docs: Update swagger.yml with huge_pages field

Add the huge_pages field to the /machine-config documentation.

Signed-off-by: Patrick Roy <[email protected]>

Author: roypat

src/firecracker/swagger/firecracker.yaml

@@ -331,9 +331,10 @@ paths:
         The vCPU count is restricted to the [1, 32] range.
         With SMT enabled, the vCPU count is required to be either 1 or an even number in the range.
         otherwise there are no restrictions regarding the vCPU count.
+        If 2M hugetlbfs pages are specified, then `mem_size_mib` must be a multiple of 2.
         If any of the parameters has an incorrect value, the whole update fails.
         All parameters that are optional and are not specified are set to their default values
-        (smt = false, track_dirty_pages = false, cpu_template = None).
+        (smt = false, track_dirty_pages = false, cpu_template = None, huge_pages = None).
       operationId: putMachineConfiguration
       parameters:
         - name: body
@@ -1015,7 +1016,7 @@ definitions:
   MachineConfiguration:
     type: object
     description:
-      Describes the number of vCPUs, memory size, SMT capabilities and
+      Describes the number of vCPUs, memory size, SMT capabilities, huge page configuration and
       the CPU template.
     required:
       - mem_size_mib
@@ -1043,6 +1044,12 @@ definitions:
         minimum: 1
         maximum: 32
         description: Number of vCPUs (either 1 or an even number)
+      huge_pages:
+        type: string
+        enum:
+          - None
+          - 2M
+        description: Which huge pages configuration (if any) should be used to back guest memory.
 
   MemoryBackend:
     type: object