're located in cross-arch code.
* Some of them only match "Apple Inc." but not "Apple Computer, Inc.",
which is used by BIOSes released between January 2006 (when the first
x86 Macs started shipping) and January 2007 (when the company name
changed upon introduction of the iPhone).
Suggested-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Suggested-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Suggested-by: Darren Hart <dvhart@infradead.org>
Signed-off-by: Lukas Wunner <lukas@wunner.de>
Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
diff --git a/drivers/acpi/osi.c b/drivers/acpi/osi.c
index 723bee5..19cdd8a 100644
--- a/drivers/acpi/osi.c
+++ b/drivers/acpi/osi.c
@@ -27,6 +27,7 @@
#include <linux/kernel.h>
#include <linux/acpi.h>
#include <linux/dmi.h>
+#include <linux/platform_data/x86/apple.h>
#include "internal.h"
@@ -257,12 +258,11 @@
}
EXPORT_SYMBOL(acpi_osi_is_win8);
-static void __init acpi_osi_dmi_darwin(bool enable,
- const struct dmi_system_id *d)
+static void __init acpi_osi_dmi_darwin(void)
{
- pr_notice("DMI detected to setup _OSI(\"Darwin\"): %s\n", d->ident);
+ pr_notice("DMI detected to setup _OSI(\"Darwin\"): Apple hardware\n");
osi_config.darwin_dmi = 1;
- __acpi_osi_setup_darwin(enable);
+ __acpi_osi_setup_darwin(true);
}
static void __init acpi_osi_dmi_linux(bool enable,
@@ -273,13 +273,6 @@
__acpi_osi_setup_linux(enable);
}
-static int __init dmi_enable_osi_darwin(const struct dmi_system_id *d)
-{
- acpi_osi_dmi_darwin(true, d);
-
- return 0;
-}
-
static int __init dmi_enable_osi_linux(const struct dmi_system_id *d)
{
acpi_osi_dmi_linux(true, d);
@@ -481,30 +474,16 @@
DMI_MATCH(DMI_PRODUCT_NAME, "1015PX"),
},
},
-
- /*
- * Enable _OSI("Darwin") for all apple platforms.
- */
- {
- .callback = dmi_enable_osi_darwin,
- .ident = "Apple hardware",
- .matches = {
- DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."),
- },
- },
- {
- .callback = dmi_enable_osi_darwin,
- .ident = "Apple hardware",
- .matches = {
- DMI_MATCH(DMI_SYS_VENDOR, "Apple Computer, Inc."),
- },
- },
{}
};
static __init void acpi_osi_dmi_blacklisted(void)
{
dmi_check_system(acpi_osi_dmi_table);
+
+ /* Enable _OSI("Darwin") for Apple platforms. */
+ if (x86_apple_machine)
+ acpi_osi_dmi_darwin();
}
int __init early_acpi_osi_init(void)