Enabling Kernel Direct support for ARM64

Signed-off-by: Manish Ranjan Mahanta <mmahanta@microsoft.com>

Author: Manish Ranjan Mahanta

internal/uvm/create.go

@@ -8,6 +8,7 @@ import (
 	"fmt"
 	"os"
 	"path/filepath"
+	"runtime"
 
 	"github.com/Microsoft/go-winio/pkg/guid"
 	"github.com/sirupsen/logrus"
@@ -194,9 +195,6 @@ func VerifyOptions(_ context.Context, options interface{}) error {
 			if opts.VPMemDeviceCount > 0 {
 				return errors.New("VPMem devices are not supported on ARM64")
 			}
-			if opts.KernelDirect {
-				return errors.New("KernelDirectBoot is not supported on ARM64")
-			}
 		}
 	case *OptionsWCOW:
 		if opts.EnableDeferredCommit && !opts.AllowOvercommit {

internal/uvm/create_lcow.go

@@ -116,6 +116,9 @@ func NewDefaultOptionsLCOW(id, owner string) *OptionsLCOW {
 	kernelDirectSupported := osversion.Build() >= 18286
 	var vPmemCount uint32 = vmutils.DefaultVPMEMCount
 	if runtime.GOARCH == "arm64" {
+		// Todo: Add a conditional check for osversion once KernelDirect
+		// becomes available on ARM64, and enable it for supported versions.
+		// This is used by create-scratch and cannot be overriden by annotations
 		kernelDirectSupported = false
 		vPmemCount = 0
 	}