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, 11 insertions, 0 deletions

diff --git a/sys/dev/acpica/acpivar.h b/sys/dev/acpica/acpivar.h
index 1bc7ee0..a314098 100644
--- a/sys/dev/acpica/acpivar.h
+++ b/sys/dev/acpica/acpivar.h
@@ -489,5 +489,16 @@ ACPI_HANDLE	acpi_GetReference(ACPI_HANDLE scope, ACPI_OBJECT *obj);
 
 SYSCTL_DECL(_debug_acpi);
 
+/*
+ * Map a PXM to a VM domain.
+ *
+ * Returns the VM domain ID if found, or -1 if not found / invalid.
+ */
+#if MAXMEMDOM > 1
+extern	int acpi_map_pxm_to_vm_domainid(int pxm);
+#endif
+
+extern	int acpi_get_domain(device_t dev, device_t child, int *domain);
+
 #endif /* _KERNEL */
 #endif /* !_ACPIVAR_H_ */