On Mon, Nov 25, 2013 at 10:43:27AM -0700, Al Stone wrote: > On 11/25/2013 08:30 AM, Matthew Garrett wrote: > >Is ACPI_REDUCED_HARDWARE supposed to indicate support for the reduced > >hardware profile, or that the platform *only* implements the reduced > >hardware profile? > > From what I can see in ACPICA, ACPI_REDUCED_HARDWARE indicates the > platform *only* implements the reduced hardware profile. This *seems* > to be consistent with the specification -- see 3.11.1, second bullet, > for example: Ok, so a kernel built without ACPI_REDUCED_HARDWARE would still support the reduced hardware profile? > ...if by "not supported" one takes that to mean "does not exist when > compiled." I can look at the ACPICA code again, just the same; perhaps > there is some reasonable way to at least select one or the other at boot > as the first step, and then allow switching between modes as a later > step. I don't think you'd ever want to switch after init time. There's a flag in the FADT that indicates whether a system is implementing the reduced hardware profile or not. -- Matthew Garrett | mjg59@xxxxxxxxxxxxx -- 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
