diff --git a/usr.sbin/bhyve/acpi_device.h b/usr.sbin/bhyve/acpi_device.h
--- a/usr.sbin/bhyve/acpi_device.h
+++ b/usr.sbin/bhyve/acpi_device.h
@@ -16,18 +16,22 @@
 
 struct acpi_device;
 
+struct acpi_device_emul {
+	const char *name;
+	const char *hid;
+};
+
 /**
  * Creates an ACPI device.
  *
  * @param[out] new_dev Returns the newly create ACPI device.
  * @param[in]  vm_ctx  VM context the ACPI device is created in.
- * @param[in]  name    Name of the ACPI device. Should always be a NULL
- *                     terminated string.
- * @param[in]  hid     Hardware ID of the ACPI device. Should always be a NULL
- *                     terminated string.
+ * @param[in]  emul    Device emulation struct. It contains some information
+ *                     like the name of the ACPI device and some device specific
+ *                     functions.
  */
 int acpi_device_create(struct acpi_device **new_dev, struct vmctx *vm_ctx,
-    const char *name, const char *hid);
+    const struct acpi_device_emul *emul);
 void acpi_device_destroy(struct acpi_device *dev);
 
 int acpi_device_add_res_fixed_ioport(struct acpi_device *dev, UINT16 port,
diff --git a/usr.sbin/bhyve/acpi_device.c b/usr.sbin/bhyve/acpi_device.c
--- a/usr.sbin/bhyve/acpi_device.c
+++ b/usr.sbin/bhyve/acpi_device.c
@@ -41,16 +41,15 @@
  */
 struct acpi_device {
 	struct vmctx *vm_ctx;
-	const char *name;
-	const char *hid;
+	const struct acpi_device_emul *emul;
 	SLIST_HEAD(acpi_resource_list, acpi_resource_list_entry) crs;
 };
 
 int
 acpi_device_create(struct acpi_device **const new_dev,
-    struct vmctx *const vm_ctx, const char *const name, const char *const hid)
+    struct vmctx *const vm_ctx, const struct acpi_device_emul *const emul)
 {
-	if (new_dev == NULL || vm_ctx == NULL || name == NULL || hid == NULL) {
+	if (new_dev == NULL || vm_ctx == NULL || emul == NULL) {
 		return (EINVAL);
 	}
 
@@ -60,8 +59,7 @@
 	}
 
 	dev->vm_ctx = vm_ctx;
-	dev->name = strdup(name);
-	dev->hid = strdup(hid);
+	dev->emul = emul;
 	SLIST_INIT(&dev->crs);
 	if (dev->name == NULL || dev->hid == NULL) {
 		acpi_device_destroy(dev);
@@ -174,9 +172,9 @@
 	dsdt_line("");
 	dsdt_line("  Scope (\\_SB)");
 	dsdt_line("  {");
-	dsdt_line("    Device (%s)", dev->name);
+	dsdt_line("    Device (%s)", dev->emul->name);
 	dsdt_line("    {");
-	dsdt_line("      Name (_HID, \"%s\")", dev->hid);
+	dsdt_line("      Name (_HID, \"%s\")", dev->emul->hid);
 	dsdt_line("      Name (_STA, 0x0F)");
 	dsdt_line("      Name (_CRS, ResourceTemplate ()");
 	dsdt_line("      {");
diff --git a/usr.sbin/bhyve/qemu_fwcfg.c b/usr.sbin/bhyve/qemu_fwcfg.c
--- a/usr.sbin/bhyve/qemu_fwcfg.c
+++ b/usr.sbin/bhyve/qemu_fwcfg.c
@@ -349,6 +349,11 @@
 	return (0);
 }
 
+static const struct acpi_device_emul qemu_fwcfg_acpi_device_emul = {
+	.name = QEMU_FWCFG_ACPI_DEVICE_NAME,
+	.hid = QEMU_FWCFG_ACPI_HARDWARE_ID,
+};
+
 int
 qemu_fwcfg_init(struct vmctx *const ctx)
 {
@@ -361,8 +366,8 @@
 	 * tables and register io ports for fwcfg, if it's used.
 	 */
 	if (strcmp(lpc_fwcfg(), "qemu") == 0) {
-		error = acpi_device_create(&fwcfg_sc.acpi_dev, ctx,
-		    QEMU_FWCFG_ACPI_DEVICE_NAME, QEMU_FWCFG_ACPI_HARDWARE_ID);
+		error = acpi_device_create(&sc.acpi_dev, ctx,
+		    &qemu_fwcfg_acpi_device_emul);
 		if (error) {
 			warnx("%s: failed to create ACPI device for QEMU FwCfg",
 			    __func__);