On 22.05.14 20:54:54, Bjorn Helgaas wrote: > I'm going to go out on a limb and guess that Windows does not enable > ECS, so it probably uses ECAM. Therefore, I suspect Linux's parsing > of MCFG is broken in some way, and we probably *could* use ECAM in all > these cases I'm seeing. Even if ECS is not enabled the system should be fine anyway, as ECS is only used to enable certain features. For family 10h this was originally the IBS EILVT (extended interrupt local vector table, needed for hw profiling) setup which need to be set by the OS which the BIOS didn't right. This should be fixed now and properly set by the BIOS on 15h+ systems. I don't remember what was added to 16h where ECS was needed, I think there was one (Suravee?). Not sure if this is essential. So using MCFG should be fine, since if in the rare case when it is broken, the system should work properly anyway without it and only some special features, if any, do not work anymore (e.g. IBS should work fine). -Robert -- 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
