Index: head/sys/amd64/vmm/io/iommu.c
===================================================================
--- head/sys/amd64/vmm/io/iommu.c
+++ head/sys/amd64/vmm/io/iommu.c
@@ -184,7 +184,7 @@
 
 	if (vmm_is_intel())
 		ops = &iommu_ops_intel;
-	else if (vmm_is_amd())
+	else if (vmm_is_svm())
 		ops = &iommu_ops_amd;
 	else
 		ops = NULL;
Index: head/sys/amd64/vmm/vmm.c
===================================================================
--- head/sys/amd64/vmm/vmm.c
+++ head/sys/amd64/vmm/vmm.c
@@ -347,7 +347,7 @@
 	
 	if (vmm_is_intel())
 		ops = &vmm_ops_intel;
-	else if (vmm_is_amd())
+	else if (vmm_is_svm())
 		ops = &vmm_ops_amd;
 	else
 		return (ENXIO);
Index: head/sys/amd64/vmm/vmm_stat.c
===================================================================
--- head/sys/amd64/vmm/vmm_stat.c
+++ head/sys/amd64/vmm/vmm_stat.c
@@ -67,7 +67,7 @@
 	if (vst->scope == VMM_STAT_SCOPE_INTEL && !vmm_is_intel())
 		return;
 
-	if (vst->scope == VMM_STAT_SCOPE_AMD && !vmm_is_amd())
+	if (vst->scope == VMM_STAT_SCOPE_AMD && !vmm_is_svm())
 		return;
 
 	if (vst_num_elems + vst->nelems >= MAX_VMM_STAT_ELEMS) {
Index: head/sys/amd64/vmm/vmm_util.h
===================================================================
--- head/sys/amd64/vmm/vmm_util.h
+++ head/sys/amd64/vmm/vmm_util.h
@@ -34,7 +34,7 @@
 struct trapframe;
 
 bool		vmm_is_intel(void);
-bool		vmm_is_amd(void);
+bool		vmm_is_svm(void);
 bool		vmm_supports_1G_pages(void);
 
 void		dump_trapframe(struct trapframe *tf);
Index: head/sys/amd64/vmm/vmm_util.c
===================================================================
--- head/sys/amd64/vmm/vmm_util.c
+++ head/sys/amd64/vmm/vmm_util.c
@@ -46,9 +46,10 @@
 }
 
 bool
-vmm_is_amd(void)
+vmm_is_svm(void)
 {
-	return (strcmp(cpu_vendor, "AuthenticAMD") == 0);
+	return (strcmp(cpu_vendor, "AuthenticAMD") == 0 ||
+	    strcmp(cpu_vendor, "HygonGenuine") == 0);
 }
 
 bool
Index: head/sys/amd64/vmm/x86.c
===================================================================
--- head/sys/amd64/vmm/x86.c
+++ head/sys/amd64/vmm/x86.c
@@ -135,7 +135,7 @@
 			break;
 		case CPUID_8000_0008:
 			cpuid_count(*eax, *ecx, regs);
-			if (vmm_is_amd()) {
+			if (vmm_is_svm()) {
 				/*
 				 * As on Intel (0000_0007:0, EDX), mask out
 				 * unsupported or unsafe AMD extended features
@@ -234,7 +234,7 @@
 
 		case CPUID_8000_001D:
 			/* AMD Cache topology, like 0000_0004 for Intel. */
-			if (!vmm_is_amd())
+			if (!vmm_is_svm())
 				goto default_leaf;
 
 			/*
@@ -276,8 +276,11 @@
 			break;
 
 		case CPUID_8000_001E:
-			/* AMD Family 16h+ additional identifiers */
-			if (!vmm_is_amd() || CPUID_TO_FAMILY(cpu_id) < 0x16)
+			/*
+			 * AMD Family 16h+ and Hygon Family 18h additional
+			 * identifiers.
+			 */
+			if (!vmm_is_svm() || CPUID_TO_FAMILY(cpu_id) < 0x16)
 				goto default_leaf;
 
 			vm_get_topology(vm, &sockets, &cores, &threads,