diff --git a/pkg/hostman/isolated_device/gpu.go b/pkg/hostman/isolated_device/gpu.go
index fdf8d2d6b4..da33cda5fa 100644
--- a/pkg/hostman/isolated_device/gpu.go
+++ b/pkg/hostman/isolated_device/gpu.go
@@ -34,6 +34,7 @@ import (
 	"yunion.io/x/onecloud/pkg/util/fileutils2"
 	"yunion.io/x/onecloud/pkg/util/procutils"
 	"yunion.io/x/onecloud/pkg/util/regutils2"
+	"yunion.io/x/onecloud/pkg/util/sysutils"
 )
 
 const (
@@ -174,9 +175,11 @@ func (dev *sGPUBaseDevice) CustomProbe(idx int) error {
 		}
 		grubCmdline = strings.TrimSpace(grubCmdline)
 		params := sets.NewString(strings.Split(grubCmdline, " ")...)
-		if !params.IsSuperset(sets.NewString("intel_iommu=on",
-			"vfio_iommu_type1.allow_unsafe_interrupts=1")) {
-			return fmt.Errorf("Some GRUB_CMDLINE iommu parameters are missing")
+		if !params.IsSuperset(sets.NewString("vfio_iommu_type1.allow_unsafe_interrupts=1")) {
+			return fmt.Errorf("GRUB_CMDLINE iommu parameters vfio_iommu_type1.allow_unsafe_interrupts=1 missing")
+		}
+		if sysutils.IsProcessorIntel() && !params.IsSuperset(sets.NewString("intel_iommu=on")) {
+			return fmt.Errorf("GRUB_CMDLINE iommu parameters intel_iommu=on missing")
 		}
 		isNouveauBlacklisted := false
 		if params.IsSuperset(sets.NewString("rdblacklist=nouveau", "nouveau.modeset=0")) ||
diff --git a/pkg/util/sysutils/kvm.go b/pkg/util/sysutils/kvm.go
index aad853ea7b..1fcc9d198c 100644
--- a/pkg/util/sysutils/kvm.go
+++ b/pkg/util/sysutils/kvm.go
@@ -82,19 +82,31 @@ func isDevKVMExists() bool {
 
 func detectKVMModuleSupport() string {
 	var km = KVM_MODULE_UNSUPPORT
-	if ModprobeKvmModule(KVM_MODULE_INTEL, false, false) {
-		km = KVM_MODULE_INTEL
-	} else if ModprobeKvmModule(KVM_MODULE_AMD, false, false) {
-		km = KVM_MODULE_AMD
-	} else if ModprobeKvmModule(KVM_MODULE, false, false) {
-		if isDevKVMExists() {
+	if isDevKVMExists() {
+		if IsKernelModuleLoaded(KVM_MODULE_INTEL) {
+			km = KVM_MODULE_INTEL
+		} else if IsKernelModuleLoaded(KVM_MODULE_AMD) {
+			km = KVM_MODULE_AMD
+		} else if IsKernelModuleLoaded(KVM_MODULE) {
 			km = KVM_MODULE
-		}
-	}
-	if km == KVM_MODULE_UNSUPPORT {
-		if isDevKVMExists() {
+		} else {
 			km = KVM_MODULE_BUILDIN
 		}
+	} else {
+		if ModprobeKvmModule(KVM_MODULE_INTEL, false, false) {
+			km = KVM_MODULE_INTEL
+		} else if ModprobeKvmModule(KVM_MODULE_AMD, false, false) {
+			km = KVM_MODULE_AMD
+		} else if ModprobeKvmModule(KVM_MODULE, false, false) {
+			if isDevKVMExists() {
+				km = KVM_MODULE
+			}
+		}
+		if km == KVM_MODULE_UNSUPPORT {
+			if isDevKVMExists() {
+				km = KVM_MODULE_BUILDIN
+			}
+		}
 	}
 	return km
 }