tree 96ab0d42ae5de697ce9592cc53dc474ecb4ce2af
parent b6ec26fb963133d16acb473bf4fcda09630b2298
author Sudeep Holla <Sudeep.Holla@arm.com> 1455710059 +0000
committer Rafael J. Wysocki <rafael.j.wysocki@intel.com> 1456098836 +0100

ACPI / processor : add support for ACPI0010 processor container

ACPI 6.0 adds support for optional processor container device which may
contain child objects that are either processor devices or other processor
containers. This allows representing hierarchical processor topologies.

It is declared using the _HID of ACPI0010. It is an abstract container
used to represent CPU topology and should not be used to hotplug
purposes.

If no matching handler is found for a device in acpi_scan_attach_handler,
acpi_bus_attach does a default enumeration for those devices with valid
HID in the acpi namespace. This patch adds a scan handler for these ACPI
processor containers to avoid default that enumeration and ensures the
platform devices are not created for them.

Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>