Report availability of stateless firmware support

This is the first step to support launching instances with stateless
firmware. At this stage none of the virt drivers report the trait to
support the feature.

Depends-on: https://review.opendev.org/c/openstack/os-traits/+/908885
Partially-Implements: blueprint libvirt-stateless-firmware
Change-Id: I4c1df950af11687ae5a52e4eba7943029ec36e69

nova/tests/functional/test_servers_provider_tree.py

@@ -47,6 +47,7 @@ class ProviderTreeTests(integrated_helpers.ProviderUsageBaseTestCase):
             os_traits.COMPUTE_TRUSTED_CERTS,
             os_traits.COMPUTE_ADDRESS_SPACE_EMULATED,
             os_traits.COMPUTE_ADDRESS_SPACE_PASSTHROUGH,
+            os_traits.COMPUTE_SECURITY_STATELESS_FIRMWARE,
         ]
     ])
 

nova/tests/unit/virt/libvirt/test_driver.py

@@ -21829,6 +21829,13 @@ class LibvirtConnTestCase(test.NoDBTestCase,
         self.assertTrue(
             driver.capabilities.get('supports_address_space_emulated'))
 
+    def test_update_host_specific_capabilities_without_stateless_firmware(
+            self):
+        driver = libvirt_driver.LibvirtDriver(fake.FakeVirtAPI())
+        driver._update_host_specific_capabilities()
+        self.assertFalse(
+            driver.capabilities.get('supports_stateless_firmware'))
+
     @mock.patch.object(fakelibvirt.Connection, 'getLibVersion',
                        return_value=versionutils.convert_version_to_int(
                            libvirt_driver.MIN_LIBVIRT_MAXPHYSADDR))

nova/virt/driver.py

@@ -167,6 +167,8 @@ CAPABILITY_TRAITS_MAP = {
         os_traits.COMPUTE_ADDRESS_SPACE_PASSTHROUGH,
     "supports_address_space_emulated":
         os_traits.COMPUTE_ADDRESS_SPACE_EMULATED,
+    "supports_stateless_firmware":
+        os_traits.COMPUTE_SECURITY_STATELESS_FIRMWARE,
 }
 
 

nova/virt/fake.py

@@ -121,6 +121,7 @@ class FakeDriver(driver.ComputeDriver):
         "supports_remote_managed_ports": True,
         "supports_address_space_passthrough": True,
         "supports_address_space_emulated": True,
+        "supports_stateless_firmware": True,
 
         # Supported image types
         "supports_image_type_raw": True,

nova/virt/ironic/driver.py

@@ -163,6 +163,7 @@ class IronicDriver(virt_driver.ComputeDriver):
         "supports_remote_managed_ports": False,
         "supports_address_space_passthrough": False,
         "supports_address_space_emulated": False,
+        "supports_stateless_firmware": False,
 
         # Image type support flags
         "supports_image_type_aki": False,

nova/virt/vmwareapi/driver.py

@@ -74,6 +74,7 @@ class VMwareVCDriver(driver.ComputeDriver):
         "supports_remote_managed_ports": False,
         "supports_address_space_passthrough": False,
         "supports_address_space_emulated": False,
+        "supports_stateless_firmware": False,
 
         # Image type support flags
         "supports_image_type_aki": False,

nova/virt/zvm/driver.py

@@ -49,6 +49,7 @@ class ZVMDriver(driver.ComputeDriver):
         "supports_remote_managed_ports": False,
         "supports_address_space_passthrough": False,
         "supports_address_space_emulated": False,
+        "supports_stateless_firmware": False,
 
         # Image type support flags
         "supports_image_type_aki": False,

requirements.txt

@@ -52,7 +52,7 @@ psutil>=3.2.2 # BSD
 oslo.versionedobjects>=1.35.0 # Apache-2.0
 os-brick>=5.2 # Apache-2.0
 os-resource-classes>=1.1.0 # Apache-2.0
-os-traits>=3.0.0 # Apache-2.0
+os-traits>=3.1.0 # Apache-2.0
 os-vif>=3.1.0 # Apache-2.0
 castellan>=0.16.0 # Apache-2.0
 microversion-parse>=0.2.1 # Apache-2.0