C-WCOW: Use existing policy related function

Signed-off-by: Mahati Chamarthy <mahati.chamarthy@gmail.com>

Author: MahatiC

internal/hcsoci/create.go

@@ -265,11 +265,7 @@ func CreateContainer(ctx context.Context, createOptions *CreateOptions) (_ cow.C
 			// v1 Argon or Xenon. Pass the document directly to HCS.
 			hcsDocument = v1
 		} else if coi.HostingSystem != nil {
-			isCWCOWUVM := false
-			if createOptions.HostingSystem.WCOWconfidentialUVMOptions != nil {
-				isCWCOWUVM = true
-			}
-			if isCWCOWUVM {
+			if coi.HostingSystem.HasConfidentialPolicy() {
 				// confidential wcow uvm
 				gcsDocument = &guestresource.CWCOWHostedSystem{
 					Spec: *createOptions.Spec,

internal/uvm/start.go

@@ -337,10 +337,10 @@ func (uvm *UtilityVM) Start(ctx context.Context) (err error) {
 		}
 	}
 
-	if uvm.WCOWconfidentialUVMOptions != nil && uvm.OS() == "windows" {
+	if uvm.HasConfidentialPolicy() && uvm.OS() == "windows" {
 		copts := []WCOWConfidentialUVMOpt{
-			WithWCOWSecurityPolicy(uvm.WCOWconfidentialUVMOptions.WCOWSecurityPolicy),
-			WithWCOWSecurityPolicyEnforcer(uvm.WCOWconfidentialUVMOptions.WCOWSecurityPolicyEnforcer),
+			WithWCOWSecurityPolicy(uvm.createOpts.(OptionsWCOW).SecurityPolicy),
+			WithWCOWSecurityPolicyEnforcer(uvm.createOpts.(OptionsWCOW).SecurityPolicyEnforcer),
 		}
 		if err := uvm.SetWCOWConfidentialUVMOptions(ctx, copts...); err != nil {
 			return err

internal/uvm/types.go

@@ -14,7 +14,6 @@ import (
 	"github.com/Microsoft/hcsshim/hcn"
 	"github.com/Microsoft/hcsshim/internal/gcs"
 	"github.com/Microsoft/hcsshim/internal/hcs"
-	"github.com/Microsoft/hcsshim/internal/protocol/guestresource"
 	"github.com/Microsoft/hcsshim/internal/uvm/scsi"
 )
 
@@ -147,8 +146,6 @@ type UtilityVM struct {
 	// ref counting for block CIMs
 	blockCIMMounts    map[string]*UVMMountedBlockCIMs
 	blockCIMMountLock sync.Mutex
-	// WCOWconfidentialUVMOptions hold confidential UVM specific options
-	WCOWconfidentialUVMOptions *guestresource.WCOWConfidentialOptions
 }
 
 func (uvm *UtilityVM) ScratchEncryptionEnabled() bool {