On Wednesday 18 November 2009 01:40:57 pm Rocky Craig wrote: > Bjorn Helgaas emitted: > > > Anything described by the SPMI should also be described in the namespace. > > I believe that distinction/request/requirement was lost "back in the day". I disagree that this requirement was lost. The ACPI spec is regrettably vague, but I think it still contains the very general requirement that the ACPI namespace should describe everything that cannot be found by a standard hardware enumeration mechanism. That requirement allows the OS to use a single coherent device discovery, driver binding, and resource management scheme to cover all these devices. If we had to deal with all these devices piece- meal, with an SPMI table here, an SPCR table there, we'd go more mad than we already are. There may be firmware that has an SPMI but neglects to put the device in the namespace. In my opinion, that's clearly a defect. I think it's unlikely since Windows relies on the namespace, but it's certainly a risk. Bjorn -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
