vmm: add pci_segment mmio aperture configs

When using multiple PCI segments, the 32-bit and 64-bit mmio
aperture is split equally between each segment. Add an option
to configure the 'weight'. For example, a PCI segment with a
`mmio32_aperture_weight` of 2 will be allocated twice as much
32-bit mmio space as a normal PCI segment.

Signed-off-by: Thomas Barrett <tbarrett@crusoeenergy.com>

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

@@ -618,6 +618,10 @@ components:
         pvpanic:
           type: boolean
           default: false
+        pci_segments:
+          type: array
+          items:
+            $ref: "#/components/schemas/PciSegmentConfig"
         platform:
           $ref: "#/components/schemas/PlatformConfig"
         tpm:
@@ -683,6 +687,21 @@ components:
         features:
           $ref: "#/components/schemas/CpuFeatures"
 
+    PciSegmentConfig:
+      required:
+        - pci_segment
+      type: object
+      properties:
+        pci_segment:
+          type: integer
+          format: int16
+        mmio32_aperture_weight:
+          type: integer
+          format: int32
+        mmio64_aperture_weight:
+          type: integer
+          format: int32
+
     PlatformConfig:
       type: object
       properties: