Expose new THT params for cpu model flags

This change adds new THT parameters `NovaLibvirtCPUMode`,
`NovaLibvirtCPUModels` and `NovaLibvirtCPUModelExtraFlags`
which allows to configure `libvirt/cpu_mode`, `libvirt/cpu_models`
and `libvirt/cpu_model_extra_flags` parameters respectively.

Change-Id: I8df21d5d171976cbb8670dc5aef744b5fae657b2

deployment/nova/nova-compute-container-puppet.yaml

@@ -458,6 +458,36 @@ parameters:
     type: boolean
     tags:
       - role_specific
+  NovaLibvirtCPUMode:
+    type: string
+    description: >
+      The libvirt CPU mode to configure. Defaults to 'host-model' if virt_type is
+      set to kvm, otherwise defaults to 'none'
+    default: 'none'
+    constraints:
+      - allowed_values:
+        - custom
+        - host-model
+        - none
+        - host-passthrough
+    tags:
+      - role_specific
+  NovaLibvirtCPUModels:
+    type: comma_delimited_list
+    description: >
+      The named libvirt CPU model (see names listed in /usr/share/libvirt/cpu_map.xml).
+      Only has effect if cpu_mode="custom" and virt_type="kvm|qemu"
+    default: []
+    tags:
+      - role_specific
+  NovaLibvirtCPUModelExtraFlags:
+    type: string
+    description: >
+      This allows specifying granular CPU feature flags when specifying CPU models.
+      Only has effect if cpu_mode is not set to 'none'.
+    default: ''
+    tags:
+      - role_specific
 
   # DEPRECATED: the following options are deprecated and are currently maintained
   # for backwards compatibility. They will be removed in future release.
@@ -561,6 +591,9 @@ resources:
               nova::compute::libvirt::swtpm_enabled: NovaEnableVTPM
               nova::compute::vgpu::vgpu_types_device_addresses_mapping: NovaVGPUTypesDeviceAddressesMapping
               compute_disable_irqbalance: NovaComputeDisableIrqBalance
+              nova::compute::libvirt::cpu_mode: NovaLibvirtCPUMode
+              nova::compute::libvirt::cpu_models: NovaLibvirtCPUModels
+              nova::compute::libvirt::cpu_model_extra_flags: NovaLibvirtCPUModelExtraFlags
             - values: {get_param: [RoleParameters]}
           - values:
               NovaVcpuPinSet: {get_param: NovaVcpuPinSet}
@@ -639,6 +672,9 @@ resources:
               NovaImageCacheTTL: {get_param: NovaImageCacheTTL}
               NovaVGPUTypesDeviceAddressesMapping: {get_param: NovaVGPUTypesDeviceAddressesMapping}
               NovaComputeDisableIrqBalance: {get_param: NovaComputeDisableIrqBalance}
+              NovaLibvirtCPUMode: {get_param: NovaLibvirtCPUMode}
+              NovaLibvirtCPUModels: {get_param: NovaLibvirtCPUModels}
+              NovaLibvirtCPUModelExtraFlags: {get_param: NovaLibvirtCPUModelExtraFlags}
 
 
 conditions:

releasenotes/notes/cpu-flags-5b027db3eb2b86c2.yaml

@@ -0,0 +1,7 @@
+---
+features:
+  - |
+    Add parameters `NovaLibvirtCPUMode`, `NovaLibvirtCPUModels`
+    and `NovaLibvirtCPUModelExtraFlags` to allow configuration of
+    CPU related parameters `libvirt/cpu_mode`, `libvirt/cpu_models` and
+    `libvirt/cpu_model_extra_flags` respectively.