On Tue, Aug 01, 2017 at 02:10:41PM +0200, Lukas Wunner wrote: > 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). > > Cc: Lv Zheng <[email protected]> > Cc: Ingo Molnar <[email protected]> > Cc: H. Peter Anvin <[email protected]> > Cc: Thomas Gleixner <[email protected]> > Cc: Bjorn Helgaas <[email protected]> > Cc: Matt Fleming <[email protected]> > Cc: Ard Biesheuvel <[email protected]> > Cc: Andreas Noever <[email protected]> > Cc: Michael Jamet <[email protected]> > Cc: Yehezkel Bernat <[email protected]> > Cc: Mika Westerberg <[email protected]>
For the thunderbolt bits: Acked-by: Mika Westerberg <[email protected]>
