Add support for AMD SEV-SNP instances

fangge1212 · fangge1212 · commit fb66784f2abd · 2025-08-25T04:35:17.000-04:00
This commit adds support for AMD SEV-SNP instances, so users can
utilize confidential computing technology on cluster nodes.

Signed-off-by: Fangge Jin &lt;fjin@redhat.com&gt;
diff --git a/api/v1beta1/awscluster_conversion.go b/api/v1beta1/awscluster_conversion.go
@@ -66,6 +66,7 @@ func (src *AWSCluster) ConvertTo(dstRaw conversion.Hub) error {
 		dst.Status.Bastion.HostAffinity = restored.Status.Bastion.HostAffinity
 		dst.Status.Bastion.HostID = restored.Status.Bastion.HostID
 		dst.Status.Bastion.CapacityReservationPreference = restored.Status.Bastion.CapacityReservationPreference
+		dst.Status.Bastion.CPUOptions = restored.Status.Bastion.CPUOptions
 	}
 	dst.Spec.Partition = restored.Spec.Partition
 
diff --git a/api/v1beta1/awsmachine_conversion.go b/api/v1beta1/awsmachine_conversion.go
@@ -48,6 +48,7 @@ func (src *AWSMachine) ConvertTo(dstRaw conversion.Hub) error {
 	dst.Spec.HostAffinity = restored.Spec.HostAffinity
 	dst.Spec.CapacityReservationPreference = restored.Spec.CapacityReservationPreference
 	dst.Spec.NetworkInterfaceType = restored.Spec.NetworkInterfaceType
+	dst.Spec.CPUOptions = restored.Spec.CPUOptions
 	if restored.Spec.ElasticIPPool != nil {
 		if dst.Spec.ElasticIPPool == nil {
 			dst.Spec.ElasticIPPool = &infrav1.ElasticIPPool{}
@@ -115,6 +116,7 @@ func (r *AWSMachineTemplate) ConvertTo(dstRaw conversion.Hub) error {
 	dst.Spec.Template.Spec.HostAffinity = restored.Spec.Template.Spec.HostAffinity
 	dst.Spec.Template.Spec.CapacityReservationPreference = restored.Spec.Template.Spec.CapacityReservationPreference
 	dst.Spec.Template.Spec.NetworkInterfaceType = restored.Spec.Template.Spec.NetworkInterfaceType
+	dst.Spec.Template.Spec.CPUOptions = restored.Spec.Template.Spec.CPUOptions
 	if restored.Spec.Template.Spec.ElasticIPPool != nil {
 		if dst.Spec.Template.Spec.ElasticIPPool == nil {
 			dst.Spec.Template.Spec.ElasticIPPool = &infrav1.ElasticIPPool{}
diff --git a/api/v1beta1/zz_generated.conversion.go b/api/v1beta1/zz_generated.conversion.go
diff --git a/api/v1beta2/awsmachine_types.go b/api/v1beta2/awsmachine_types.go
@@ -253,6 +253,11 @@ type AWSMachineSpec struct {
 	// +kubebuilder:validation:Enum="";None;CapacityReservationsOnly;Open
 	// +optional
 	CapacityReservationPreference CapacityReservationPreference `json:"capacityReservationPreference,omitempty"`
+
+	// cpuOptions defines CPU-related settings for the instance, including the confidential computing policy.
+	// If unset, no CPU options will be passed to the AWS platform and AWS default CPU options will be applied.
+	// +optional
+	CPUOptions *CPUOptions `json:"cpuOptions,omitempty"`
 }
 
 // CloudInit defines options related to the bootstrapping systems where
diff --git a/api/v1beta2/types.go b/api/v1beta2/types.go
@@ -293,6 +293,9 @@ type Instance struct {
 	// +kubebuilder:validation:Enum="";None;CapacityReservationsOnly;Open
 	// +optional
 	CapacityReservationPreference CapacityReservationPreference `json:"capacityReservationPreference,omitempty"`
+
+	// The cpu options of the instance.
+	CPUOptions *CPUOptions `json:"cpuOptions,omitempty"`
 }
 
 // CapacityReservationPreference describes the preferred use of capacity reservations
@@ -534,3 +537,31 @@ var (
 	// SubnetSchemaPreferPublic allocates more subnets in the VPC to public subnets.
 	SubnetSchemaPreferPublic = SubnetSchemaType("PreferPublic")
 )
+
+// AWSConfidentialComputePolicy represents the confidential compute configuration for the instance.
+type AWSConfidentialComputePolicy string
+
+const (
+	// AWSConfidentialComputePolicyDisabled disables confidential computing for the instance.
+	AWSConfidentialComputePolicyDisabled AWSConfidentialComputePolicy = "Disabled"
+	// AWSConfidentialComputePolicySEVSNP enables AMD SEV-SNP as the confidential computing technology for the instance.
+	AWSConfidentialComputePolicySEVSNP AWSConfidentialComputePolicy = "AMDEncrytedVirtualizationNestedPaging"
+)
+
+// CPUOptions defines CPU-related settings for the instance, including the confidential computing policy.
+type CPUOptions struct {
+	// confidentialCompute specifies whether confidential computing should be enabled for the instance,
+	// and, if so, which confidential computing technology to use.
+	// Valid values are: Disabled, AMDEncrytedVirtualizationNestedPaging
+	// When set to Disabled, confidential computing will be disabled for the instance.
+	// When set to AMDEncrytedVirtualizationNestedPaging, AMD SEV-SNP will be used as the confidential computing technology for the instance.
+	// In this case, ensure the following conditions are met:
+	// 1) The selected instance type supports AMD SEV-SNP.
+	// 2) The selected AWS region supports AMD SEV-SNP.
+	// 3) The selected AMI supports AMD SEV-SNP.
+	// More details can be checked at https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/sev-snp.html
+	// When omitted, this means no opinion and the platform is left to choose a reasonable default, which is subject to change without notice. The current default is Disabled.
+	// +kubebuilder:validation:Enum=Disabled;AMDEncrytedVirtualizationNestedPaging
+	// +optional
+	ConfidentialCompute AWSConfidentialComputePolicy `json:"confidentialCompute,omitempty"`
+}
diff --git a/api/v1beta2/zz_generated.deepcopy.go b/api/v1beta2/zz_generated.deepcopy.go
diff --git a/config/crd/bases/controlplane.cluster.x-k8s.io_awsmanagedcontrolplanes.yaml b/config/crd/bases/controlplane.cluster.x-k8s.io_awsmanagedcontrolplanes.yaml
@@ -1232,6 +1232,27 @@ spec:
                       "None": The instance may not make use of any Capacity Reservations. This is to conserve open reservations for desired workloads
                       "CapacityReservationsOnly": The instance will only run if matched or targeted to a Capacity Reservation
                     type: string
+                  cpuOptions:
+                    description: The cpu options of the instance.
+                    properties:
+                      confidentialCompute:
+                        description: |-
+                          confidentialCompute specifies whether confidential computing should be enabled for the instance,
+                          and, if so, which confidential computing technology to use.
+                          Valid values are: Disabled, AMDEncrytedVirtualizationNestedPaging
+                          When set to Disabled, confidential computing will be disabled for the instance.
+                          When set to AMDEncrytedVirtualizationNestedPaging, AMD SEV-SNP will be used as the confidential computing technology for the instance.
+                          In this case, ensure the following conditions are met:
+                          1) The selected instance type supports AMD SEV-SNP.
+                          2) The selected AWS region supports AMD SEV-SNP.
+                          3) The selected AMI supports AMD SEV-SNP.
+                          More details can be checked at https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/sev-snp.html
+                          When omitted, this means no opinion and the platform is left to choose a reasonable default, which is subject to change without notice. The current default is Disabled.
+                        enum:
+                        - Disabled
+                        - AMDEncrytedVirtualizationNestedPaging
+                        type: string
+                    type: object
                   ebsOptimized:
                     description: Indicates whether the instance is optimized for Amazon
                       EBS I/O.
@@ -3446,6 +3467,27 @@ spec:
                       "None": The instance may not make use of any Capacity Reservations. This is to conserve open reservations for desired workloads
                       "CapacityReservationsOnly": The instance will only run if matched or targeted to a Capacity Reservation
                     type: string
+                  cpuOptions:
+                    description: The cpu options of the instance.
+                    properties:
+                      confidentialCompute:
+                        description: |-
+                          confidentialCompute specifies whether confidential computing should be enabled for the instance,
+                          and, if so, which confidential computing technology to use.
+                          Valid values are: Disabled, AMDEncrytedVirtualizationNestedPaging
+                          When set to Disabled, confidential computing will be disabled for the instance.
+                          When set to AMDEncrytedVirtualizationNestedPaging, AMD SEV-SNP will be used as the confidential computing technology for the instance.
+                          In this case, ensure the following conditions are met:
+                          1) The selected instance type supports AMD SEV-SNP.
+                          2) The selected AWS region supports AMD SEV-SNP.
+                          3) The selected AMI supports AMD SEV-SNP.
+                          More details can be checked at https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/sev-snp.html
+                          When omitted, this means no opinion and the platform is left to choose a reasonable default, which is subject to change without notice. The current default is Disabled.
+                        enum:
+                        - Disabled
+                        - AMDEncrytedVirtualizationNestedPaging
+                        type: string
+                    type: object
                   ebsOptimized:
                     description: Indicates whether the instance is optimized for Amazon
                       EBS I/O.
diff --git a/config/crd/bases/infrastructure.cluster.x-k8s.io_awsclusters.yaml b/config/crd/bases/infrastructure.cluster.x-k8s.io_awsclusters.yaml
@@ -2215,6 +2215,27 @@ spec:
                       "None": The instance may not make use of any Capacity Reservations. This is to conserve open reservations for desired workloads
                       "CapacityReservationsOnly": The instance will only run if matched or targeted to a Capacity Reservation
                     type: string
+                  cpuOptions:
+                    description: The cpu options of the instance.
+                    properties:
+                      confidentialCompute:
+                        description: |-
+                          confidentialCompute specifies whether confidential computing should be enabled for the instance,
+                          and, if so, which confidential computing technology to use.
+                          Valid values are: Disabled, AMDEncrytedVirtualizationNestedPaging
+                          When set to Disabled, confidential computing will be disabled for the instance.
+                          When set to AMDEncrytedVirtualizationNestedPaging, AMD SEV-SNP will be used as the confidential computing technology for the instance.
+                          In this case, ensure the following conditions are met:
+                          1) The selected instance type supports AMD SEV-SNP.
+                          2) The selected AWS region supports AMD SEV-SNP.
+                          3) The selected AMI supports AMD SEV-SNP.
+                          More details can be checked at https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/sev-snp.html
+                          When omitted, this means no opinion and the platform is left to choose a reasonable default, which is subject to change without notice. The current default is Disabled.
+                        enum:
+                        - Disabled
+                        - AMDEncrytedVirtualizationNestedPaging
+                        type: string
+                    type: object
                   ebsOptimized:
                     description: Indicates whether the instance is optimized for Amazon
                       EBS I/O.
diff --git a/config/crd/bases/infrastructure.cluster.x-k8s.io_awsmachines.yaml b/config/crd/bases/infrastructure.cluster.x-k8s.io_awsmachines.yaml
@@ -692,6 +692,29 @@ spec:
                     - ssm-parameter-store
                     type: string
                 type: object
+              cpuOptions:
+                description: |-
+                  cpuOptions defines CPU-related settings for the instance, including the confidential computing policy.
+                  If unset, no CPU options will be passed to the AWS platform and AWS default CPU options will be applied.
+                properties:
+                  confidentialCompute:
+                    description: |-
+                      confidentialCompute specifies whether confidential computing should be enabled for the instance,
+                      and, if so, which confidential computing technology to use.
+                      Valid values are: Disabled, AMDEncrytedVirtualizationNestedPaging
+                      When set to Disabled, confidential computing will be disabled for the instance.
+                      When set to AMDEncrytedVirtualizationNestedPaging, AMD SEV-SNP will be used as the confidential computing technology for the instance.
+                      In this case, ensure the following conditions are met:
+                      1) The selected instance type supports AMD SEV-SNP.
+                      2) The selected AWS region supports AMD SEV-SNP.
+                      3) The selected AMI supports AMD SEV-SNP.
+                      More details can be checked at https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/sev-snp.html
+                      When omitted, this means no opinion and the platform is left to choose a reasonable default, which is subject to change without notice. The current default is Disabled.
+                    enum:
+                    - Disabled
+                    - AMDEncrytedVirtualizationNestedPaging
+                    type: string
+                type: object
               elasticIpPool:
                 description: ElasticIPPool is the configuration to allocate Public
                   IPv4 address (Elastic IP/EIP) from user-defined pool.
diff --git a/config/crd/bases/infrastructure.cluster.x-k8s.io_awsmachinetemplates.yaml b/config/crd/bases/infrastructure.cluster.x-k8s.io_awsmachinetemplates.yaml
@@ -611,6 +611,29 @@ spec:
                             - ssm-parameter-store
                             type: string
                         type: object
+                      cpuOptions:
+                        description: |-
+                          cpuOptions defines CPU-related settings for the instance, including the confidential computing policy.
+                          If unset, no CPU options will be passed to the AWS platform and AWS default CPU options will be applied.
+                        properties:
+                          confidentialCompute:
+                            description: |-
+                              confidentialCompute specifies whether confidential computing should be enabled for the instance,
+                              and, if so, which confidential computing technology to use.
+                              Valid values are: Disabled, AMDEncrytedVirtualizationNestedPaging
+                              When set to Disabled, confidential computing will be disabled for the instance.
+                              When set to AMDEncrytedVirtualizationNestedPaging, AMD SEV-SNP will be used as the confidential computing technology for the instance.
+                              In this case, ensure the following conditions are met:
+                              1) The selected instance type supports AMD SEV-SNP.
+                              2) The selected AWS region supports AMD SEV-SNP.
+                              3) The selected AMI supports AMD SEV-SNP.
+                              More details can be checked at https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/sev-snp.html
+                              When omitted, this means no opinion and the platform is left to choose a reasonable default, which is subject to change without notice. The current default is Disabled.
+                            enum:
+                            - Disabled
+                            - AMDEncrytedVirtualizationNestedPaging
+                            type: string
+                        type: object
                       elasticIpPool:
                         description: ElasticIPPool is the configuration to allocate
                           Public IPv4 address (Elastic IP/EIP) from user-defined pool.
diff --git a/pkg/cloud/services/ec2/instances.go b/pkg/cloud/services/ec2/instances.go
@@ -264,6 +264,8 @@ func (s *Service) CreateInstance(ctx context.Context, scope *scope.MachineScope,
 
 	input.CapacityReservationPreference = scope.AWSMachine.Spec.CapacityReservationPreference
 
+	input.CPUOptions = scope.AWSMachine.Spec.CPUOptions
+
 	s.scope.Debug("Running instance", "machine-role", scope.Role())
 	s.scope.Debug("Running instance with instance metadata options", "metadata options", input.InstanceMetadataOptions)
 	out, err := s.runInstance(scope.Role(), input)
@@ -662,6 +664,7 @@ func (s *Service) runInstance(role string, i *infrav1.Instance) (*infrav1.Instan
 	input.MetadataOptions = getInstanceMetadataOptionsRequest(i.InstanceMetadataOptions)
 	input.PrivateDnsNameOptions = getPrivateDNSNameOptionsRequest(i.PrivateDNSName)
 	input.CapacityReservationSpecification = getCapacityReservationSpecification(i.CapacityReservationID, i.CapacityReservationPreference)
+	input.CpuOptions = getInstanceCPUOptionsRequest(i.CPUOptions)
 
 	if i.Tenancy != "" {
 		input.Placement = &types.Placement{
@@ -1282,3 +1285,24 @@ func getPrivateDNSNameOptionsRequest(privateDNSName *infrav1.PrivateDNSName) *ty
 		HostnameType:                    types.HostnameType(aws.ToString(privateDNSName.HostnameType)),
 	}
 }
+
+func getInstanceCPUOptionsRequest(cpuOptions *infrav1.CPUOptions) *types.CpuOptionsRequest {
+	if cpuOptions == nil {
+		return nil
+	}
+
+	request := &types.CpuOptionsRequest{}
+	switch cpuOptions.ConfidentialCompute {
+	case infrav1.AWSConfidentialComputePolicySEVSNP:
+		request.AmdSevSnp = types.AmdSevSnpSpecificationEnabled
+	case infrav1.AWSConfidentialComputePolicyDisabled:
+		request.AmdSevSnp = types.AmdSevSnpSpecificationDisabled
+	default:
+	}
+
+	if *request == (types.CpuOptionsRequest{}) {
+		return nil
+	}
+
+	return request
+}
diff --git a/pkg/cloud/services/ec2/instances_test.go b/pkg/cloud/services/ec2/instances_test.go

Original file line number	Diff line number	Diff line change
`@@ -66,6 +66,7 @@ func (src *AWSCluster) ConvertTo(dstRaw conversion.Hub) error {`
`66`	`66`	`dst.Status.Bastion.HostAffinity = restored.Status.Bastion.HostAffinity`
`67`	`67`	`dst.Status.Bastion.HostID = restored.Status.Bastion.HostID`
`68`	`68`	`dst.Status.Bastion.CapacityReservationPreference = restored.Status.Bastion.CapacityReservationPreference`
	`69`	`+ dst.Status.Bastion.CPUOptions = restored.Status.Bastion.CPUOptions`
`69`	`70`	`}`
`70`	`71`	`dst.Spec.Partition = restored.Spec.Partition`
`71`	`72`