On 10/15/2010 01:04 PM, Jesse Barnes wrote: > > So we have a couple of bugs here? > - device reports incorrect range (according to Yinghai this is a > hardware bug) > - BIOS doesn't set the hidden bit to make this BAR invisible > > So rather than applying the quirk which might hide future problems it > seems we should fix the range reporting with a quirk and possibly set > the hidden bit on chipsets that support it (though I'd be happier if I > knew the failure to set it really was a BIOS bug; I guess we won't know > unless we figure out how Windows behaves on these platforms). > There are a couple of problems: a) Linux doesn't handle it correctly when MMCONFIG is a BAR. This is legitimate and in fact explicitly stated as a valid configuration in the PCIe spec; the BAR, of course, has to be configured by BIOS using ports CF8/CFC. b) The BAR is the wrong size (unless it is expected to configure two different domains, or something.) c) Given (b), the BIOS should probably have hidden the BAR as a workaround. -hpa -- 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
