diff --git a/xen/arch/x86/hvm/hvm.c b/xen/arch/x86/hvm/hvm.c
index e8deeb0222..ae9d4c4756 100644
--- a/xen/arch/x86/hvm/hvm.c
+++ b/xen/arch/x86/hvm/hvm.c
@@ -174,17 +174,17 @@ static int __init cf_check hvm_enable(void)
     {
         printk("HVM: Hardware Assisted Paging (HAP) detected\n");
         printk("HVM: HAP page sizes: 4kB");
-        if ( fns->hap_capabilities & HVM_HAP_SUPERPAGE_2MB )
+        if ( fns->caps.hap_superpage_2mb )
         {
             printk(", 2MB%s", opt_hap_2mb ? "" : " [disabled]");
             if ( !opt_hap_2mb )
-                hvm_funcs.hap_capabilities &= ~HVM_HAP_SUPERPAGE_2MB;
+                hvm_funcs.caps.hap_superpage_2mb = false;
         }
-        if ( fns->hap_capabilities & HVM_HAP_SUPERPAGE_1GB )
+        if ( fns->caps.hap_superpage_1gb )
         {
             printk(", 1GB%s", opt_hap_1gb ? "" : " [disabled]");
             if ( !opt_hap_1gb )
-                hvm_funcs.hap_capabilities &= ~HVM_HAP_SUPERPAGE_1GB;
+                hvm_funcs.caps.hap_superpage_1gb = false;
         }
         printk("\n");
     }
diff --git a/xen/arch/x86/hvm/svm/svm.c b/xen/arch/x86/hvm/svm/svm.c
index 65f437e958..5741287355 100644
--- a/xen/arch/x86/hvm/svm/svm.c
+++ b/xen/arch/x86/hvm/svm/svm.c
@@ -2581,8 +2581,8 @@ const struct hvm_function_table * __init start_svm(void)
         printk(" - none\n");
 
     svm_function_table.hap_supported = !!cpu_has_svm_npt;
-    svm_function_table.hap_capabilities = HVM_HAP_SUPERPAGE_2MB |
-        (cpu_has_page1gb ? HVM_HAP_SUPERPAGE_1GB : 0);
+    svm_function_table.caps.hap_superpage_2mb = true;
+    svm_function_table.caps.hap_superpage_1gb = cpu_has_page1gb;
 
     return &svm_function_table;
 }
diff --git a/xen/arch/x86/hvm/vmx/vmcs.c b/xen/arch/x86/hvm/vmx/vmcs.c
index 4fe1213855..53f9d81aa9 100644
--- a/xen/arch/x86/hvm/vmx/vmcs.c
+++ b/xen/arch/x86/hvm/vmx/vmcs.c
@@ -113,8 +113,8 @@ static int cf_check parse_ept_param_runtime(const char *s)
     int val;
 
     if ( !cpu_has_vmx_ept || !hvm_funcs.hap_supported ||
-         !(hvm_funcs.hap_capabilities &
-           (HVM_HAP_SUPERPAGE_2MB | HVM_HAP_SUPERPAGE_1GB)) )
+         !(hvm_funcs.caps.hap_superpage_2mb ||
+           hvm_funcs.caps.hap_superpage_1gb) )
     {
         printk("VMX: EPT not available, or not in use - ignoring\n");
         return 0;
diff --git a/xen/arch/x86/hvm/vmx/vmx.c b/xen/arch/x86/hvm/vmx/vmx.c
index 1500dca603..9cfc0140b4 100644
--- a/xen/arch/x86/hvm/vmx/vmx.c
+++ b/xen/arch/x86/hvm/vmx/vmx.c
@@ -2989,12 +2989,8 @@ const struct hvm_function_table * __init start_vmx(void)
         vmx_function_table.hap_supported = 1;
         vmx_function_table.altp2m_supported = 1;
 
-        vmx_function_table.hap_capabilities = 0;
-
-        if ( cpu_has_vmx_ept_2mb )
-            vmx_function_table.hap_capabilities |= HVM_HAP_SUPERPAGE_2MB;
-        if ( cpu_has_vmx_ept_1gb )
-            vmx_function_table.hap_capabilities |= HVM_HAP_SUPERPAGE_1GB;
+        vmx_function_table.caps.hap_superpage_2mb = cpu_has_vmx_ept_2mb;
+        vmx_function_table.caps.hap_superpage_1gb = cpu_has_vmx_ept_1gb;
 
         setup_ept_dump();
     }
diff --git a/xen/arch/x86/include/asm/hvm/hvm.h b/xen/arch/x86/include/asm/hvm/hvm.h
index 985c1c14c6..f50476f50f 100644
--- a/xen/arch/x86/include/asm/hvm/hvm.h
+++ b/xen/arch/x86/include/asm/hvm/hvm.h
@@ -61,14 +61,6 @@ enum hvm_intblk {
 #define HVM_INTR_SHADOW_SMI    0x00000004
 #define HVM_INTR_SHADOW_NMI    0x00000008
 
-/*
- * HAP super page capabilities:
- * bit0: if 2MB super page is allowed?
- * bit1: if 1GB super page is allowed?
- */
-#define HVM_HAP_SUPERPAGE_2MB   0x00000001
-#define HVM_HAP_SUPERPAGE_1GB   0x00000002
-
 #define HVM_EVENT_VECTOR_UNSET    (-1)
 #define HVM_EVENT_VECTOR_UPDATING (-2)
 
@@ -104,8 +96,11 @@ struct hvm_function_table {
     /* Hardware virtual interrupt delivery enable? */
     bool virtual_intr_delivery_enabled;
 
-    /* Indicate HAP capabilities. */
-    unsigned int hap_capabilities;
+    struct {
+        /* Indicate HAP capabilities. */
+        bool hap_superpage_1gb:1,
+            hap_superpage_2mb:1;
+    } caps;
 
     /*
      * Initialise/destroy HVM domain/vcpu resources
@@ -402,8 +397,8 @@ int hvm_get_param(struct domain *d, uint32_t index, uint64_t *value);
     (hvm_paging_enabled(v) && ((v)->arch.hvm.guest_cr[4] & X86_CR4_PKS))
 
 /* Can we use superpages in the HAP p2m table? */
-#define hap_has_1gb (!!(hvm_funcs.hap_capabilities & HVM_HAP_SUPERPAGE_1GB))
-#define hap_has_2mb (!!(hvm_funcs.hap_capabilities & HVM_HAP_SUPERPAGE_2MB))
+#define hap_has_1gb hvm_funcs.caps.hap_superpage_1gb
+#define hap_has_2mb hvm_funcs.caps.hap_superpage_2mb
 
 #define hvm_long_mode_active(v) (!!((v)->arch.hvm.guest_efer & EFER_LMA))
 
