xen: add ACPI bus to xen_nexus when running as Dom0

Also disable a couple of ACPI devices that are not usable under Dom0.
To this end a couple of booleans are added that allow disabling ACPI
specific devices.

Sponsored by: Citrix Systems R&D
Reviewed by: jhb

x86/xen/xen_nexus.c:
 - Return BUS_PROBE_SPECIFIC in the Xen Nexus attachement routine to
   force the usage of the Xen Nexus.
 - Attach the ACPI bus when running as Dom0.

dev/acpica/acpi_cpu.c:
dev/acpica/acpi_hpet.c:
dev/acpica/acpi_timer.c
 - Add a variable that gates the addition of the devices.

x86/include/init.h:
 - Declare variables that control the attachment of ACPI cpu, hpet and
   timer devices.

0 files changed, 0 insertions, 0 deletions