Add a bus method to fetch the VM domain for the given device/bus.

* Add a bus_if.m method - get_domain() - returning the VM domain or
  ENOENT if the device isn't in a VM domain;
* Add bus methods to print out the domain of the device if appropriate;
* Add code in srat.c to save the PXM -> VM domain mapping that's done and
  expose a function to translate VM domain -> PXM;
* Add ACPI and ACPI PCI methods to check if the bus has a _PXM attribute
  and if so map it to the VM domain;
* (.. yes, this works recursively.)
* Have the pci bus glue print out the device VM domain if present.

Note: this is just the plumbing to start enumerating information -
it doesn't at all modify behaviour.

Differential Revision:	D906
Reviewed by:	jhb
Sponsored by:	Norse Corp

1 files changed, 3 insertions, 0 deletions

diff --git a/sys/sys/bus.h b/sys/sys/bus.h
index f457905..7a2e56b5 100644
--- a/sys/sys/bus.h
+++ b/sys/sys/bus.h
@@ -331,6 +331,7 @@ struct resource_list *
 	bus_generic_get_resource_list (device_t, device_t);
 void	bus_generic_new_pass(device_t dev);
 int	bus_print_child_header(device_t dev, device_t child);
+int	bus_print_child_domain(device_t dev, device_t child);
 int	bus_print_child_footer(device_t dev, device_t child);
 int	bus_generic_print_child(device_t dev, device_t child);
 int	bus_generic_probe(device_t dev);
@@ -364,6 +365,8 @@ int	bus_generic_teardown_intr(device_t dev, device_t child,
 int	bus_generic_write_ivar(device_t dev, device_t child, int which,
 			       uintptr_t value);
 
+int	bus_generic_get_domain(device_t dev, device_t child, int *domain);
+
 /*
  * Wrapper functions for the BUS_*_RESOURCE methods to make client code
  * a little simpler.