[PATCH v3] conf: add 'isa' controller type

Roman Bogorodskiy bogorodskiy at gmail.com
Sun Jul 12 03:56:03 UTC 2020


Decided to revive this patch to address
https://gitlab.com/libvirt/libvirt/-/issues/45.

Changes from v2:

 - Rebased to master,
 - Added bhyveDomainDeviceDefValidate() to disallow ISA
   controllers idx other than 0 because we don't support
   more than one ISA controller.

----

Introduce 'isa' controller type. The only supported model
now is 'isa-bridge'. In domain XML it looks this way:

    ...
    <controller type='isa' index='1' model='isa-bridge'>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x01'
               function='0x0'/>
    </controller>
    ...

Currently, this is needed for the bhyve driver to allow choosing a
specific PCI address for that. In bhyve, this controller is used to
attach serial ports and a boot ROM.

bhyve: support 'isa' controller for LPC

Support modeling of the 'isa' controller for bhyve. When controller is
not present in the domain XML, but domain requires it to be there (e.g.
because bootrom is used), implicitly add addition of this controller to
the command line arguments, and bind it to PCI slot 1.

PCI slot 1 is always reserved still. User can manually define any PCI
slot for the 'isa' controller, including PCI slot 1, but other devices
are not allowed to use this address.

bhyve: automatically add 'isa' controller

When domain configuration requires the 'isa' controller to be present,
automatically add it on domain post-parse stage.

Now, as this controller is always available when needed, it's not
necessary to implicitly add it to the bhyve command line, so remove
bhyveBuildLPCArgStr().

Also, make bhyveDomainDefNeedsISAController() static as it's no longer
used outside of bhyve_domain.c.

bhyve: validate that ISA controller always has index 0

More than one ISA controller is not supported by bhyve,
and multiple controllers with the same index are forbidden,
so forbid ISA controllers with non-zero index for bhyve.

Signed-off-by: Roman Bogorodskiy <bogorodskiy at gmail.com>
---
 docs/schemas/domaincommon.rng                 |  6 ++++
 src/bhyve/bhyve_command.c                     | 27 +++++++-------
 src/bhyve/bhyve_device.c                      | 23 +++++++++---
 src/bhyve/bhyve_domain.c                      | 25 +++++++++++--
 src/bhyve/bhyve_domain.h                      |  2 --
 src/conf/domain_conf.c                        |  9 +++++
 src/conf/domain_conf.h                        |  8 +++++
 src/qemu/qemu_command.c                       |  1 +
 src/qemu/qemu_domain.c                        |  1 +
 src/qemu/qemu_domain_address.c                |  1 +
 src/qemu/qemu_validate.c                      |  1 +
 src/vbox/vbox_common.c                        |  1 +
 ...ml2argv-addr-isa-controller-on-slot-1.args | 10 ++++++
 ...2argv-addr-isa-controller-on-slot-1.ldargs |  3 ++
 ...xml2argv-addr-isa-controller-on-slot-1.xml | 26 ++++++++++++++
 ...l2argv-addr-isa-controller-on-slot-31.args | 10 ++++++
 ...argv-addr-isa-controller-on-slot-31.ldargs |  3 ++
 ...ml2argv-addr-isa-controller-on-slot-31.xml | 26 ++++++++++++++
 ...argv-addr-non-isa-controller-on-slot-1.xml | 23 ++++++++++++
 .../bhyvexml2argv-console.args                |  2 +-
 .../bhyvexml2argv-isa-controller.args         | 10 ++++++
 .../bhyvexml2argv-isa-controller.ldargs       |  3 ++
 .../bhyvexml2argv-isa-controller.xml          | 24 +++++++++++++
 ...bhyvexml2argv-isa-multiple-controllers.xml | 25 +++++++++++++
 .../bhyvexml2argv-serial-grub-nocons.args     |  2 +-
 .../bhyvexml2argv-serial-grub.args            |  2 +-
 .../bhyvexml2argv-serial.args                 |  2 +-
 .../bhyvexml2argvdata/bhyvexml2argv-uefi.args |  4 +--
 .../bhyvexml2argv-vnc-autoport.args           |  4 +--
 .../bhyvexml2argv-vnc-vgaconf-io.args         |  4 +--
 .../bhyvexml2argv-vnc-vgaconf-off.args        |  4 +--
 .../bhyvexml2argv-vnc-vgaconf-on.args         |  4 +--
 .../bhyvexml2argvdata/bhyvexml2argv-vnc.args  |  4 +--
 tests/bhyvexml2argvtest.c                     |  5 +++
 ...l2xmlout-addr-isa-controller-on-slot-1.xml | 36 +++++++++++++++++++
 ...2xmlout-addr-isa-controller-on-slot-31.xml | 36 +++++++++++++++++++
 .../bhyvexml2xmlout-console.xml               |  3 ++
 .../bhyvexml2xmlout-isa-controller.xml        | 36 +++++++++++++++++++
 .../bhyvexml2xmlout-serial-grub-nocons.xml    |  3 ++
 .../bhyvexml2xmlout-serial-grub.xml           |  3 ++
 .../bhyvexml2xmlout-serial.xml                |  3 ++
 .../bhyvexml2xmlout-vnc-autoport.xml          |  3 ++
 .../bhyvexml2xmlout-vnc-vgaconf-io.xml        |  3 ++
 .../bhyvexml2xmlout-vnc-vgaconf-off.xml       |  3 ++
 .../bhyvexml2xmlout-vnc-vgaconf-on.xml        |  3 ++
 .../bhyvexml2xmlout-vnc.xml                   |  3 ++
 tests/bhyvexml2xmltest.c                      |  3 ++
 47 files changed, 406 insertions(+), 37 deletions(-)
 create mode 100644 tests/bhyvexml2argvdata/bhyvexml2argv-addr-isa-controller-on-slot-1.args
 create mode 100644 tests/bhyvexml2argvdata/bhyvexml2argv-addr-isa-controller-on-slot-1.ldargs
 create mode 100644 tests/bhyvexml2argvdata/bhyvexml2argv-addr-isa-controller-on-slot-1.xml
 create mode 100644 tests/bhyvexml2argvdata/bhyvexml2argv-addr-isa-controller-on-slot-31.args
 create mode 100644 tests/bhyvexml2argvdata/bhyvexml2argv-addr-isa-controller-on-slot-31.ldargs
 create mode 100644 tests/bhyvexml2argvdata/bhyvexml2argv-addr-isa-controller-on-slot-31.xml
 create mode 100644 tests/bhyvexml2argvdata/bhyvexml2argv-addr-non-isa-controller-on-slot-1.xml
 create mode 100644 tests/bhyvexml2argvdata/bhyvexml2argv-isa-controller.args
 create mode 100644 tests/bhyvexml2argvdata/bhyvexml2argv-isa-controller.ldargs
 create mode 100644 tests/bhyvexml2argvdata/bhyvexml2argv-isa-controller.xml
 create mode 100644 tests/bhyvexml2argvdata/bhyvexml2argv-isa-multiple-controllers.xml
 create mode 100644 tests/bhyvexml2xmloutdata/bhyvexml2xmlout-addr-isa-controller-on-slot-1.xml
 create mode 100644 tests/bhyvexml2xmloutdata/bhyvexml2xmlout-addr-isa-controller-on-slot-31.xml
 create mode 100644 tests/bhyvexml2xmloutdata/bhyvexml2xmlout-isa-controller.xml

diff --git a/docs/schemas/domaincommon.rng b/docs/schemas/domaincommon.rng
index 4b4aa60c66..7bed99b161 100644
--- a/docs/schemas/domaincommon.rng
+++ b/docs/schemas/domaincommon.rng
@@ -2416,6 +2416,12 @@
               </attribute>
             </optional>
           </group>
+          <!-- isa -->
+          <group>
+            <attribute name="type">
+              <value>isa</value>
+            </attribute>
+          </group>
           <!-- pci has an optional attribute "model" -->
           <group>
             <attribute name="type">
diff --git a/src/bhyve/bhyve_command.c b/src/bhyve/bhyve_command.c
index 22d0b24ec4..2a3e10d649 100644
--- a/src/bhyve/bhyve_command.c
+++ b/src/bhyve/bhyve_command.c
@@ -329,7 +329,8 @@ bhyveBuildControllerArgStr(const virDomainDef *def,
                            virDomainControllerDefPtr controller,
                            bhyveConnPtr driver,
                            virCommandPtr cmd,
-                           unsigned *nusbcontrollers)
+                           unsigned *nusbcontrollers,
+                           unsigned *nisacontrollers)
 {
     switch (controller->type) {
     case VIR_DOMAIN_CONTROLLER_TYPE_PCI:
@@ -354,18 +355,20 @@ bhyveBuildControllerArgStr(const virDomainDef *def,
         if (bhyveBuildUSBControllerArgStr(def, controller, cmd) < 0)
             return -1;
         break;
+    case VIR_DOMAIN_CONTROLLER_TYPE_ISA:
+        if (++*nisacontrollers > 1) {
+             virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
+                            "%s", _("only single ISA controller is supported"));
+             return -1;
+        }
+        virCommandAddArg(cmd, "-s");
+        virCommandAddArgFormat(cmd, "%d:0,lpc",
+                                controller->info.addr.pci.slot);
+        break;
     }
     return 0;
 }
 
-static int
-bhyveBuildLPCArgStr(const virDomainDef *def G_GNUC_UNUSED,
-                    virCommandPtr cmd)
-{
-    virCommandAddArgList(cmd, "-s", "1,lpc", NULL);
-    return 0;
-}
-
 static int
 bhyveBuildGraphicsArgStr(const virDomainDef *def,
                          virDomainGraphicsDefPtr graphics,
@@ -490,6 +493,7 @@ virBhyveProcessBuildBhyveCmd(bhyveConnPtr driver, virDomainDefPtr def,
     virCommandPtr cmd = virCommandNew(BHYVE);
     size_t i;
     unsigned nusbcontrollers = 0;
+    unsigned nisacontrollers = 0;
     unsigned nvcpus = virDomainDefGetVcpus(def);
 
     /* CPUs */
@@ -595,7 +599,7 @@ virBhyveProcessBuildBhyveCmd(bhyveConnPtr driver, virDomainDefPtr def,
     /* Devices */
     for (i = 0; i < def->ncontrollers; i++) {
         if (bhyveBuildControllerArgStr(def, def->controllers[i], driver, cmd,
-                                       &nusbcontrollers) < 0)
+                                       &nusbcontrollers, &nisacontrollers) < 0)
             goto error;
     }
     for (i = 0; i < def->nnets; i++) {
@@ -619,9 +623,6 @@ virBhyveProcessBuildBhyveCmd(bhyveConnPtr driver, virDomainDefPtr def,
         }
     }
 
-    if (bhyveDomainDefNeedsISAController(def))
-        bhyveBuildLPCArgStr(def, cmd);
-
     if (bhyveBuildConsoleArgStr(def, cmd) < 0)
         goto error;
 
diff --git a/src/bhyve/bhyve_device.c b/src/bhyve/bhyve_device.c
index fc52280361..52a055f205 100644
--- a/src/bhyve/bhyve_device.c
+++ b/src/bhyve/bhyve_device.c
@@ -46,10 +46,16 @@ bhyveCollectPCIAddress(virDomainDefPtr def G_GNUC_UNUSED,
         if (addr->slot == 0) {
             return 0;
         } else if (addr->slot == 1) {
-            virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
-                           _("PCI bus 0 slot 1 is reserved for the implicit "
-                             "LPC PCI-ISA bridge"));
-            return -1;
+            if (!(device->type == VIR_DOMAIN_DEVICE_CONTROLLER &&
+                  device->data.controller->type == VIR_DOMAIN_CONTROLLER_TYPE_ISA)) {
+                 virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
+                                _("PCI bus 0 slot 1 is reserved for the implicit "
+                                  "LPC PCI-ISA bridge"));
+                 return -1;
+            } else {
+                /* We reserve slot 1 for LPC in bhyveAssignDevicePCISlots(), so exit early */
+                return 0;
+            }
         }
     }
 
@@ -101,6 +107,15 @@ bhyveAssignDevicePCISlots(virDomainDefPtr def,
         return -1;
     }
 
+    for (i = 0; i < def->ncontrollers; i++) {
+         if ((def->controllers[i]->type == VIR_DOMAIN_CONTROLLER_TYPE_ISA) &&
+              virDeviceInfoPCIAddressIsWanted(&def->controllers[i]->info)) {
+             def->controllers[i]->info.type = VIR_DOMAIN_DEVICE_ADDRESS_TYPE_PCI;
+             def->controllers[i]->info.addr.pci = lpc_addr;
+             break;
+         }
+    }
+
     for (i = 0; i < def->ncontrollers; i++) {
         if ((def->controllers[i]->type == VIR_DOMAIN_CONTROLLER_TYPE_PCI) ||
             (def->controllers[i]->type == VIR_DOMAIN_CONTROLLER_TYPE_SATA) ||
diff --git a/src/bhyve/bhyve_domain.c b/src/bhyve/bhyve_domain.c
index 95d6ffd31c..91994c3da5 100644
--- a/src/bhyve/bhyve_domain.c
+++ b/src/bhyve/bhyve_domain.c
@@ -59,13 +59,13 @@ virDomainXMLPrivateDataCallbacks virBhyveDriverPrivateDataCallbacks = {
     .free = bhyveDomainObjPrivateFree,
 };
 
-bool
+static bool
 bhyveDomainDefNeedsISAController(virDomainDefPtr def)
 {
     if (def->os.bootloader == NULL && def->os.loader)
         return true;
 
-    if (def->nserials)
+    if (def->nserials || def->nconsoles)
         return true;
 
     if (def->ngraphics && def->nvideos)
@@ -95,6 +95,11 @@ bhyveDomainDefPostParse(virDomainDefPtr def,
                                        VIR_DOMAIN_CONTROLLER_MODEL_PCI_ROOT) < 0)
         return -1;
 
+    if (bhyveDomainDefNeedsISAController(def))
+        if (virDomainDefMaybeAddController(def, VIR_DOMAIN_CONTROLLER_TYPE_ISA, 0,
+                                           VIR_DOMAIN_CONTROLLER_MODEL_ISA_DEFAULT) < 0)
+            return -1;
+
     return 0;
 }
 
@@ -191,10 +196,26 @@ virBhyveDriverCreateXMLConf(bhyveConnPtr driver)
                                  NULL, NULL);
 }
 
+
+static int
+bhyveDomainDeviceDefValidate(const virDomainDeviceDef *dev,
+                             const virDomainDef *def G_GNUC_UNUSED,
+                             void *opaque G_GNUC_UNUSED)
+{
+    if (dev->type == VIR_DOMAIN_DEVICE_CONTROLLER &&
+        dev->data.controller->type == VIR_DOMAIN_CONTROLLER_TYPE_ISA &&
+        dev->data.controller->idx != 0) {
+        return -1;
+    }
+
+    return 0;
+}
+
 virDomainDefParserConfig virBhyveDriverDomainDefParserConfig = {
     .devicesPostParseCallback = bhyveDomainDeviceDefPostParse,
     .domainPostParseCallback = bhyveDomainDefPostParse,
     .assignAddressesCallback = bhyveDomainDefAssignAddresses,
+    .deviceValidateCallback = bhyveDomainDeviceDefValidate,
 };
 
 static void
diff --git a/src/bhyve/bhyve_domain.h b/src/bhyve/bhyve_domain.h
index e985278041..4e2b11b8de 100644
--- a/src/bhyve/bhyve_domain.h
+++ b/src/bhyve/bhyve_domain.h
@@ -39,5 +39,3 @@ virDomainXMLOptionPtr virBhyveDriverCreateXMLConf(bhyveConnPtr);
 extern virDomainXMLPrivateDataCallbacks virBhyveDriverPrivateDataCallbacks;
 extern virDomainDefParserConfig virBhyveDriverDomainDefParserConfig;
 extern virXMLNamespace virBhyveDriverDomainXMLNamespace;
-
-bool bhyveDomainDefNeedsISAController(virDomainDefPtr def);
diff --git a/src/conf/domain_conf.c b/src/conf/domain_conf.c
index d14485f18d..6befe4bbd8 100644
--- a/src/conf/domain_conf.c
+++ b/src/conf/domain_conf.c
@@ -399,6 +399,7 @@ VIR_ENUM_IMPL(virDomainController,
               "usb",
               "pci",
               "xenbus",
+              "isa",
 );
 
 VIR_ENUM_IMPL(virDomainControllerModelPCI,
@@ -444,6 +445,9 @@ VIR_ENUM_IMPL(virDomainControllerModelSCSI,
               "virtio-non-transitional",
 );
 
+VIR_ENUM_IMPL(virDomainControllerModelISA, VIR_DOMAIN_CONTROLLER_MODEL_ISA_LAST,
+);
+
 VIR_ENUM_IMPL(virDomainControllerModelUSB,
               VIR_DOMAIN_CONTROLLER_MODEL_USB_LAST,
               "piix3-uhci",
@@ -2312,6 +2316,7 @@ virDomainControllerDefNew(virDomainControllerType type)
     case VIR_DOMAIN_CONTROLLER_TYPE_SCSI:
     case VIR_DOMAIN_CONTROLLER_TYPE_SATA:
     case VIR_DOMAIN_CONTROLLER_TYPE_CCID:
+    case VIR_DOMAIN_CONTROLLER_TYPE_ISA:
     case VIR_DOMAIN_CONTROLLER_TYPE_LAST:
         break;
     }
@@ -10975,6 +10980,8 @@ virDomainControllerModelTypeFromString(const virDomainControllerDef *def,
         return virDomainControllerModelIDETypeFromString(model);
     else if (def->type == VIR_DOMAIN_CONTROLLER_TYPE_VIRTIO_SERIAL)
         return virDomainControllerModelVirtioSerialTypeFromString(model);
+    else if (def->type == VIR_DOMAIN_CONTROLLER_TYPE_ISA)
+        return virDomainControllerModelISATypeFromString(model);
 
     return -1;
 }
@@ -10994,6 +11001,8 @@ virDomainControllerModelTypeToString(virDomainControllerDefPtr def,
         return virDomainControllerModelIDETypeToString(model);
     else if (def->type == VIR_DOMAIN_CONTROLLER_TYPE_VIRTIO_SERIAL)
         return virDomainControllerModelVirtioSerialTypeToString(model);
+    else if (def->type == VIR_DOMAIN_CONTROLLER_TYPE_ISA)
+        return virDomainControllerModelISATypeToString(model);
 
     return NULL;
 }
diff --git a/src/conf/domain_conf.h b/src/conf/domain_conf.h
index 6a737591e2..188385cc6b 100644
--- a/src/conf/domain_conf.h
+++ b/src/conf/domain_conf.h
@@ -595,6 +595,7 @@ typedef enum {
     VIR_DOMAIN_CONTROLLER_TYPE_USB,
     VIR_DOMAIN_CONTROLLER_TYPE_PCI,
     VIR_DOMAIN_CONTROLLER_TYPE_XENBUS,
+    VIR_DOMAIN_CONTROLLER_TYPE_ISA,
 
     VIR_DOMAIN_CONTROLLER_TYPE_LAST
 } virDomainControllerType;
@@ -686,6 +687,12 @@ typedef enum {
     VIR_DOMAIN_CONTROLLER_MODEL_VIRTIO_SERIAL_LAST
 } virDomainControllerModelVirtioSerial;
 
+typedef enum {
+    VIR_DOMAIN_CONTROLLER_MODEL_ISA_DEFAULT = -1,
+
+    VIR_DOMAIN_CONTROLLER_MODEL_ISA_LAST
+} virDomainControllerModelISA;
+
 #define IS_USB2_CONTROLLER(ctrl) \
     (((ctrl)->type == VIR_DOMAIN_CONTROLLER_TYPE_USB) && \
      ((ctrl)->model == VIR_DOMAIN_CONTROLLER_MODEL_USB_ICH9_EHCI1 || \
@@ -3547,6 +3554,7 @@ VIR_ENUM_DECL(virDomainControllerModelSCSI);
 VIR_ENUM_DECL(virDomainControllerModelUSB);
 VIR_ENUM_DECL(virDomainControllerModelIDE);
 VIR_ENUM_DECL(virDomainControllerModelVirtioSerial);
+VIR_ENUM_DECL(virDomainControllerModelISA);
 VIR_ENUM_DECL(virDomainFS);
 VIR_ENUM_DECL(virDomainFSDriver);
 VIR_ENUM_DECL(virDomainFSAccessMode);
diff --git a/src/qemu/qemu_command.c b/src/qemu/qemu_command.c
index 24e99e13b8..d4e190a1ae 100644
--- a/src/qemu/qemu_command.c
+++ b/src/qemu/qemu_command.c
@@ -2699,6 +2699,7 @@ qemuBuildControllerDevStr(const virDomainDef *domainDef,
     case VIR_DOMAIN_CONTROLLER_TYPE_IDE:
     case VIR_DOMAIN_CONTROLLER_TYPE_FDC:
     case VIR_DOMAIN_CONTROLLER_TYPE_XENBUS:
+    case VIR_DOMAIN_CONTROLLER_TYPE_ISA:
     case VIR_DOMAIN_CONTROLLER_TYPE_LAST:
         virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
                        _("Unsupported controller type: %s"),
diff --git a/src/qemu/qemu_domain.c b/src/qemu/qemu_domain.c
index 2d9d8226d6..f5dbadb323 100644
--- a/src/qemu/qemu_domain.c
+++ b/src/qemu/qemu_domain.c
@@ -5054,6 +5054,7 @@ qemuDomainControllerDefPostParse(virDomainControllerDefPtr cont,
     case VIR_DOMAIN_CONTROLLER_TYPE_IDE:
     case VIR_DOMAIN_CONTROLLER_TYPE_FDC:
     case VIR_DOMAIN_CONTROLLER_TYPE_XENBUS:
+    case VIR_DOMAIN_CONTROLLER_TYPE_ISA:
     case VIR_DOMAIN_CONTROLLER_TYPE_LAST:
         break;
     }
diff --git a/src/qemu/qemu_domain_address.c b/src/qemu/qemu_domain_address.c
index 058cbda2a2..4e548d2f43 100644
--- a/src/qemu/qemu_domain_address.c
+++ b/src/qemu/qemu_domain_address.c
@@ -677,6 +677,7 @@ qemuDomainDeviceCalculatePCIConnectFlags(virDomainDeviceDefPtr dev,
         case VIR_DOMAIN_CONTROLLER_TYPE_FDC:
         case VIR_DOMAIN_CONTROLLER_TYPE_CCID:
         case VIR_DOMAIN_CONTROLLER_TYPE_XENBUS:
+        case VIR_DOMAIN_CONTROLLER_TYPE_ISA:
         case VIR_DOMAIN_CONTROLLER_TYPE_LAST:
             return 0;
         }
diff --git a/src/qemu/qemu_validate.c b/src/qemu/qemu_validate.c
index bd7590a00a..b5f9ab7ed4 100644
--- a/src/qemu/qemu_validate.c
+++ b/src/qemu/qemu_validate.c
@@ -3220,6 +3220,7 @@ qemuValidateDomainDeviceDefController(const virDomainControllerDef *controller,
     case VIR_DOMAIN_CONTROLLER_TYPE_CCID:
     case VIR_DOMAIN_CONTROLLER_TYPE_USB:
     case VIR_DOMAIN_CONTROLLER_TYPE_XENBUS:
+    case VIR_DOMAIN_CONTROLLER_TYPE_ISA:
     case VIR_DOMAIN_CONTROLLER_TYPE_LAST:
         break;
     }
diff --git a/src/vbox/vbox_common.c b/src/vbox/vbox_common.c
index 15f8eb074a..9b38963e2a 100644
--- a/src/vbox/vbox_common.c
+++ b/src/vbox/vbox_common.c
@@ -397,6 +397,7 @@ vboxSetStorageController(virDomainControllerDefPtr controller,
     case VIR_DOMAIN_CONTROLLER_TYPE_USB:
     case VIR_DOMAIN_CONTROLLER_TYPE_PCI:
     case VIR_DOMAIN_CONTROLLER_TYPE_XENBUS:
+    case VIR_DOMAIN_CONTROLLER_TYPE_ISA:
     case VIR_DOMAIN_CONTROLLER_TYPE_LAST:
         virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
                        _("The vbox driver does not support %s controller type"),
diff --git a/tests/bhyvexml2argvdata/bhyvexml2argv-addr-isa-controller-on-slot-1.args b/tests/bhyvexml2argvdata/bhyvexml2argv-addr-isa-controller-on-slot-1.args
new file mode 100644
index 0000000000..910d1bbcfa
--- /dev/null
+++ b/tests/bhyvexml2argvdata/bhyvexml2argv-addr-isa-controller-on-slot-1.args
@@ -0,0 +1,10 @@
+/usr/sbin/bhyve \
+-c 1 \
+-m 214 \
+-u \
+-H \
+-P \
+-s 0:0,hostbridge \
+-s 1:0,lpc \
+-s 2:0,ahci,hd:/tmp/freebsd.img \
+-s 3:0,virtio-net,faketapdev,mac=52:54:00:b9:94:02 bhyve
diff --git a/tests/bhyvexml2argvdata/bhyvexml2argv-addr-isa-controller-on-slot-1.ldargs b/tests/bhyvexml2argvdata/bhyvexml2argv-addr-isa-controller-on-slot-1.ldargs
new file mode 100644
index 0000000000..32538b558e
--- /dev/null
+++ b/tests/bhyvexml2argvdata/bhyvexml2argv-addr-isa-controller-on-slot-1.ldargs
@@ -0,0 +1,3 @@
+/usr/sbin/bhyveload \
+-m 214 \
+-d /tmp/freebsd.img bhyve
diff --git a/tests/bhyvexml2argvdata/bhyvexml2argv-addr-isa-controller-on-slot-1.xml b/tests/bhyvexml2argvdata/bhyvexml2argv-addr-isa-controller-on-slot-1.xml
new file mode 100644
index 0000000000..4a72ca65a1
--- /dev/null
+++ b/tests/bhyvexml2argvdata/bhyvexml2argv-addr-isa-controller-on-slot-1.xml
@@ -0,0 +1,26 @@
+<domain type='bhyve'>
+  <name>bhyve</name>
+  <uuid>df3be7e7-a104-11e3-aeb0-50e5492bd3dc</uuid>
+  <memory>219136</memory>
+  <vcpu>1</vcpu>
+  <os>
+    <type>hvm</type>
+  </os>
+  <devices>
+    <controller type='isa' index='0'>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x0'/>
+    </controller>
+    <disk type='file'>
+      <driver name='file' type='raw'/>
+      <source file='/tmp/freebsd.img'/>
+      <target dev='hda' bus='sata'/>
+      <address type='drive' controller='0' bus='0' target='2' unit='0'/>
+    </disk>
+    <interface type='bridge'>
+      <mac address='52:54:00:b9:94:02'/>
+      <model type='virtio'/>
+      <source bridge="virbr0"/>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/>
+    </interface>
+  </devices>
+</domain>
diff --git a/tests/bhyvexml2argvdata/bhyvexml2argv-addr-isa-controller-on-slot-31.args b/tests/bhyvexml2argvdata/bhyvexml2argv-addr-isa-controller-on-slot-31.args
new file mode 100644
index 0000000000..ee833eb460
--- /dev/null
+++ b/tests/bhyvexml2argvdata/bhyvexml2argv-addr-isa-controller-on-slot-31.args
@@ -0,0 +1,10 @@
+/usr/sbin/bhyve \
+-c 1 \
+-m 214 \
+-u \
+-H \
+-P \
+-s 0:0,hostbridge \
+-s 31:0,lpc \
+-s 2:0,ahci,hd:/tmp/freebsd.img \
+-s 3:0,virtio-net,faketapdev,mac=52:54:00:b9:94:02 bhyve
diff --git a/tests/bhyvexml2argvdata/bhyvexml2argv-addr-isa-controller-on-slot-31.ldargs b/tests/bhyvexml2argvdata/bhyvexml2argv-addr-isa-controller-on-slot-31.ldargs
new file mode 100644
index 0000000000..32538b558e
--- /dev/null
+++ b/tests/bhyvexml2argvdata/bhyvexml2argv-addr-isa-controller-on-slot-31.ldargs
@@ -0,0 +1,3 @@
+/usr/sbin/bhyveload \
+-m 214 \
+-d /tmp/freebsd.img bhyve
diff --git a/tests/bhyvexml2argvdata/bhyvexml2argv-addr-isa-controller-on-slot-31.xml b/tests/bhyvexml2argvdata/bhyvexml2argv-addr-isa-controller-on-slot-31.xml
new file mode 100644
index 0000000000..3b8e8a3664
--- /dev/null
+++ b/tests/bhyvexml2argvdata/bhyvexml2argv-addr-isa-controller-on-slot-31.xml
@@ -0,0 +1,26 @@
+<domain type='bhyve'>
+  <name>bhyve</name>
+  <uuid>df3be7e7-a104-11e3-aeb0-50e5492bd3dc</uuid>
+  <memory>219136</memory>
+  <vcpu>1</vcpu>
+  <os>
+    <type>hvm</type>
+  </os>
+  <devices>
+    <controller type='isa' index='0'>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x1f' function='0x0'/>
+    </controller>
+    <disk type='file'>
+      <driver name='file' type='raw'/>
+      <source file='/tmp/freebsd.img'/>
+      <target dev='hda' bus='sata'/>
+      <address type='drive' controller='0' bus='0' target='2' unit='0'/>
+    </disk>
+    <interface type='bridge'>
+      <mac address='52:54:00:b9:94:02'/>
+      <model type='virtio'/>
+      <source bridge="virbr0"/>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/>
+    </interface>
+  </devices>
+</domain>
diff --git a/tests/bhyvexml2argvdata/bhyvexml2argv-addr-non-isa-controller-on-slot-1.xml b/tests/bhyvexml2argvdata/bhyvexml2argv-addr-non-isa-controller-on-slot-1.xml
new file mode 100644
index 0000000000..88ad9aebb7
--- /dev/null
+++ b/tests/bhyvexml2argvdata/bhyvexml2argv-addr-non-isa-controller-on-slot-1.xml
@@ -0,0 +1,23 @@
+<domain type='bhyve'>
+  <name>bhyve</name>
+  <uuid>df3be7e7-a104-11e3-aeb0-50e5492bd3dc</uuid>
+  <memory>219136</memory>
+  <vcpu>1</vcpu>
+  <os>
+    <type>hvm</type>
+  </os>
+  <devices>
+    <disk type='file'>
+      <driver name='file' type='raw'/>
+      <source file='/tmp/freebsd.img'/>
+      <target dev='hda' bus='sata'/>
+      <address type='drive' controller='0' bus='0' target='2' unit='0'/>
+    </disk>
+    <interface type='bridge'>
+      <mac address='52:54:00:b9:94:02'/>
+      <model type='virtio'/>
+      <source bridge="virbr0"/>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x0'/>
+    </interface>
+  </devices>
+</domain>
diff --git a/tests/bhyvexml2argvdata/bhyvexml2argv-console.args b/tests/bhyvexml2argvdata/bhyvexml2argv-console.args
index 6ab91ae7e4..25fbd4727e 100644
--- a/tests/bhyvexml2argvdata/bhyvexml2argv-console.args
+++ b/tests/bhyvexml2argvdata/bhyvexml2argv-console.args
@@ -5,7 +5,7 @@
 -H \
 -P \
 -s 0:0,hostbridge \
+-s 1:0,lpc \
 -s 2:0,ahci,hd:/tmp/freebsd.img \
 -s 3:0,virtio-net,faketapdev,mac=52:54:00:b1:42:eb \
--s 1,lpc \
 -l com1,/dev/nmdm0A bhyve
diff --git a/tests/bhyvexml2argvdata/bhyvexml2argv-isa-controller.args b/tests/bhyvexml2argvdata/bhyvexml2argv-isa-controller.args
new file mode 100644
index 0000000000..910d1bbcfa
--- /dev/null
+++ b/tests/bhyvexml2argvdata/bhyvexml2argv-isa-controller.args
@@ -0,0 +1,10 @@
+/usr/sbin/bhyve \
+-c 1 \
+-m 214 \
+-u \
+-H \
+-P \
+-s 0:0,hostbridge \
+-s 1:0,lpc \
+-s 2:0,ahci,hd:/tmp/freebsd.img \
+-s 3:0,virtio-net,faketapdev,mac=52:54:00:b9:94:02 bhyve
diff --git a/tests/bhyvexml2argvdata/bhyvexml2argv-isa-controller.ldargs b/tests/bhyvexml2argvdata/bhyvexml2argv-isa-controller.ldargs
new file mode 100644
index 0000000000..32538b558e
--- /dev/null
+++ b/tests/bhyvexml2argvdata/bhyvexml2argv-isa-controller.ldargs
@@ -0,0 +1,3 @@
+/usr/sbin/bhyveload \
+-m 214 \
+-d /tmp/freebsd.img bhyve
diff --git a/tests/bhyvexml2argvdata/bhyvexml2argv-isa-controller.xml b/tests/bhyvexml2argvdata/bhyvexml2argv-isa-controller.xml
new file mode 100644
index 0000000000..279ac6669a
--- /dev/null
+++ b/tests/bhyvexml2argvdata/bhyvexml2argv-isa-controller.xml
@@ -0,0 +1,24 @@
+<domain type='bhyve'>
+  <name>bhyve</name>
+  <uuid>df3be7e7-a104-11e3-aeb0-50e5492bd3dc</uuid>
+  <memory>219136</memory>
+  <vcpu>1</vcpu>
+  <os>
+    <type>hvm</type>
+  </os>
+  <devices>
+    <controller type='isa' index='0'/>
+    <disk type='file'>
+      <driver name='file' type='raw'/>
+      <source file='/tmp/freebsd.img'/>
+      <target dev='hda' bus='sata'/>
+      <address type='drive' controller='0' bus='0' target='2' unit='0'/>
+    </disk>
+    <interface type='bridge'>
+      <mac address='52:54:00:b9:94:02'/>
+      <model type='virtio'/>
+      <source bridge="virbr0"/>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/>
+    </interface>
+  </devices>
+</domain>
diff --git a/tests/bhyvexml2argvdata/bhyvexml2argv-isa-multiple-controllers.xml b/tests/bhyvexml2argvdata/bhyvexml2argv-isa-multiple-controllers.xml
new file mode 100644
index 0000000000..d087d5fb4c
--- /dev/null
+++ b/tests/bhyvexml2argvdata/bhyvexml2argv-isa-multiple-controllers.xml
@@ -0,0 +1,25 @@
+<domain type='bhyve'>
+  <name>bhyve</name>
+  <uuid>df3be7e7-a104-11e3-aeb0-50e5492bd3dc</uuid>
+  <memory>219136</memory>
+  <vcpu>1</vcpu>
+  <os>
+    <type>hvm</type>
+  </os>
+  <devices>
+    <controller type='isa' index='1'/>
+    <controller type='isa' index='2'/>
+    <disk type='file'>
+      <driver name='file' type='raw'/>
+      <source file='/tmp/freebsd.img'/>
+      <target dev='hda' bus='sata'/>
+      <address type='drive' controller='0' bus='0' target='2' unit='0'/>
+    </disk>
+    <interface type='bridge'>
+      <mac address='52:54:00:b9:94:02'/>
+      <model type='virtio'/>
+      <source bridge="virbr0"/>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/>
+    </interface>
+  </devices>
+</domain>
diff --git a/tests/bhyvexml2argvdata/bhyvexml2argv-serial-grub-nocons.args b/tests/bhyvexml2argvdata/bhyvexml2argv-serial-grub-nocons.args
index 42a278208d..02846cb893 100644
--- a/tests/bhyvexml2argvdata/bhyvexml2argv-serial-grub-nocons.args
+++ b/tests/bhyvexml2argvdata/bhyvexml2argv-serial-grub-nocons.args
@@ -5,7 +5,7 @@
 -H \
 -P \
 -s 0:0,hostbridge \
+-s 1:0,lpc \
 -s 2:0,ahci-hd,/tmp/freebsd.img \
 -s 3:0,virtio-net,faketapdev,mac=52:54:00:a7:cd:5b \
--s 1,lpc \
 -l com1,/dev/nmdm0A bhyve
diff --git a/tests/bhyvexml2argvdata/bhyvexml2argv-serial-grub.args b/tests/bhyvexml2argvdata/bhyvexml2argv-serial-grub.args
index 313724dc90..e4712b448c 100644
--- a/tests/bhyvexml2argvdata/bhyvexml2argv-serial-grub.args
+++ b/tests/bhyvexml2argvdata/bhyvexml2argv-serial-grub.args
@@ -5,7 +5,7 @@
 -H \
 -P \
 -s 0:0,hostbridge \
+-s 1:0,lpc \
 -s 2:0,ahci,hd:/tmp/freebsd.img \
 -s 3:0,virtio-net,faketapdev,mac=52:54:00:f0:72:11 \
--s 1,lpc \
 -l com1,/dev/nmdm0A bhyve
diff --git a/tests/bhyvexml2argvdata/bhyvexml2argv-serial.args b/tests/bhyvexml2argvdata/bhyvexml2argv-serial.args
index 059e457072..f45a190137 100644
--- a/tests/bhyvexml2argvdata/bhyvexml2argv-serial.args
+++ b/tests/bhyvexml2argvdata/bhyvexml2argv-serial.args
@@ -5,7 +5,7 @@
 -H \
 -P \
 -s 0:0,hostbridge \
+-s 1:0,lpc \
 -s 2:0,ahci,hd:/tmp/freebsd.img \
 -s 3:0,virtio-net,faketapdev,mac=52:54:00:4f:f3:5b \
--s 1,lpc \
 -l com1,/dev/nmdm0A bhyve
diff --git a/tests/bhyvexml2argvdata/bhyvexml2argv-uefi.args b/tests/bhyvexml2argvdata/bhyvexml2argv-uefi.args
index 8ff8673ed4..937b066e8c 100644
--- a/tests/bhyvexml2argvdata/bhyvexml2argv-uefi.args
+++ b/tests/bhyvexml2argvdata/bhyvexml2argv-uefi.args
@@ -6,6 +6,6 @@
 -P \
 -s 0:0,hostbridge \
 -l bootrom,/path/to/test.fd \
+-s 1:0,lpc \
 -s 2:0,ahci,hd:/tmp/freebsd.img \
--s 3:0,virtio-net,faketapdev,mac=52:54:00:00:00:00 \
--s 1,lpc bhyve
+-s 3:0,virtio-net,faketapdev,mac=52:54:00:00:00:00 bhyve
diff --git a/tests/bhyvexml2argvdata/bhyvexml2argv-vnc-autoport.args b/tests/bhyvexml2argvdata/bhyvexml2argv-vnc-autoport.args
index 039526ff35..551469dabe 100644
--- a/tests/bhyvexml2argvdata/bhyvexml2argv-vnc-autoport.args
+++ b/tests/bhyvexml2argvdata/bhyvexml2argv-vnc-autoport.args
@@ -6,7 +6,7 @@
 -P \
 -s 0:0,hostbridge \
 -l bootrom,/path/to/test.fd \
+-s 1:0,lpc \
 -s 2:0,ahci,hd:/tmp/freebsd.img \
 -s 3:0,virtio-net,faketapdev,mac=52:54:00:00:00:00 \
--s 4:0,fbuf,tcp=127.0.0.1:5900 \
--s 1,lpc bhyve
+-s 4:0,fbuf,tcp=127.0.0.1:5900 bhyve
diff --git a/tests/bhyvexml2argvdata/bhyvexml2argv-vnc-vgaconf-io.args b/tests/bhyvexml2argvdata/bhyvexml2argv-vnc-vgaconf-io.args
index da37971009..47022e84cf 100644
--- a/tests/bhyvexml2argvdata/bhyvexml2argv-vnc-vgaconf-io.args
+++ b/tests/bhyvexml2argvdata/bhyvexml2argv-vnc-vgaconf-io.args
@@ -6,7 +6,7 @@
 -P \
 -s 0:0,hostbridge \
 -l bootrom,/path/to/test.fd \
+-s 1:0,lpc \
 -s 2:0,ahci,hd:/tmp/freebsd.img \
 -s 3:0,virtio-net,faketapdev,mac=52:54:00:00:00:00 \
--s 4:0,fbuf,tcp=127.0.0.1:5904,vga=io \
--s 1,lpc bhyve
+-s 4:0,fbuf,tcp=127.0.0.1:5904,vga=io bhyve
diff --git a/tests/bhyvexml2argvdata/bhyvexml2argv-vnc-vgaconf-off.args b/tests/bhyvexml2argvdata/bhyvexml2argv-vnc-vgaconf-off.args
index 70347ee0b6..923098f3db 100644
--- a/tests/bhyvexml2argvdata/bhyvexml2argv-vnc-vgaconf-off.args
+++ b/tests/bhyvexml2argvdata/bhyvexml2argv-vnc-vgaconf-off.args
@@ -6,7 +6,7 @@
 -P \
 -s 0:0,hostbridge \
 -l bootrom,/path/to/test.fd \
+-s 1:0,lpc \
 -s 2:0,ahci,hd:/tmp/freebsd.img \
 -s 3:0,virtio-net,faketapdev,mac=52:54:00:00:00:00 \
--s 4:0,fbuf,tcp=127.0.0.1:5904,vga=off \
--s 1,lpc bhyve
+-s 4:0,fbuf,tcp=127.0.0.1:5904,vga=off bhyve
diff --git a/tests/bhyvexml2argvdata/bhyvexml2argv-vnc-vgaconf-on.args b/tests/bhyvexml2argvdata/bhyvexml2argv-vnc-vgaconf-on.args
index d0e1d81e2a..9225f5d133 100644
--- a/tests/bhyvexml2argvdata/bhyvexml2argv-vnc-vgaconf-on.args
+++ b/tests/bhyvexml2argvdata/bhyvexml2argv-vnc-vgaconf-on.args
@@ -6,7 +6,7 @@
 -P \
 -s 0:0,hostbridge \
 -l bootrom,/path/to/test.fd \
+-s 1:0,lpc \
 -s 2:0,ahci,hd:/tmp/freebsd.img \
 -s 3:0,virtio-net,faketapdev,mac=52:54:00:00:00:00 \
--s 4:0,fbuf,tcp=127.0.0.1:5904,vga=on \
--s 1,lpc bhyve
+-s 4:0,fbuf,tcp=127.0.0.1:5904,vga=on bhyve
diff --git a/tests/bhyvexml2argvdata/bhyvexml2argv-vnc.args b/tests/bhyvexml2argvdata/bhyvexml2argv-vnc.args
index 90889b8f39..cd7a543265 100644
--- a/tests/bhyvexml2argvdata/bhyvexml2argv-vnc.args
+++ b/tests/bhyvexml2argvdata/bhyvexml2argv-vnc.args
@@ -6,7 +6,7 @@
 -P \
 -s 0:0,hostbridge \
 -l bootrom,/path/to/test.fd \
+-s 1:0,lpc \
 -s 2:0,ahci,hd:/tmp/freebsd.img \
 -s 3:0,virtio-net,faketapdev,mac=52:54:00:00:00:00 \
--s 4:0,fbuf,tcp=127.0.0.1:5904 \
--s 1,lpc bhyve
+-s 4:0,fbuf,tcp=127.0.0.1:5904 bhyve
diff --git a/tests/bhyvexml2argvtest.c b/tests/bhyvexml2argvtest.c
index 9e7eb218b8..6e8b62dc9b 100644
--- a/tests/bhyvexml2argvtest.c
+++ b/tests/bhyvexml2argvtest.c
@@ -210,6 +210,8 @@ mymain(void)
     DO_TEST_FAILURE("cputopology-nvcpu-mismatch");
     DO_TEST("commandline");
     DO_TEST("msrs");
+    DO_TEST("isa-controller");
+    DO_TEST_FAILURE("isa-multiple-controllers");
 
     /* Address allocation tests */
     DO_TEST("addr-single-sata-disk");
@@ -217,6 +219,9 @@ mymain(void)
     DO_TEST("addr-more-than-32-sata-disks");
     DO_TEST("addr-single-virtio-disk");
     DO_TEST("addr-multiple-virtio-disks");
+    DO_TEST("addr-isa-controller-on-slot-1");
+    DO_TEST("addr-isa-controller-on-slot-31");
+    DO_TEST_FAILURE("addr-non-isa-controller-on-slot-1");
 
     /* The same without 32 devs per controller support */
     driver.bhyvecaps ^= BHYVE_CAP_AHCI32SLOT;
diff --git a/tests/bhyvexml2xmloutdata/bhyvexml2xmlout-addr-isa-controller-on-slot-1.xml b/tests/bhyvexml2xmloutdata/bhyvexml2xmlout-addr-isa-controller-on-slot-1.xml
new file mode 100644
index 0000000000..c1424a65e6
--- /dev/null
+++ b/tests/bhyvexml2xmloutdata/bhyvexml2xmlout-addr-isa-controller-on-slot-1.xml
@@ -0,0 +1,36 @@
+<domain type='bhyve'>
+  <name>bhyve</name>
+  <uuid>df3be7e7-a104-11e3-aeb0-50e5492bd3dc</uuid>
+  <memory unit='KiB'>219136</memory>
+  <currentMemory unit='KiB'>219136</currentMemory>
+  <vcpu placement='static'>1</vcpu>
+  <os>
+    <type arch='x86_64'>hvm</type>
+    <boot dev='hd'/>
+  </os>
+  <clock offset='utc'/>
+  <on_poweroff>destroy</on_poweroff>
+  <on_reboot>restart</on_reboot>
+  <on_crash>destroy</on_crash>
+  <devices>
+    <disk type='file' device='disk'>
+      <driver name='file' type='raw'/>
+      <source file='/tmp/freebsd.img'/>
+      <target dev='hda' bus='sata'/>
+      <address type='drive' controller='0' bus='0' target='2' unit='0'/>
+    </disk>
+    <controller type='isa' index='0'>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x0'/>
+    </controller>
+    <controller type='pci' index='0' model='pci-root'/>
+    <controller type='sata' index='0'>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x0'/>
+    </controller>
+    <interface type='bridge'>
+      <mac address='52:54:00:b9:94:02'/>
+      <source bridge='virbr0'/>
+      <model type='virtio'/>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/>
+    </interface>
+  </devices>
+</domain>
diff --git a/tests/bhyvexml2xmloutdata/bhyvexml2xmlout-addr-isa-controller-on-slot-31.xml b/tests/bhyvexml2xmloutdata/bhyvexml2xmlout-addr-isa-controller-on-slot-31.xml
new file mode 100644
index 0000000000..f99c5b6431
--- /dev/null
+++ b/tests/bhyvexml2xmloutdata/bhyvexml2xmlout-addr-isa-controller-on-slot-31.xml
@@ -0,0 +1,36 @@
+<domain type='bhyve'>
+  <name>bhyve</name>
+  <uuid>df3be7e7-a104-11e3-aeb0-50e5492bd3dc</uuid>
+  <memory unit='KiB'>219136</memory>
+  <currentMemory unit='KiB'>219136</currentMemory>
+  <vcpu placement='static'>1</vcpu>
+  <os>
+    <type arch='x86_64'>hvm</type>
+    <boot dev='hd'/>
+  </os>
+  <clock offset='utc'/>
+  <on_poweroff>destroy</on_poweroff>
+  <on_reboot>restart</on_reboot>
+  <on_crash>destroy</on_crash>
+  <devices>
+    <disk type='file' device='disk'>
+      <driver name='file' type='raw'/>
+      <source file='/tmp/freebsd.img'/>
+      <target dev='hda' bus='sata'/>
+      <address type='drive' controller='0' bus='0' target='2' unit='0'/>
+    </disk>
+    <controller type='isa' index='0'>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x1f' function='0x0'/>
+    </controller>
+    <controller type='pci' index='0' model='pci-root'/>
+    <controller type='sata' index='0'>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x0'/>
+    </controller>
+    <interface type='bridge'>
+      <mac address='52:54:00:b9:94:02'/>
+      <source bridge='virbr0'/>
+      <model type='virtio'/>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/>
+    </interface>
+  </devices>
+</domain>
diff --git a/tests/bhyvexml2xmloutdata/bhyvexml2xmlout-console.xml b/tests/bhyvexml2xmloutdata/bhyvexml2xmlout-console.xml
index 78d4d30016..5309bdc7cf 100644
--- a/tests/bhyvexml2xmloutdata/bhyvexml2xmlout-console.xml
+++ b/tests/bhyvexml2xmloutdata/bhyvexml2xmlout-console.xml
@@ -20,6 +20,9 @@
       <address type='drive' controller='0' bus='0' target='2' unit='0'/>
     </disk>
     <controller type='pci' index='0' model='pci-root'/>
+    <controller type='isa' index='0'>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x0'/>
+    </controller>
     <controller type='sata' index='0'>
       <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x0'/>
     </controller>
diff --git a/tests/bhyvexml2xmloutdata/bhyvexml2xmlout-isa-controller.xml b/tests/bhyvexml2xmloutdata/bhyvexml2xmlout-isa-controller.xml
new file mode 100644
index 0000000000..c1424a65e6
--- /dev/null
+++ b/tests/bhyvexml2xmloutdata/bhyvexml2xmlout-isa-controller.xml
@@ -0,0 +1,36 @@
+<domain type='bhyve'>
+  <name>bhyve</name>
+  <uuid>df3be7e7-a104-11e3-aeb0-50e5492bd3dc</uuid>
+  <memory unit='KiB'>219136</memory>
+  <currentMemory unit='KiB'>219136</currentMemory>
+  <vcpu placement='static'>1</vcpu>
+  <os>
+    <type arch='x86_64'>hvm</type>
+    <boot dev='hd'/>
+  </os>
+  <clock offset='utc'/>
+  <on_poweroff>destroy</on_poweroff>
+  <on_reboot>restart</on_reboot>
+  <on_crash>destroy</on_crash>
+  <devices>
+    <disk type='file' device='disk'>
+      <driver name='file' type='raw'/>
+      <source file='/tmp/freebsd.img'/>
+      <target dev='hda' bus='sata'/>
+      <address type='drive' controller='0' bus='0' target='2' unit='0'/>
+    </disk>
+    <controller type='isa' index='0'>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x0'/>
+    </controller>
+    <controller type='pci' index='0' model='pci-root'/>
+    <controller type='sata' index='0'>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x0'/>
+    </controller>
+    <interface type='bridge'>
+      <mac address='52:54:00:b9:94:02'/>
+      <source bridge='virbr0'/>
+      <model type='virtio'/>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/>
+    </interface>
+  </devices>
+</domain>
diff --git a/tests/bhyvexml2xmloutdata/bhyvexml2xmlout-serial-grub-nocons.xml b/tests/bhyvexml2xmloutdata/bhyvexml2xmlout-serial-grub-nocons.xml
index 845cb09e9f..f89d678abd 100644
--- a/tests/bhyvexml2xmloutdata/bhyvexml2xmlout-serial-grub-nocons.xml
+++ b/tests/bhyvexml2xmloutdata/bhyvexml2xmlout-serial-grub-nocons.xml
@@ -20,6 +20,9 @@
       <address type='drive' controller='0' bus='0' target='2' unit='0'/>
     </disk>
     <controller type='pci' index='0' model='pci-root'/>
+    <controller type='isa' index='0'>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x0'/>
+    </controller>
     <controller type='sata' index='0'>
       <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x0'/>
     </controller>
diff --git a/tests/bhyvexml2xmloutdata/bhyvexml2xmlout-serial-grub.xml b/tests/bhyvexml2xmloutdata/bhyvexml2xmlout-serial-grub.xml
index 6c8fda32af..29a36499f5 100644
--- a/tests/bhyvexml2xmloutdata/bhyvexml2xmlout-serial-grub.xml
+++ b/tests/bhyvexml2xmloutdata/bhyvexml2xmlout-serial-grub.xml
@@ -20,6 +20,9 @@
       <address type='drive' controller='0' bus='0' target='2' unit='0'/>
     </disk>
     <controller type='pci' index='0' model='pci-root'/>
+    <controller type='isa' index='0'>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x0'/>
+    </controller>
     <controller type='sata' index='0'>
       <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x0'/>
     </controller>
diff --git a/tests/bhyvexml2xmloutdata/bhyvexml2xmlout-serial.xml b/tests/bhyvexml2xmloutdata/bhyvexml2xmlout-serial.xml
index eb50cc05ad..ec03da2bfe 100644
--- a/tests/bhyvexml2xmloutdata/bhyvexml2xmlout-serial.xml
+++ b/tests/bhyvexml2xmloutdata/bhyvexml2xmlout-serial.xml
@@ -20,6 +20,9 @@
       <address type='drive' controller='0' bus='0' target='2' unit='0'/>
     </disk>
     <controller type='pci' index='0' model='pci-root'/>
+    <controller type='isa' index='0'>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x0'/>
+    </controller>
     <controller type='sata' index='0'>
       <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x0'/>
     </controller>
diff --git a/tests/bhyvexml2xmloutdata/bhyvexml2xmlout-vnc-autoport.xml b/tests/bhyvexml2xmloutdata/bhyvexml2xmlout-vnc-autoport.xml
index d6cfe76b70..041ab4e319 100644
--- a/tests/bhyvexml2xmloutdata/bhyvexml2xmlout-vnc-autoport.xml
+++ b/tests/bhyvexml2xmloutdata/bhyvexml2xmlout-vnc-autoport.xml
@@ -21,6 +21,9 @@
       <address type='drive' controller='0' bus='0' target='2' unit='0'/>
     </disk>
     <controller type='pci' index='0' model='pci-root'/>
+    <controller type='isa' index='0'>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x0'/>
+    </controller>
     <controller type='sata' index='0'>
       <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x0'/>
     </controller>
diff --git a/tests/bhyvexml2xmloutdata/bhyvexml2xmlout-vnc-vgaconf-io.xml b/tests/bhyvexml2xmloutdata/bhyvexml2xmlout-vnc-vgaconf-io.xml
index 9e470e432e..58e71282e7 100644
--- a/tests/bhyvexml2xmloutdata/bhyvexml2xmlout-vnc-vgaconf-io.xml
+++ b/tests/bhyvexml2xmloutdata/bhyvexml2xmlout-vnc-vgaconf-io.xml
@@ -21,6 +21,9 @@
       <address type='drive' controller='0' bus='0' target='2' unit='0'/>
     </disk>
     <controller type='pci' index='0' model='pci-root'/>
+    <controller type='isa' index='0'>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x0'/>
+    </controller>
     <controller type='sata' index='0'>
       <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x0'/>
     </controller>
diff --git a/tests/bhyvexml2xmloutdata/bhyvexml2xmlout-vnc-vgaconf-off.xml b/tests/bhyvexml2xmloutdata/bhyvexml2xmlout-vnc-vgaconf-off.xml
index 89c4ceac57..2c37762edb 100644
--- a/tests/bhyvexml2xmloutdata/bhyvexml2xmlout-vnc-vgaconf-off.xml
+++ b/tests/bhyvexml2xmloutdata/bhyvexml2xmlout-vnc-vgaconf-off.xml
@@ -21,6 +21,9 @@
       <address type='drive' controller='0' bus='0' target='2' unit='0'/>
     </disk>
     <controller type='pci' index='0' model='pci-root'/>
+    <controller type='isa' index='0'>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x0'/>
+    </controller>
     <controller type='sata' index='0'>
       <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x0'/>
     </controller>
diff --git a/tests/bhyvexml2xmloutdata/bhyvexml2xmlout-vnc-vgaconf-on.xml b/tests/bhyvexml2xmloutdata/bhyvexml2xmlout-vnc-vgaconf-on.xml
index 86d8939364..a9f37dca66 100644
--- a/tests/bhyvexml2xmloutdata/bhyvexml2xmlout-vnc-vgaconf-on.xml
+++ b/tests/bhyvexml2xmloutdata/bhyvexml2xmlout-vnc-vgaconf-on.xml
@@ -21,6 +21,9 @@
       <address type='drive' controller='0' bus='0' target='2' unit='0'/>
     </disk>
     <controller type='pci' index='0' model='pci-root'/>
+    <controller type='isa' index='0'>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x0'/>
+    </controller>
     <controller type='sata' index='0'>
       <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x0'/>
     </controller>
diff --git a/tests/bhyvexml2xmloutdata/bhyvexml2xmlout-vnc.xml b/tests/bhyvexml2xmloutdata/bhyvexml2xmlout-vnc.xml
index 9e470e432e..58e71282e7 100644
--- a/tests/bhyvexml2xmloutdata/bhyvexml2xmlout-vnc.xml
+++ b/tests/bhyvexml2xmloutdata/bhyvexml2xmlout-vnc.xml
@@ -21,6 +21,9 @@
       <address type='drive' controller='0' bus='0' target='2' unit='0'/>
     </disk>
     <controller type='pci' index='0' model='pci-root'/>
+    <controller type='isa' index='0'>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x0'/>
+    </controller>
     <controller type='sata' index='0'>
       <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x0'/>
     </controller>
diff --git a/tests/bhyvexml2xmltest.c b/tests/bhyvexml2xmltest.c
index a0c20a14c1..cc04f8e3ce 100644
--- a/tests/bhyvexml2xmltest.c
+++ b/tests/bhyvexml2xmltest.c
@@ -110,6 +110,7 @@ mymain(void)
     DO_TEST_DIFFERENT("vnc-autoport");
     DO_TEST_DIFFERENT("commandline");
     DO_TEST_DIFFERENT("msrs");
+    DO_TEST_DIFFERENT("isa-controller");
 
     /* Address allocation tests */
     DO_TEST_DIFFERENT("addr-single-sata-disk");
@@ -117,6 +118,8 @@ mymain(void)
     DO_TEST_DIFFERENT("addr-more-than-32-sata-disks");
     DO_TEST_DIFFERENT("addr-single-virtio-disk");
     DO_TEST_DIFFERENT("addr-multiple-virtio-disks");
+    DO_TEST_DIFFERENT("addr-isa-controller-on-slot-1");
+    DO_TEST_DIFFERENT("addr-isa-controller-on-slot-31");
 
     /* The same without 32 devs per controller support */
     driver.bhyvecaps ^= BHYVE_CAP_AHCI32SLOT;
-- 
2.27.0




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