vmm: Add 'host_numa_nodes' option to memory zones

Since memory zones have been introduced, it is now possible for a user
to specify multiple backends for the guest RAM. By adding a new option
'host_numa_node' to the 'memory-zone' parameter, we allow the guest RAM
to be backed by memory that might come from a specific NUMA node on the
host.

The option expects a node identifier, specifying which NUMA node should
be used to allocate the memory associated with a specific memory zone.

Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>

src/main.rs

@@ -120,7 +120,7 @@ fn create_app<'a, 'b>(
                 .help(
                     "User defined memory zone parameters \
                      \"size=<guest_memory_region_size>,file=<backing_file>,\
-                     shared=on|off,hugepages=on|off\"",
+                     shared=on|off,hugepages=on|off,host_numa_node=<node_id>\"",
                 )
                 .takes_value(true)
                 .min_values(1)