References: bsc#1180047
Xen PV doesn't support uefi or BIOS booting

--- virt-manager-3.2.0/virtManager/details/details.py.orig	2021-01-05 13:02:58.040792391 -0700
+++ virt-manager-3.2.0/virtManager/details/details.py	2021-01-05 13:07:51.212799377 -0700
@@ -696,7 +696,7 @@ class vmmDetails(vmmGObjectUI):
             not self.is_customize_dialog)
         show_firmware = ((self.conn.is_qemu() or
                           self.conn.is_test() or
-                          self.conn.is_xen()) and
+                          self.conn.is_xen() and not self.vm.is_xenpv()) and
                          domcaps.arch_can_uefi())
         uiutil.set_grid_row_visible(
             self.widget("overview-firmware-title"), show_firmware)