Sorry for top-posting. A quick note that SMBIOS3 is required by SBBR so it can be presumed that compliant platforms will provide quirks via DMI. -- Computer Architect | Sent from my 64-bit #ARM Powered phone > On Dec 21, 2015, at 09:11, Arnd Bergmann <arnd@xxxxxxxx> wrote: > > On Monday 21 December 2015, Gabriele Paoloni wrote: >>> -----Original Message----- >>> From: linux-kernel-owner@xxxxxxxxxxxxxxx [mailto:linux-kernel- >>> owner@xxxxxxxxxxxxxxx] On Behalf Of Tomasz Nowicki > >>> Some platforms may not be fully compliant with generic set of PCI >>> config accessors. For these cases we implement the way to overwrite >>> accessors set before PCI buses enumeration. Algorithm that overwrite >>> accessors matches against platform ID (DMI), domain and bus number, >>> hopefully enough for all cases. All quirks can be defined using: >>> DECLARE_ACPI_MCFG_FIXUP() and keep self contained. >> >> I've got a couple of comments/questions about this patch.. >> >> 1) So according to this mechanism quirks would be supported only by >> vendors whose BIOS are SMBIOS compliant. Now personally I am ok >> with this but I don't know if this is OK in general as it would >> narrow down the number of platforms that would be able to define >> the quirks... >> Lorenzo, Arnd what is your opinion here? > > I'd rather not see the quirks in mainline at all, and only support > SBSA compliant machines, or require the BIOS to work around the hardware > quirks differently (e.g. by trapping config space access through secure > firmware, or going through an AML method to be defined). I'm certainly > ok with making it depend on SMBIOS if we are going to use something like this. > > Arnd -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
