On 11/3/2016 12:58 PM, Sinan Kaya wrote: >> > This is the crucial point I have failed to communicate clearly: the >> > PNP0C02 resource is *always* required, even if the MCFG is correct. >> > > Interesting... > > It looks like there is a lot of lessons learnt here from history. > > I think this requirement is only true if your system DDR space and PCIe > space overlaps in the memory map. I understand that Intel systems allow > sharing of these two memory ranges. An OS could potentially reclaim this > address range. > > If there is no overlap and PCI is not enabled, there can't be any SW entity > to reclaim this space. > > Did I miss something? > For protection, it makes sense to reserve this range. I'm trying to understand who would claim this range. -- Sinan Kaya Qualcomm Datacenter Technologies, Inc. as an affiliate of Qualcomm Technologies, Inc. Qualcomm Technologies, Inc. is a member of the Code Aurora Forum, a Linux Foundation Collaborative Project. -- 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
