1 files changed, 81 insertions, 0 deletions

diff --git a/hw/i386/intel_iommu.c b/hw/i386/intel_iommu.c
index c69c0d285b..019d1c9c80 100644
--- a/hw/i386/intel_iommu.c
+++ b/hw/i386/intel_iommu.c
@@ -61,6 +61,12 @@ struct vtd_as_key {
     uint32_t pasid;
 };
 
+/* bus/devfn is PCI device's real BDF not the aliased one */
+struct vtd_hiod_key {
+    PCIBus *bus;
+    uint8_t devfn;
+};
+
 struct vtd_iotlb_key {
     uint64_t gfn;
     uint32_t pasid;
@@ -250,6 +256,25 @@ static guint vtd_as_hash(gconstpointer v)
     return (guint)(value << 8 | key->devfn);
 }
 
+/* Same implementation as vtd_as_hash() */
+static guint vtd_hiod_hash(gconstpointer v)
+{
+    return vtd_as_hash(v);
+}
+
+static gboolean vtd_hiod_equal(gconstpointer v1, gconstpointer v2)
+{
+    const struct vtd_hiod_key *key1 = v1;
+    const struct vtd_hiod_key *key2 = v2;
+
+    return (key1->bus == key2->bus) && (key1->devfn == key2->devfn);
+}
+
+static void vtd_hiod_destroy(gpointer v)
+{
+    object_unref(v);
+}
+
 static gboolean vtd_hash_remove_by_domain(gpointer key, gpointer value,
                                           gpointer user_data)
 {
@@ -3812,6 +3837,58 @@ VTDAddressSpace *vtd_find_add_as(IntelIOMMUState *s, PCIBus *bus,
     return vtd_dev_as;
 }
 
+static bool vtd_dev_set_iommu_device(PCIBus *bus, void *opaque, int devfn,
+                                     HostIOMMUDevice *hiod, Error **errp)
+{
+    IntelIOMMUState *s = opaque;
+    struct vtd_as_key key = {
+        .bus = bus,
+        .devfn = devfn,
+    };
+    struct vtd_as_key *new_key;
+
+    assert(hiod);
+
+    vtd_iommu_lock(s);
+
+    if (g_hash_table_lookup(s->vtd_host_iommu_dev, &key)) {
+        error_setg(errp, "Host IOMMU device already exist");
+        vtd_iommu_unlock(s);
+        return false;
+    }
+
+    new_key = g_malloc(sizeof(*new_key));
+    new_key->bus = bus;
+    new_key->devfn = devfn;
+
+    object_ref(hiod);
+    g_hash_table_insert(s->vtd_host_iommu_dev, new_key, hiod);
+
+    vtd_iommu_unlock(s);
+
+    return true;
+}
+
+static void vtd_dev_unset_iommu_device(PCIBus *bus, void *opaque, int devfn)
+{
+    IntelIOMMUState *s = opaque;
+    struct vtd_as_key key = {
+        .bus = bus,
+        .devfn = devfn,
+    };
+
+    vtd_iommu_lock(s);
+
+    if (!g_hash_table_lookup(s->vtd_host_iommu_dev, &key)) {
+        vtd_iommu_unlock(s);
+        return;
+    }
+
+    g_hash_table_remove(s->vtd_host_iommu_dev, &key);
+
+    vtd_iommu_unlock(s);
+}
+
 /* Unmap the whole range in the notifier's scope. */
 static void vtd_address_space_unmap(VTDAddressSpace *as, IOMMUNotifier *n)
 {
@@ -4116,6 +4193,8 @@ static AddressSpace *vtd_host_dma_iommu(PCIBus *bus, void *opaque, int devfn)
 
 static PCIIOMMUOps vtd_iommu_ops = {
     .get_address_space = vtd_host_dma_iommu,
+    .set_iommu_device = vtd_dev_set_iommu_device,
+    .unset_iommu_device = vtd_dev_unset_iommu_device,
 };
 
 static bool vtd_decide_config(IntelIOMMUState *s, Error **errp)
@@ -4235,6 +4314,8 @@ static void vtd_realize(DeviceState *dev, Error **errp)
                                      g_free, g_free);
     s->vtd_address_spaces = g_hash_table_new_full(vtd_as_hash, vtd_as_equal,
                                       g_free, g_free);
+    s->vtd_host_iommu_dev = g_hash_table_new_full(vtd_hiod_hash, vtd_hiod_equal,
+                                                  g_free, vtd_hiod_destroy);
     vtd_init(s);
     pci_setup_iommu(bus, &vtd_iommu_ops, dev);
     /* Pseudo address space under root PCI bus. */