diff --git a/hw/usb/hcd-xhci-sysbus.h b/hw/usb/hcd-xhci-sysbus.h
index a308753ceb9b..fdfcbbee3bf4 100644
--- a/hw/usb/hcd-xhci-sysbus.h
+++ b/hw/usb/hcd-xhci-sysbus.h
@@ -15,7 +15,6 @@
 #include "hcd-xhci.h"
 #include "hw/sysbus.h"
 
-#define TYPE_XHCI_SYSBUS "sysbus-xhci"
 #define XHCI_SYSBUS(obj) \
     OBJECT_CHECK(XHCISysbusState, (obj), TYPE_XHCI_SYSBUS)
 
diff --git a/hw/usb/hcd-xhci.h b/hw/usb/hcd-xhci.h
index f859a17e73ee..ccf50ae28bed 100644
--- a/hw/usb/hcd-xhci.h
+++ b/hw/usb/hcd-xhci.h
@@ -24,23 +24,13 @@
 #include "qom/object.h"
 
 #include "hw/usb.h"
+#include "hw/usb/xhci.h"
 #include "sysemu/dma.h"
 
-#define TYPE_XHCI "base-xhci"
-#define TYPE_NEC_XHCI "nec-usb-xhci"
-#define TYPE_QEMU_XHCI "qemu-xhci"
-
 OBJECT_DECLARE_SIMPLE_TYPE(XHCIState, XHCI)
 
-#define MAXPORTS_2 15
-#define MAXPORTS_3 15
-
-#define MAXPORTS (MAXPORTS_2 + MAXPORTS_3)
-#define MAXSLOTS 64
-#define MAXINTRS 16
-
 /* Very pessimistic, let's hope it's enough for all cases */
-#define EV_QUEUE (((3 * 24) + 16) * MAXSLOTS)
+#define EV_QUEUE (((3 * 24) + 16) * XHCI_MAXSLOTS)
 
 typedef struct XHCIStreamContext XHCIStreamContext;
 typedef struct XHCIEPContext XHCIEPContext;
@@ -217,15 +207,15 @@ typedef struct XHCIState {
     uint32_t dcbaap_high;
     uint32_t config;
 
-    USBPort  uports[MAX_CONST(MAXPORTS_2, MAXPORTS_3)];
-    XHCIPort ports[MAXPORTS];
-    XHCISlot slots[MAXSLOTS];
+    USBPort  uports[MAX_CONST(XHCI_MAXPORTS_2, XHCI_MAXPORTS_3)];
+    XHCIPort ports[XHCI_MAXPORTS];
+    XHCISlot slots[XHCI_MAXSLOTS];
     uint32_t numports;
 
     /* Runtime Registers */
     int64_t mfindex_start;
     QEMUTimer *mfwrap_timer;
-    XHCIInterrupter intr[MAXINTRS];
+    XHCIInterrupter intr[XHCI_MAXINTRS];
 
     XHCIRing cmd_ring;
 
diff --git a/include/hw/usb/xhci.h b/include/hw/usb/xhci.h
new file mode 100644
index 000000000000..dc0c29930dcc
--- /dev/null
+++ b/include/hw/usb/xhci.h
@@ -0,0 +1,19 @@
+#ifndef HW_USB_XHCI_H
+#define HW_USB_XHCI_H
+
+#define TYPE_XHCI "base-xhci"
+#define TYPE_NEC_XHCI "nec-usb-xhci"
+#define TYPE_QEMU_XHCI "qemu-xhci"
+#define TYPE_XHCI_SYSBUS "sysbus-xhci"
+
+#define XHCI_MAXPORTS_2 15
+#define XHCI_MAXPORTS_3 15
+
+#define XHCI_MAXPORTS (XHCI_MAXPORTS_2 + XHCI_MAXPORTS_3)
+#define XHCI_MAXSLOTS 64
+#define XHCI_MAXINTRS 16
+
+/* must be power of 2 */
+#define XHCI_LEN_REGS 0x4000
+
+#endif
diff --git a/hw/usb/hcd-xhci-nec.c b/hw/usb/hcd-xhci-nec.c
index 2efa6fa0f8af..5707b2cabd16 100644
--- a/hw/usb/hcd-xhci-nec.c
+++ b/hw/usb/hcd-xhci-nec.c
@@ -34,8 +34,8 @@ static Property nec_xhci_properties[] = {
                     xhci.flags, XHCI_FLAG_SS_FIRST, true),
     DEFINE_PROP_BIT("force-pcie-endcap", XHCIPciState, xhci.flags,
                     XHCI_FLAG_FORCE_PCIE_ENDCAP, false),
-    DEFINE_PROP_UINT32("intrs", XHCIPciState, xhci.numintrs, MAXINTRS),
-    DEFINE_PROP_UINT32("slots", XHCIPciState, xhci.numslots, MAXSLOTS),
+    DEFINE_PROP_UINT32("intrs", XHCIPciState, xhci.numintrs, XHCI_MAXINTRS),
+    DEFINE_PROP_UINT32("slots", XHCIPciState, xhci.numslots, XHCI_MAXSLOTS),
     DEFINE_PROP_END_OF_LIST(),
 };
 
diff --git a/hw/usb/hcd-xhci-pci.c b/hw/usb/hcd-xhci-pci.c
index a6d746e1da38..b78fcd2bb2d5 100644
--- a/hw/usb/hcd-xhci-pci.c
+++ b/hw/usb/hcd-xhci-pci.c
@@ -240,8 +240,8 @@ static void qemu_xhci_instance_init(Object *obj)
 
     s->msi      = ON_OFF_AUTO_OFF;
     s->msix     = ON_OFF_AUTO_AUTO;
-    xhci->numintrs = MAXINTRS;
-    xhci->numslots = MAXSLOTS;
+    xhci->numintrs = XHCI_MAXINTRS;
+    xhci->numslots = XHCI_MAXSLOTS;
     xhci_set_flag(xhci, XHCI_FLAG_SS_FIRST);
 }
 
diff --git a/hw/usb/hcd-xhci-sysbus.c b/hw/usb/hcd-xhci-sysbus.c
index 852ca5103b4d..570618467356 100644
--- a/hw/usb/hcd-xhci-sysbus.c
+++ b/hw/usb/hcd-xhci-sysbus.c
@@ -69,8 +69,8 @@ static void xhci_sysbus_instance_init(Object *obj)
 }
 
 static Property xhci_sysbus_props[] = {
-    DEFINE_PROP_UINT32("intrs", XHCISysbusState, xhci.numintrs, MAXINTRS),
-    DEFINE_PROP_UINT32("slots", XHCISysbusState, xhci.numslots, MAXSLOTS),
+    DEFINE_PROP_UINT32("intrs", XHCISysbusState, xhci.numintrs, XHCI_MAXINTRS),
+    DEFINE_PROP_UINT32("slots", XHCISysbusState, xhci.numslots, XHCI_MAXSLOTS),
     DEFINE_PROP_END_OF_LIST(),
 };
 
diff --git a/hw/usb/hcd-xhci.c b/hw/usb/hcd-xhci.c
index 5e8bed9ef90c..79ce5c4be6c4 100644
--- a/hw/usb/hcd-xhci.c
+++ b/hw/usb/hcd-xhci.c
@@ -46,15 +46,13 @@
 #define TRANSFER_LIMIT  256
 
 #define LEN_CAP         0x40
-#define LEN_OPER        (0x400 + 0x10 * MAXPORTS)
-#define LEN_RUNTIME     ((MAXINTRS + 1) * 0x20)
-#define LEN_DOORBELL    ((MAXSLOTS + 1) * 0x20)
+#define LEN_OPER        (0x400 + 0x10 * XHCI_MAXPORTS)
+#define LEN_RUNTIME     ((XHCI_MAXINTRS + 1) * 0x20)
+#define LEN_DOORBELL    ((XHCI_MAXSLOTS + 1) * 0x20)
 
 #define OFF_OPER        LEN_CAP
 #define OFF_RUNTIME     0x1000
 #define OFF_DOORBELL    0x2000
-/* must be power of 2 */
-#define LEN_REGS        0x4000
 
 #if (OFF_OPER + LEN_OPER) > OFF_RUNTIME
 #error Increase OFF_RUNTIME
@@ -62,8 +60,8 @@
 #if (OFF_RUNTIME + LEN_RUNTIME) > OFF_DOORBELL
 #error Increase OFF_DOORBELL
 #endif
-#if (OFF_DOORBELL + LEN_DOORBELL) > LEN_REGS
-# error Increase LEN_REGS
+#if (OFF_DOORBELL + LEN_DOORBELL) > XHCI_LEN_REGS
+# error Increase XHCI_LEN_REGS
 #endif
 
 /* bit definitions */
@@ -3276,11 +3274,11 @@ static void usb_xhci_init(XHCIState *xhci)
 
     xhci->usbsts = USBSTS_HCH;
 
-    if (xhci->numports_2 > MAXPORTS_2) {
-        xhci->numports_2 = MAXPORTS_2;
+    if (xhci->numports_2 > XHCI_MAXPORTS_2) {
+        xhci->numports_2 = XHCI_MAXPORTS_2;
     }
-    if (xhci->numports_3 > MAXPORTS_3) {
-        xhci->numports_3 = MAXPORTS_3;
+    if (xhci->numports_3 > XHCI_MAXPORTS_3) {
+        xhci->numports_3 = XHCI_MAXPORTS_3;
     }
     usbports = MAX(xhci->numports_2, xhci->numports_3);
     xhci->numports = xhci->numports_2 + xhci->numports_3;
@@ -3302,7 +3300,7 @@ static void usb_xhci_init(XHCIState *xhci)
                 USB_SPEED_MASK_LOW  |
                 USB_SPEED_MASK_FULL |
                 USB_SPEED_MASK_HIGH;
-            assert(i < MAXPORTS);
+            assert(i < XHCI_MAXPORTS);
             snprintf(port->name, sizeof(port->name), "usb2 port #%d", i+1);
             speedmask |= port->speedmask;
         }
@@ -3316,7 +3314,7 @@ static void usb_xhci_init(XHCIState *xhci)
             }
             port->uport = &xhci->uports[i];
             port->speedmask = USB_SPEED_MASK_SUPER;
-            assert(i < MAXPORTS);
+            assert(i < XHCI_MAXPORTS);
             snprintf(port->name, sizeof(port->name), "usb3 port #%d", i+1);
             speedmask |= port->speedmask;
         }
@@ -3331,8 +3329,8 @@ static void usb_xhci_realize(DeviceState *dev, Error **errp)
 
     XHCIState *xhci = XHCI(dev);
 
-    if (xhci->numintrs > MAXINTRS) {
-        xhci->numintrs = MAXINTRS;
+    if (xhci->numintrs > XHCI_MAXINTRS) {
+        xhci->numintrs = XHCI_MAXINTRS;
     }
     while (xhci->numintrs & (xhci->numintrs - 1)) {   /* ! power of 2 */
         xhci->numintrs++;
@@ -3340,8 +3338,8 @@ static void usb_xhci_realize(DeviceState *dev, Error **errp)
     if (xhci->numintrs < 1) {
         xhci->numintrs = 1;
     }
-    if (xhci->numslots > MAXSLOTS) {
-        xhci->numslots = MAXSLOTS;
+    if (xhci->numslots > XHCI_MAXSLOTS) {
+        xhci->numslots = XHCI_MAXSLOTS;
     }
     if (xhci->numslots < 1) {
         xhci->numslots = 1;
@@ -3355,7 +3353,7 @@ static void usb_xhci_realize(DeviceState *dev, Error **errp)
     usb_xhci_init(xhci);
     xhci->mfwrap_timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, xhci_mfwrap_timer, xhci);
 
-    memory_region_init(&xhci->mem, OBJECT(dev), "xhci", LEN_REGS);
+    memory_region_init(&xhci->mem, OBJECT(dev), "xhci", XHCI_LEN_REGS);
     memory_region_init_io(&xhci->mem_cap, OBJECT(dev), &xhci_cap_ops, xhci,
                           "capabilities", LEN_CAP);
     memory_region_init_io(&xhci->mem_oper, OBJECT(dev), &xhci_oper_ops, xhci,
