On Wed, 25 Jan 2012 14:02:14 -0500 Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx> wrote: > On Wed, Jan 25, 2012 at 06:23:14PM +0100, Guillaume Knispel wrote: > > On Wed, 25 Jan 2012 00:56:53 -0500 > > Len Brown <lenb@xxxxxxxxxx> wrote: > > > > > What is the benefit of implementing ACPI on this custom system? > > > > For our short term project it seems to be more a necessity than a > > benefit. ACPI is supported by the SoC, tables are already largely > > provided by Coreboot, the whole x86 ecosystem including Linux is more > > or less based around ACPI, and my whole interrogation comes from the > > fact that *acpi*_register_gsi() seems to be necessary to configure a > > GSI in the APIC but is not exported anymore, so my guess is that if I > > Hm, isn't it __acpi_register_gsi? __acpi_register_gsi exists on recent kernels, it is the pointer to the underlying implementation of that function depending on the platform (x86 / xen-x86) and on the variant of the platform (pic/apic). acpi_register_gsi still exists and it calls __acpi_register_gsi. > > can't call it explicitly from my LKM, there should better be a way to > > make it be called when an ACPI thing is done, or maybe a legacy table > > parsed. > > Can you do it the way xen does? Look in arch/x86/xen/pci.c Did not found this file. Besides, isn't Xen a separate architecture from mainline x86, compiled built-in? My goal is to only touch LKM and system firmware if necessary. > > As we first target an unmodified (if possible) 2.6.32 kernel from > > Debian Squeeze, I can't just re-export acpi_register_gsi() and call it > > a day. (If I've no other choice I'll obviously do it, but this would be > > quite bad for future maintenance). > > Oh wow. That is ancient. 3.2? 3.2 when a Debian stable will feature 3.2 :) -- Guillaume Knispel Avencall - 10 bis, rue Lucien Voilin - 92800 Puteaux -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
