vmm: Add device_id field to NUMA configuration

Add an optional device_id string field to NumaConfig for identifying
PCI devices associated with a NUMA node. This is used by the Generic
Initiator support to map devices to their proximity domain.

Update OpenAPI spec (cloud-hypervisor.yaml) to include the
new device_id field in the NumaConfig schema.

The device_id is optional and parsed from the --numa parameter:
  --numa "device_id=<device_id>,distances=[...],..."

The optional field is accepted but not used.

Signed-off-by: Saravanan D <saravanand@crusoe.ai>

arch/src/lib.rs

@@ -120,6 +120,7 @@ pub struct NumaNode {
     pub pci_segments: Vec<u16>,
     pub distances: BTreeMap<u32, u8>,
     pub memory_zones: Vec<String>,
+    pub device_id: Option<String>,
 }
 
 pub type NumaNodes = BTreeMap<u32, NumaNode>;

vmm/src/api/openapi/cloud-hypervisor.yaml

@@ -1203,6 +1203,8 @@ components:
           items:
             type: integer
             format: int32
+        device_id:
+          type: string
 
     VmResize:
       type: object

vmm/src/config.rs

@@ -2185,6 +2185,7 @@ impl VsockConfig {
 impl NumaConfig {
     pub const SYNTAX: &'static str = "Settings related to a given NUMA node \
         \"guest_numa_id=<node_id>,cpus=<cpus_id>,distances=<list_of_distances_to_destination_nodes>,\
+        device_id=<device_id>,\
         memory_zones=<list_of_memory_zones>,\
         pci_segments=<list_of_pci_segments>\"";
 
@@ -2194,6 +2195,7 @@ impl NumaConfig {
             .add("guest_numa_id")
             .add("cpus")
             .add("distances")
+            .add("device_id")
             .add("memory_zones")
             .add("pci_segments");
 
@@ -2222,6 +2224,7 @@ impl NumaConfig {
                     })
                     .collect()
             });
+        let device_id = parser.get("device_id");
         let memory_zones = parser
             .convert::<StringList>("memory_zones")
             .map_err(Error::ParseNuma)?
@@ -2234,6 +2237,7 @@ impl NumaConfig {
             guest_numa_id,
             cpus,
             distances,
+            device_id,
             memory_zones,
             pci_segments,
         })
@@ -4118,6 +4122,7 @@ mod unit_tests {
             guest_numa_id: 0,
             cpus: None,
             distances: None,
+            device_id: None,
             memory_zones: None,
             pci_segments: None,
         }

vmm/src/vm_config.rs

@@ -685,6 +685,8 @@ pub struct NumaConfig {
     pub memory_zones: Option<Vec<String>>,
     #[serde(default)]
     pub pci_segments: Option<Vec<u16>>,
+    #[serde(default)]
+    pub device_id: Option<String>,
 }
 
 /// Errors describing a misconfigured payload, i.e., a configuration that