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diff --git a/usr.sbin/bhyve/Makefile b/usr.sbin/bhyve/Makefile
--- a/usr.sbin/bhyve/Makefile
+++ b/usr.sbin/bhyve/Makefile
@@ -46,6 +46,7 @@
pci_e82545.c \
pci_emul.c \
pci_fbuf.c \
+ pci_gvt-d.c \
pci_hda.c \
pci_hostbridge.c \
pci_irq.c \
diff --git a/usr.sbin/bhyve/pci_gvt-d.c b/usr.sbin/bhyve/pci_gvt-d.c
new file mode 100644
--- /dev/null
+++ b/usr.sbin/bhyve/pci_gvt-d.c
@@ -0,0 +1,55 @@
+/*-
+ * SPDX-License-Identifier: BSD-2-Clause
+ *
+ * Copyright (c) 2020 Beckhoff Automation GmbH & Co. KG
+ * Author: Corvin Köhne <c.koehne@beckhoff.com>
+ */
+
+#include <sys/types.h>
+
+#include <dev/pci/pcireg.h>
+
+#include <errno.h>
+
+#include "pci_gvt-d-opregion.h"
+#include "pci_passthru.h"
+
+#define PCI_VENDOR_INTEL 0x8086
+
+static int
+gvt_d_probe(struct pci_devinst *const pi)
+{
+ struct passthru_softc *sc;
+ uint16_t vendor;
+ uint8_t class;
+
+ sc = pi->pi_arg;
+
+ vendor = read_config(passthru_get_sel(sc), PCIR_VENDOR, 0x02);
+ if (vendor != PCI_VENDOR_INTEL)
+ return (ENXIO);
+
+ class = read_config(passthru_get_sel(sc), PCIR_CLASS, 0x01);
+ if (class != PCIC_DISPLAY)
+ return (ENXIO);
+
+ return (0);
+}
+
+static int
+gvt_d_init(struct pci_devinst *const pi __unused, nvlist_t *const nvl __unused)
+{
+ return (0);
+}
+
+static void
+gvt_d_deinit(struct pci_devinst *const pi __unused)
+{
+}
+
+static struct passthru_dev gvt_d_dev = {
+ .probe = gvt_d_probe,
+ .init = gvt_d_init,
+ .deinit = gvt_d_deinit,
+};
+PASSTHRU_DEV_SET(gvt_d_dev);
diff --git a/usr.sbin/bhyve/pci_passthru.h b/usr.sbin/bhyve/pci_passthru.h
--- a/usr.sbin/bhyve/pci_passthru.h
+++ b/usr.sbin/bhyve/pci_passthru.h
@@ -7,8 +7,11 @@
#pragma once
+#include <sys/linker_set.h>
+
#include <vmmapi.h>
+#include "config.h"
#include "pci_emul.h"
struct passthru_mmio_mapping {
@@ -21,6 +24,13 @@
struct passthru_softc;
+struct passthru_dev {
+ int (*probe)(struct pci_devinst *pi);
+ int (*init)(struct pci_devinst *pi, nvlist_t *nvl);
+ void (*deinit)(struct pci_devinst *pi);
+};
+#define PASSTHRU_DEV_SET(x) DATA_SET(passthru_dev_set, x)
+
typedef int (*cfgread_handler)(struct passthru_softc *sc,
struct pci_devinst *pi, int coff, int bytes, uint32_t *rv);
typedef int (*cfgwrite_handler)(struct passthru_softc *sc,
diff --git a/usr.sbin/bhyve/pci_passthru.c b/usr.sbin/bhyve/pci_passthru.c
--- a/usr.sbin/bhyve/pci_passthru.c
+++ b/usr.sbin/bhyve/pci_passthru.c
@@ -64,7 +64,6 @@
#include <machine/vmm.h>
-#include "config.h"
#include "debug.h"
#include "mem.h"
#include "pci_passthru.h"
@@ -82,6 +81,8 @@
static int pcifd = -1;
+SET_DECLARE(passthru_dev_set, struct passthru_dev);
+
struct passthru_softc {
struct pci_devinst *psc_pi;
/* ROM is handled like a BAR */
@@ -856,6 +857,8 @@
{
int bus, slot, func, error, memflags;
struct passthru_softc *sc;
+ struct passthru_dev **devpp;
+ struct passthru_dev *devp, *dev = NULL;
const char *value;
sc = NULL;
@@ -919,9 +922,26 @@
if ((error = set_pcir_handler(sc, PCIR_COMMAND, 0x04, NULL, NULL)) != 0)
goto done;
+ SET_FOREACH(devpp, passthru_dev_set) {
+ devp = *devpp;
+ assert(devp->probe != NULL);
+ if (devp->probe(pi) == 0) {
+ dev = devp;
+ break;
+ }
+ }
+
+ if (dev != NULL) {
+ error = dev->init(pi, nvl);
+ if (error != 0)
+ goto done;
+ }
+
error = 0; /* success */
done:
if (error) {
+ if (dev != NULL)
+ dev->deinit(pi);
free(sc);
vm_unassign_pptdev(pi->pi_vmctx, bus, slot, func);
}

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