[Qemu-devel] [PATCH v3 26/26] hw/display: add vhost-user-vga & gpu-pci

["Marc-André Lureau" <marcandre.lureau@redhat.com>]

Add new virtio-gpu devices with a "vhost-user" property. Tthe
associated vhost-user backend is used to handle the virtio rings and
provide rendering results thanks to the vhost-user-gpu protocol.

Example usage:
-object vhost-user-backend,id=vug,cmd="./vhost-user-gpu"
-device vhost-user-vga,vhost-user=vug

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
---
 hw/virtio/virtio-pci.h          |   1 +
 include/hw/virtio/virtio-gpu.h  |  13 +
 hw/display/vhost-user-gpu-pci.c |  51 ++++
 hw/display/vhost-user-gpu.c     | 488 ++++++++++++++++++++++++++++++++
 hw/display/vhost-user-vga.c     |  52 ++++
 vl.c                            |   1 +
 hw/display/Makefile.objs        |   3 +
 7 files changed, 609 insertions(+)
 create mode 100644 hw/display/vhost-user-gpu-pci.c
 create mode 100644 hw/display/vhost-user-gpu.c
 create mode 100644 hw/display/vhost-user-vga.c

diff --git a/hw/virtio/virtio-pci.h b/hw/virtio/virtio-pci.h
index 42240f47b3..ec8eeb2a93 100644
--- a/hw/virtio/virtio-pci.h
+++ b/hw/virtio/virtio-pci.h
@@ -56,6 +56,7 @@ typedef struct VirtIOInputHIDPCI VirtIOInputHIDPCI;
 typedef struct VirtIOInputHostPCI VirtIOInputHostPCI;
 typedef struct VHostUserInputPCI VHostUserInputPCI;
 typedef struct VirtIOGPUPCI VirtIOGPUPCI;
+typedef struct VhostUserGPUPCI VhostUserGPUPCI;
 typedef struct VHostVSockPCI VHostVSockPCI;
 typedef struct VirtIOCryptoPCI VirtIOCryptoPCI;
 
diff --git a/include/hw/virtio/virtio-gpu.h b/include/hw/virtio/virtio-gpu.h
index 4a17000ce4..c5648d426a 100644
--- a/include/hw/virtio/virtio-gpu.h
+++ b/include/hw/virtio/virtio-gpu.h
@@ -19,6 +19,7 @@
 #include "ui/console.h"
 #include "hw/virtio/virtio.h"
 #include "qemu/log.h"
+#include "sysemu/vhost-user-backend.h"
 
 #include "standard-headers/linux/virtio_gpu.h"
 
@@ -39,6 +40,8 @@
 #define VIRTIO_GPU(obj)                                        \
         OBJECT_CHECK(VirtIOGPU, (obj), TYPE_VIRTIO_GPU)
 
+#define TYPE_VHOST_USER_GPU "vhost-user-gpu"
+
 #define VIRTIO_ID_GPU 16
 
 struct virtio_gpu_simple_resource {
@@ -156,6 +159,16 @@ typedef struct VirtIOGPU {
     } stats;
 } VirtIOGPU;
 
+typedef struct VhostUserGPU {
+    VirtIOGPUBase parent_obj;
+
+    VhostUserBackend *vhost;
+    int vhost_gpu_fd; /* closed by the chardev */
+    CharBackend vhost_chr;
+    QemuDmaBuf dmabuf[VIRTIO_GPU_MAX_SCANOUTS];
+    bool backend_blocked;
+} VhostUserGPU;
+
 extern const GraphicHwOps virtio_gpu_ops;
 
 /* to share between PCI and VGA */
diff --git a/hw/display/vhost-user-gpu-pci.c b/hw/display/vhost-user-gpu-pci.c
new file mode 100644
index 0000000000..2eef4982a2
--- /dev/null
+++ b/hw/display/vhost-user-gpu-pci.c
@@ -0,0 +1,51 @@
+/*
+ * vhost-user GPU PCI device
+ *
+ * Copyright Red Hat, Inc. 2018
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or later.
+ * See the COPYING file in the top-level directory.
+ *
+ */
+
+#include "qemu/osdep.h"
+#include "qapi/error.h"
+#include "hw/virtio/virtio-pci.h"
+
+#define TYPE_VHOST_USER_GPU_PCI "vhost-user-gpu-pci"
+#define VHOST_USER_GPU_PCI(obj)                                     \
+    OBJECT_CHECK(VhostUserGPUPCI, (obj), TYPE_VHOST_USER_GPU_PCI)
+
+struct VhostUserGPUPCI {
+    VirtIOGPUPCIBase parent_obj;
+
+    VhostUserGPU vdev;
+};
+
+static void vhost_user_gpu_pci_initfn(Object *obj)
+{
+    VhostUserGPUPCI *dev = VHOST_USER_GPU_PCI(obj);
+
+    virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
+                                TYPE_VHOST_USER_GPU);
+
+    VIRTIO_GPU_PCI_BASE(obj)->vgpu = VIRTIO_GPU_BASE(&dev->vdev);
+
+    object_property_add_alias(obj, "vhost-user",
+                              OBJECT(&dev->vdev), "vhost-user",
+                              &error_abort);
+}
+
+static const TypeInfo vhost_user_gpu_pci_info = {
+    .name = TYPE_VHOST_USER_GPU_PCI,
+    .parent = TYPE_VIRTIO_GPU_PCI_BASE,
+    .instance_size = sizeof(VhostUserGPUPCI),
+    .instance_init = vhost_user_gpu_pci_initfn,
+};
+
+static void vhost_user_gpu_pci_register_types(void)
+{
+    type_register_static(&vhost_user_gpu_pci_info);
+}
+
+type_init(vhost_user_gpu_pci_register_types)
diff --git a/hw/display/vhost-user-gpu.c b/hw/display/vhost-user-gpu.c
new file mode 100644
index 0000000000..4ba5382b01
--- /dev/null
+++ b/hw/display/vhost-user-gpu.c
@@ -0,0 +1,488 @@
+/*
+ * vhost-user GPU Device
+ *
+ * Copyright Red Hat, Inc. 2018
+ *
+ * Authors:
+ *     Marc-André Lureau <marcandre.lureau@redhat.com>
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or later.
+ * See the COPYING file in the top-level directory.
+ */
+
+#include "qemu/osdep.h"
+#include "hw/virtio/virtio-gpu.h"
+#include "chardev/char-fe.h"
+#include "qapi/error.h"
+
+#define VHOST_USER_GPU(obj)                                    \
+    OBJECT_CHECK(VhostUserGPU, (obj), TYPE_VHOST_USER_GPU)
+
+typedef enum VhostUserGpuRequest {
+    VHOST_USER_GPU_NONE = 0,
+    VHOST_USER_GPU_GET_PROTOCOL_FEATURES,
+    VHOST_USER_GPU_SET_PROTOCOL_FEATURES,
+    VHOST_USER_GPU_GET_DISPLAY_INFO,
+    VHOST_USER_GPU_CURSOR_POS,
+    VHOST_USER_GPU_CURSOR_POS_HIDE,
+    VHOST_USER_GPU_CURSOR_UPDATE,
+    VHOST_USER_GPU_SCANOUT,
+    VHOST_USER_GPU_UPDATE,
+    VHOST_USER_GPU_DMABUF_SCANOUT,
+    VHOST_USER_GPU_DMABUF_UPDATE,
+} VhostUserGpuRequest;
+
+typedef struct VhostUserGpuDisplayInfoReply {
+    struct virtio_gpu_resp_display_info info;
+} VhostUserGpuDisplayInfoReply;
+
+typedef struct VhostUserGpuCursorPos {
+    uint32_t scanout_id;
+    uint32_t x;
+    uint32_t y;
+} QEMU_PACKED VhostUserGpuCursorPos;
+
+typedef struct VhostUserGpuCursorUpdate {
+    VhostUserGpuCursorPos pos;
+    uint32_t hot_x;
+    uint32_t hot_y;
+    uint32_t data[64 * 64];
+} QEMU_PACKED VhostUserGpuCursorUpdate;
+
+typedef struct VhostUserGpuScanout {
+    uint32_t scanout_id;
+    uint32_t width;
+    uint32_t height;
+} QEMU_PACKED VhostUserGpuScanout;
+
+typedef struct VhostUserGpuUpdate {
+    uint32_t scanout_id;
+    uint32_t x;
+    uint32_t y;
+    uint32_t width;
+    uint32_t height;
+    uint8_t data[];
+} QEMU_PACKED VhostUserGpuUpdate;
+
+typedef struct VhostUserGpuDMABUFScanout {
+    uint32_t scanout_id;
+    uint32_t x;
+    uint32_t y;
+    uint32_t width;
+    uint32_t height;
+    uint32_t fd_width;
+    uint32_t fd_height;
+    uint32_t fd_stride;
+    uint32_t fd_flags;
+    int fd_drm_fourcc;
+} QEMU_PACKED VhostUserGpuDMABUFScanout;
+
+typedef struct VhostUserGpuMsg {
+    uint32_t request; /* VhostUserGpuRequest */
+    uint32_t size; /* the following payload size */
+    union {
+        VhostUserGpuCursorPos cursor_pos;
+        VhostUserGpuCursorUpdate cursor_update;
+        VhostUserGpuScanout scanout;
+        VhostUserGpuUpdate update;
+        VhostUserGpuDMABUFScanout dmabuf_scanout;
+        uint64_t u64;
+    } payload;
+} QEMU_PACKED VhostUserGpuMsg;
+
+static VhostUserGpuMsg m __attribute__ ((unused));
+#define VHOST_USER_GPU_HDR_SIZE (sizeof(m.request) + sizeof(m.size))
+
+static void vhost_user_gpu_update_blocked(VhostUserGPU *g, bool blocked);
+
+static void
+vhost_user_gpu_handle_cursor(VhostUserGPU *g, VhostUserGpuMsg *msg)
+{
+    VhostUserGpuCursorPos *pos = &msg->payload.cursor_pos;
+    struct virtio_gpu_scanout *s;
+
+    if (pos->scanout_id >= g->parent_obj.conf.max_outputs) {
+        return;
+    }
+    s = &g->parent_obj.scanout[pos->scanout_id];
+
+    if (msg->request == VHOST_USER_GPU_CURSOR_UPDATE) {
+        VhostUserGpuCursorUpdate *up = &msg->payload.cursor_update;
+        if (!s->current_cursor) {
+            s->current_cursor = cursor_alloc(64, 64);
+        }
+
+        s->current_cursor->hot_x = up->hot_x;
+        s->current_cursor->hot_y = up->hot_y;
+
+        memcpy(s->current_cursor->data, up->data,
+               64 * 64 * sizeof(uint32_t));
+
+        dpy_cursor_define(s->con, s->current_cursor);
+    }
+
+    dpy_mouse_set(s->con, pos->x, pos->y,
+                  msg->request != VHOST_USER_GPU_CURSOR_POS_HIDE);
+}
+
+static void
+vhost_user_gpu_unblock(VhostUserGPU *g)
+{
+    uint32_t ok;
+
+    qemu_chr_fe_write(&g->vhost_chr, (uint8_t *)&ok, sizeof(ok));
+
+}
+static void
+vhost_user_gpu_handle_display(VhostUserGPU *g, VhostUserGpuMsg *msg)
+{
+    QemuConsole *con = NULL;
+    struct virtio_gpu_scanout *s;
+
+    switch (msg->request) {
+    case VHOST_USER_GPU_GET_PROTOCOL_FEATURES: {
+        uint64_t u64 = 0;
+        qemu_chr_fe_write(&g->vhost_chr, (uint8_t *)&u64, sizeof(u64));
+        break;
+    }
+    case VHOST_USER_GPU_SET_PROTOCOL_FEATURES: {
+        break;
+    }
+    case VHOST_USER_GPU_GET_DISPLAY_INFO: {
+        struct virtio_gpu_resp_display_info display_info = { 0, };
+        display_info.hdr.type = VIRTIO_GPU_RESP_OK_DISPLAY_INFO;
+        virtio_gpu_base_fill_display_info(VIRTIO_GPU_BASE(g), &display_info);
+        qemu_chr_fe_write(&g->vhost_chr,
+                          (uint8_t *)&display_info, sizeof(display_info));
+        break;
+    }
+    case VHOST_USER_GPU_SCANOUT: {
+        VhostUserGpuScanout *m = &msg->payload.scanout;
+
+        if (m->scanout_id >= g->parent_obj.conf.max_outputs) {
+            return;
+        }
+        s = &g->parent_obj.scanout[m->scanout_id];
+        con = s->con;
+
+        s->ds = qemu_create_displaysurface(m->width, m->height);
+        if (!s->ds) {
+            return;
+        }
+
+        dpy_gfx_replace_surface(con, s->ds);
+        break;
+    }
+    case VHOST_USER_GPU_DMABUF_SCANOUT: {
+        VhostUserGpuDMABUFScanout *m = &msg->payload.dmabuf_scanout;
+        int fd = qemu_chr_fe_get_msgfd(&g->vhost_chr);
+        QemuDmaBuf *dmabuf;
+
+        if (m->scanout_id >= g->parent_obj.conf.max_outputs) {
+            if (fd >= 0) {
+                close(fd);
+            }
+            break;
+        }
+
+        con = g->parent_obj.scanout[m->scanout_id].con;
+        dmabuf = &g->dmabuf[m->scanout_id];
+        if (g->parent_obj.enable && dmabuf->fd >= 0) {
+            close(dmabuf->fd);
+            dmabuf->fd = -1;
+        }
+        dpy_gl_release_dmabuf(con, dmabuf);
+        if (fd == -1) {
+            dpy_gl_scanout_disable(con);
+            break;
+        }
+        *dmabuf = (QemuDmaBuf) {
+            .fd = fd,
+            .width = m->fd_width,
+            .height = m->fd_height,
+            .stride = m->fd_stride,
+            .fourcc = m->fd_drm_fourcc,
+            .y0_top = m->fd_flags & VIRTIO_GPU_RESOURCE_FLAG_Y_0_TOP,
+        };
+        dpy_gl_scanout_dmabuf(con, dmabuf);
+        break;
+    }
+    case VHOST_USER_GPU_DMABUF_UPDATE: {
+        VhostUserGpuUpdate *m = &msg->payload.update;
+
+        if (m->scanout_id >= g->parent_obj.conf.max_outputs ||
+            !g->parent_obj.scanout[m->scanout_id].con) {
+            error_report("invalid scanout update: %d", m->scanout_id);
+            vhost_user_gpu_unblock(g);
+            break;
+        }
+
+        con = g->parent_obj.scanout[m->scanout_id].con;
+        dpy_gl_update(con, m->x, m->y, m->width, m->height);
+        g->backend_blocked = true;
+        break;
+    }
+    case VHOST_USER_GPU_UPDATE: {
+        VhostUserGpuUpdate *m = &msg->payload.update;
+
+        if (m->scanout_id >= g->parent_obj.conf.max_outputs) {
+            break;
+        }
+        s = &g->parent_obj.scanout[m->scanout_id];
+        con = s->con;
+        pixman_image_t *image =
+            pixman_image_create_bits(PIXMAN_x8r8g8b8,
+                                     m->width,
+                                     m->height,
+                                     (uint32_t *)m->data,
+                                     m->width * 4);
+
+        pixman_image_composite(PIXMAN_OP_SRC,
+                               image, NULL, s->ds->image,
+                               0, 0, 0, 0, m->x, m->y, m->width, m->height);
+
+        pixman_image_unref(image);
+        dpy_gfx_update(con, m->x, m->y, m->width, m->height);
+        break;
+    }
+    default:
+        g_warning("unhandled message %d %d", msg->request, msg->size);
+    }
+
+    if (con && qemu_console_is_gl_blocked(con)) {
+        vhost_user_gpu_update_blocked(g, true);
+    }
+}
+
+static void
+vhost_user_gpu_chr_read(void *opaque)
+{
+    VhostUserGPU *g = opaque;
+    VhostUserGpuMsg *msg = NULL;
+    VhostUserGpuRequest request;
+    uint32_t size;
+    int r;
+
+    r = qemu_chr_fe_read_all(&g->vhost_chr,
+                             (uint8_t *)&request, sizeof(uint32_t));
+    if (r != sizeof(uint32_t)) {
+        error_report("failed to read msg header: %d, %d", r, errno);
+        goto end;
+    }
+
+    r = qemu_chr_fe_read_all(&g->vhost_chr,
+                             (uint8_t *)&size, sizeof(uint32_t));
+    if (r != sizeof(uint32_t)) {
+        error_report("failed to read msg size");
+        goto end;
+    }
+
+    msg = g_malloc(VHOST_USER_GPU_HDR_SIZE + size);
+    g_return_if_fail(msg != NULL);
+
+    r = qemu_chr_fe_read_all(&g->vhost_chr,
+                             (uint8_t *)&msg->payload, size);
+    if (r != size) {
+        error_report("failed to read msg payload %d != %d", r, size);
+        goto end;
+    }
+
+    msg->request = request;
+    msg->size = size;
+
+    if (request == VHOST_USER_GPU_CURSOR_UPDATE ||
+        request == VHOST_USER_GPU_CURSOR_POS ||
+        request == VHOST_USER_GPU_CURSOR_POS_HIDE) {
+        vhost_user_gpu_handle_cursor(g, msg);
+    } else {
+        vhost_user_gpu_handle_display(g, msg);
+    }
+
+end:
+    g_free(msg);
+}
+
+static void
+vhost_user_gpu_update_blocked(VhostUserGPU *g, bool blocked)
+{
+    qemu_set_fd_handler(g->vhost_gpu_fd,
+                        blocked ? NULL : vhost_user_gpu_chr_read, NULL, g);
+}
+
+static void
+vhost_user_gpu_gl_unblock(VirtIOGPUBase *b)
+{
+    VhostUserGPU *g = VHOST_USER_GPU(b);
+
+    if (g->backend_blocked) {
+        vhost_user_gpu_unblock(VHOST_USER_GPU(g));
+        g->backend_blocked = false;
+    }
+
+    vhost_user_gpu_update_blocked(VHOST_USER_GPU(g), false);
+}
+
+static void
+vhost_user_gpu_set_status(VirtIODevice *vdev, uint8_t val)
+{
+    VhostUserGPU *g = VHOST_USER_GPU(vdev);
+
+    if (val & VIRTIO_CONFIG_S_DRIVER_OK && vdev->vm_running) {
+        vhost_user_backend_start(g->vhost);
+    } else {
+        /* TODO: forcefully gl unblock ? */
+        vhost_user_backend_stop(g->vhost);
+    }
+}
+
+static bool
+vhost_user_gpu_guest_notifier_pending(VirtIODevice *vdev, int idx)
+{
+    VhostUserGPU *g = VHOST_USER_GPU(vdev);
+
+    return vhost_virtqueue_pending(&g->vhost->dev, idx);
+}
+
+static void
+vhost_user_gpu_guest_notifier_mask(VirtIODevice *vdev, int idx, bool mask)
+{
+    VhostUserGPU *g = VHOST_USER_GPU(vdev);
+
+    vhost_virtqueue_mask(&g->vhost->dev, vdev, idx, mask);
+}
+
+static void
+vhost_user_gpu_is_busy(const Object *obj, const char *name,
+                       Object *val, Error **errp)
+{
+    VhostUserGPU *g = VHOST_USER_GPU(obj);
+
+    if (g->vhost) {
+        error_setg(errp, "can't use already busy vhost-user");
+    } else {
+        qdev_prop_allow_set_link_before_realize(obj, name, val, errp);
+    }
+}
+
+static void
+vhost_user_gpu_instance_init(Object *obj)
+{
+    VhostUserGPU *g = VHOST_USER_GPU(obj);
+
+    object_property_add_link(obj, "vhost-user", TYPE_VHOST_USER_BACKEND,
+                             (Object **)&g->vhost,
+                             vhost_user_gpu_is_busy,
+                             OBJ_PROP_LINK_STRONG,
+                             &error_abort);
+}
+
+static void
+vhost_user_gpu_reset(VirtIODevice *vdev)
+{
+    VhostUserGPU *g = VHOST_USER_GPU(vdev);
+
+    virtio_gpu_base_reset(VIRTIO_GPU_BASE(vdev));
+
+    vhost_user_backend_stop(g->vhost);
+}
+
+static void
+vhost_user_gpu_device_realize(DeviceState *qdev, Error **errp)
+{
+    VhostUserGPU *g = VHOST_USER_GPU(qdev);
+    VirtIODevice *vdev = VIRTIO_DEVICE(g);
+    Chardev *chr;
+    int sv[2];
+    uint32_t num_capsets;
+
+    if (!g->vhost) {
+        error_setg(errp, "'vhost-user' property is required");
+        return;
+    }
+
+    if (vhost_user_backend_dev_init(g->vhost, vdev, 2, errp) < 0) {
+        return;
+    }
+
+    if (virtio_has_feature(g->vhost->dev.features, VIRTIO_GPU_F_VIRGL)) {
+        g->parent_obj.conf.flags |= 1 << VIRTIO_GPU_FLAG_VIRGL_ENABLED;
+    }
+
+    if (vhost_user_gpu_get_num_capsets(&g->vhost->dev, &num_capsets) < 0) {
+        error_setg(errp, "Failed to get num-capsets");
+        return;
+    }
+
+    if (!virtio_gpu_base_device_realize(qdev, num_capsets, NULL, NULL, errp)) {
+        return;
+    }
+
+    if (socketpair(PF_UNIX, SOCK_STREAM, 0, sv) == -1) {
+        error_setg_errno(errp, errno, "socketpair() failed");
+        return;
+    }
+
+    chr = CHARDEV(object_new(TYPE_CHARDEV_SOCKET));
+    if (!chr || qemu_chr_add_client(chr, sv[0]) == -1) {
+        error_setg(errp, "Failed to make socket chardev");
+        goto err;
+    }
+    if (!qemu_chr_fe_init(&g->vhost_chr, chr, errp)) {
+        goto err;
+    }
+    if (vhost_user_gpu_set_socket(&g->vhost->dev, sv[1]) < 0) {
+        error_setg(errp, "Failed to set vhost-user-gpu socket");
+        goto err;
+    }
+
+    g->vhost_gpu_fd = sv[0];
+    vhost_user_gpu_update_blocked(g, false);
+    close(sv[1]);
+    return;
+
+err:
+    close(sv[0]);
+    close(sv[1]);
+    if (chr) {
+        object_unref(OBJECT(chr));
+    }
+}
+
+static Property vhost_user_gpu_properties[] = {
+    VIRTIO_GPU_BASE_PROPERTIES(VhostUserGPU, parent_obj.conf),
+    DEFINE_PROP_END_OF_LIST(),
+};
+
+static void
+vhost_user_gpu_class_init(ObjectClass *klass, void *data)
+{
+    DeviceClass *dc = DEVICE_CLASS(klass);
+    VirtioDeviceClass *vdc = VIRTIO_DEVICE_CLASS(klass);
+    VirtIOGPUBaseClass *vgc = VIRTIO_GPU_BASE_CLASS(klass);
+
+    vgc->gl_unblock = vhost_user_gpu_gl_unblock;
+
+    vdc->realize = vhost_user_gpu_device_realize;
+    vdc->reset = vhost_user_gpu_reset;
+    vdc->set_status   = vhost_user_gpu_set_status;
+    vdc->guest_notifier_mask = vhost_user_gpu_guest_notifier_mask;
+    vdc->guest_notifier_pending = vhost_user_gpu_guest_notifier_pending;
+    vdc->reset = vhost_user_gpu_reset;
+
+    dc->props = vhost_user_gpu_properties;
+}
+
+static const TypeInfo vhost_user_gpu_info = {
+    .name = TYPE_VHOST_USER_GPU,
+    .parent = TYPE_VIRTIO_GPU_BASE,
+    .instance_size = sizeof(VhostUserGPU),
+    .instance_init = vhost_user_gpu_instance_init,
+    .class_init = vhost_user_gpu_class_init,
+};
+
+static void vhost_user_gpu_register_types(void)
+{
+    type_register_static(&vhost_user_gpu_info);
+}
+
+type_init(vhost_user_gpu_register_types)
diff --git a/hw/display/vhost-user-vga.c b/hw/display/vhost-user-vga.c
new file mode 100644
index 0000000000..0dec0c3d71
--- /dev/null
+++ b/hw/display/vhost-user-vga.c
@@ -0,0 +1,52 @@
+/*
+ * vhost-user VGA device
+ *
+ * Copyright Red Hat, Inc. 2018
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or later.
+ * See the COPYING file in the top-level directory.
+ *
+ */
+
+#include "qemu/osdep.h"
+#include "qapi/error.h"
+#include "virtio-vga.h"
+
+#define TYPE_VHOST_USER_VGA "vhost-user-vga"
+
+#define VHOST_USER_VGA(obj)                                \
+    OBJECT_CHECK(VhostUserVGA, (obj), TYPE_VHOST_USER_VGA)
+
+typedef struct VhostUserVGA {
+    VirtIOVGABase parent_obj;
+
+    VhostUserGPU vdev;
+} VhostUserVGA;
+
+static void vhost_user_vga_inst_initfn(Object *obj)
+{
+    VhostUserVGA *dev = VHOST_USER_VGA(obj);
+
+    virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
+                                TYPE_VHOST_USER_GPU);
+
+    VIRTIO_VGA_BASE(dev)->vgpu = VIRTIO_GPU_BASE(&dev->vdev);
+
+    object_property_add_alias(obj, "vhost-user",
+                              OBJECT(&dev->vdev), "vhost-user",
+                              &error_abort);
+}
+
+static TypeInfo vhost_user_vga_info = {
+    .name          = TYPE_VHOST_USER_VGA,
+    .parent        = TYPE_VIRTIO_VGA_BASE,
+    .instance_size = sizeof(struct VhostUserVGA),
+    .instance_init = vhost_user_vga_inst_initfn,
+};
+
+static void vhost_user_vga_register_types(void)
+{
+    type_register_static(&vhost_user_vga_info);
+}
+
+type_init(vhost_user_vga_register_types)
diff --git a/vl.c b/vl.c
index 1c21339ba7..3f620f56a7 100644
--- a/vl.c
+++ b/vl.c
@@ -235,6 +235,7 @@ static struct {
     { .driver = "vmware-svga",          .flag = &default_vga       },
     { .driver = "qxl-vga",              .flag = &default_vga       },
     { .driver = "virtio-vga",           .flag = &default_vga       },
+    { .driver = "vhost-user-vga",       .flag = &default_vga       },
 };
 
 static QemuOptsList qemu_rtc_opts = {
diff --git a/hw/display/Makefile.objs b/hw/display/Makefile.objs
index d1d2711475..a98328d692 100644
--- a/hw/display/Makefile.objs
+++ b/hw/display/Makefile.objs
@@ -37,8 +37,11 @@ obj-$(CONFIG_VGA) += vga.o
 common-obj-$(CONFIG_QXL) += qxl.o qxl-logger.o qxl-render.o
 
 obj-$(CONFIG_VIRTIO_GPU) += virtio-gpu-base.o virtio-gpu.o virtio-gpu-3d.o
+obj-$(call land,$(CONFIG_VIRTIO_GPU),$(CONFIG_VHOST_USER)) += vhost-user-gpu.o
 obj-$(call land,$(CONFIG_VIRTIO_GPU),$(CONFIG_VIRTIO_PCI)) += virtio-gpu-pci.o
+obj-$(call land,$(CONFIG_VHOST_USER),$(call land,$(CONFIG_VIRTIO_GPU),$(CONFIG_VIRTIO_PCI))) += vhost-user-gpu-pci.o
 obj-$(CONFIG_VIRTIO_VGA) += virtio-vga.o
+obj-$(call land,$(CONFIG_VIRTIO_VGA),$(CONFIG_VHOST_USER)) += vhost-user-vga.o
 virtio-gpu.o-cflags := $(VIRGL_CFLAGS)
 virtio-gpu.o-libs += $(VIRGL_LIBS)
 virtio-gpu-3d.o-cflags := $(VIRGL_CFLAGS)
-- 
2.18.0.rc1