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diff --git a/usr.sbin/bhyve/pci_gvt-d.c b/usr.sbin/bhyve/pci_gvt-d.c
--- a/usr.sbin/bhyve/pci_gvt-d.c
+++ b/usr.sbin/bhyve/pci_gvt-d.c
@@ -199,8 +199,40 @@
opregion->len = header->size * KB;
munmap(header, sizeof(header));
+ opregion->hva = mmap(NULL, opregion->len * KB, PROT_READ, MAP_SHARED,
+ memfd, opregion->hpa);
+ if (opregion->hva == MAP_FAILED) {
+ warnx("%s: Unable to map host OpRegion", __func__);
+ close(memfd);
+ return (-1);
+ }
close(memfd);
+ opregion->gpa = gvt_d_alloc_mmio_memory(opregion->hpa, opregion->len,
+ E820_ALIGNMENT_NONE, E820_TYPE_NVS);
+ if (opregion->gpa == 0) {
+ warnx(
+ "%s: Unable to add OpRegion to E820 table (hpa 0x%lx len 0x%lx)",
+ __func__, opregion->hpa, opregion->len);
+ e820_dump_table();
+ return (-1);
+ }
+ opregion->gva = vm_map_gpa(pi->pi_vmctx, opregion->gpa, opregion->len);
+ if (opregion->gva == NULL) {
+ warnx("%s: Unable to map guest OpRegion", __func__);
+ return (-1);
+ }
+ if (opregion->gpa != opregion->hpa) {
+ /*
+ * A 1:1 host to guest mapping is not required but this could
+ * change in the future.
+ */
+ warnx(
+ "Warning: Unable to reuse host address of OpRegion. GPU passthrough might not work properly.");
+ }
+
+ memcpy(opregion->gva, opregion->hva, opregion->len);
+
return (0);
}
@@ -224,6 +256,16 @@
}
void
-gvt_d_deinit(struct pci_devinst *const pi __unused)
+gvt_d_deinit(struct pci_devinst *const pi)
{
+ struct passthru_softc *sc;
+ struct passthru_mmio_mapping *opregion;
+
+ sc = pi->pi_arg;
+
+ opregion = passthru_get_mmio(sc, GVT_D_MAP_OPREGION);
+
+ /* HVA is only set, if it's initialized */
+ if (opregion->hva)
+ munmap((void *)opregion->hva, opregion->len);
}

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