On Wed, Apr 30, 2014 at 3:26 PM, Bjorn Helgaas <bhelgaas@xxxxxxxxxx> wrote: >> For intel: Nehalem, westmere, sndbridge, ivybridge. >> >> For nvidia, only according to boot log for old systems with chipset: >> ck804 and mcp55. > > I meant, do you have a reference to a section in the spec that talks > about how this works? > > So far all we have is folklore that was discovered by experimentation. > It'd be nice to see the spec that says "CC is only used when changing > these listed bits." We will have doc from Intel about that. Hope it is not under NDA. Yinghai -- 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