Add hugepages support

pkg/kubevirt/apis/provider_spec.go

@@ -16,6 +16,7 @@ package api
 
 import (
 	corev1 "k8s.io/api/core/v1"
+	kubevirtv1 "kubevirt.io/client-go/api/v1"
 )
 
 // KubeVirtProviderSpec is the spec to be used while parsing the calls.
@@ -54,6 +55,12 @@ type KubeVirtProviderSpec struct {
 	// Tags is an optional map of tags that is added to the VM as labels.
 	// +optional
 	Tags map[string]string `json:"tags,omitempty"`
+	// MemoryFeatures allows specifying the VirtualMachineInstance memory features like huge pages and guest memory settings.
+	// Each feature might require appropriate FeatureGate enabled.
+	// For hugepages take a look at:
+	// k8s - https://kubernetes.io/docs/tasks/manage-hugepages/scheduling-hugepages/
+	// okd - https://docs.okd.io/3.9/scaling_performance/managing_hugepages.html#huge-pages-prerequisites
+	MemoryFeatures *kubevirtv1.Memory
 }
 
 // NetworkSpec contains information about a network.

pkg/kubevirt/core/core.go

@@ -248,6 +248,12 @@ func (p PluginSPIImpl) CreateMachine(ctx context.Context, machineName string, pr
 		},
 	}
 
+	if providerSpec.MemoryFeatures != nil && providerSpec.MemoryFeatures.Hugepages != nil {
+		virtualMachine.Spec.Template.Spec.Domain.Memory = &kubevirtv1.Memory{
+			Hugepages: providerSpec.MemoryFeatures.Hugepages,
+		}
+	}
+
 	if err := c.Create(ctx, virtualMachine); err != nil {
 		return "", fmt.Errorf("failed to create VirtualMachine: %v", err)
 	}

pkg/kubevirt/validation/validation.go

@@ -71,6 +71,14 @@ func ValidateKubevirtProviderSpecAndSecret(spec *api.KubeVirtProviderSpec, secre
 		}
 	}
 
+	if spec.MemoryFeatures != nil && spec.MemoryFeatures.Hugepages != nil {
+		_, err := resource.ParseQuantity(spec.MemoryFeatures.Hugepages.PageSize)
+		if err != nil {
+			validationErrors = append(validationErrors, fmt.Errorf("invalid value of hugepages size '%v'",
+				spec.MemoryFeatures.Hugepages.PageSize))
+		}
+	}
+
 	validationErrors = append(validationErrors, validateSecrets(secrets)...)
 
 	return validationErrors