Adding hugepage and NUMA support check for aarch64

Nova ignores aarch64 while verifying for hugepage and NUMA support.
AARCH64 also supports hugepage and NUMA on the same libvirt versions as of x86.
Hence adding this chek for aarch64 also.

Change-Id: I7b5ae1dbdca4fdd0aee2eefd4099c4c4953b609a
Closes-bug: #1623871

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

@@ -2910,7 +2910,8 @@ class LibvirtConnTestCase(test.NoDBTestCase):
                        return_value=True)
     @mock.patch.object(host.Host, "get_capabilities")
     def test_does_want_hugepages(self, mock_caps, mock_hp, mock_numa):
-        for each_arch in [arch.I686, arch.X86_64, arch.PPC64LE, arch.PPC64]:
+        for each_arch in [arch.I686, arch.X86_64, arch.PPC64LE, arch.PPC64,
+                          arch.AARCH64]:
             self._test_does_want_hugepages(
                 mock_caps, mock_hp, mock_numa, each_arch)
 

nova/virt/libvirt/driver.py

@@ -5108,7 +5108,8 @@ class LibvirtDriver(driver.ComputeDriver):
                     self._bad_libvirt_numa_version_warn = True
                 return False
 
-        support_matrix = {(arch.I686, arch.X86_64): MIN_LIBVIRT_NUMA_VERSION,
+        support_matrix = {(arch.I686, arch.X86_64,
+                           arch.AARCH64): MIN_LIBVIRT_NUMA_VERSION,
                           (arch.PPC64,
                            arch.PPC64LE): MIN_LIBVIRT_NUMA_VERSION_PPC}
         caps = self._host.get_capabilities()
@@ -5124,7 +5125,8 @@ class LibvirtDriver(driver.ComputeDriver):
     def _has_hugepage_support(self):
         # This means that the host can support multiple values for the size
         # field in LibvirtConfigGuestMemoryBackingPage
-        supported_archs = [arch.I686, arch.X86_64, arch.PPC64LE, arch.PPC64]
+        supported_archs = [arch.I686, arch.X86_64, arch.PPC64LE, arch.PPC64,
+                           arch.AARCH64]
         caps = self._host.get_capabilities()
         return ((caps.host.cpu.arch in supported_archs) and
                 self._host.has_min_version(MIN_LIBVIRT_HUGEPAGE_VERSION,

releasenotes/notes/add-numa-hugepage-support-for-aarch64-14279c307e44b147.yaml

@@ -0,0 +1,4 @@
+---
+features:
+  - Adding aarch64 to the list of supported architectures for NUMA and hugepage features.
+    This requires libvirt>=1.2.7 for NUMA, libvirt>=1.2.8 for hugepage and qemu v2.1.0 for both.