[8.1 regression] Re: [PULL 05/19] virtio-gpu-udmabuf: correct naming of QemuDmaBuf size properties

[Alex Williamson]

This commit introduces a regression when using GVT-g with the display
and ramfb options.  At the point where it appears the guest is switching
from ramfb to the vGPU display, the display goes black and QEMU reports:

qemu: eglCreateImageKHR failed

This message occurs repeatedly.

VM command line:

/usr/local/bin/qemu-system-x86_64 \
-M pc \
-machine kernel_irqchip=on \
-accel kvm \
-cpu host \
-m 6G \
-smp 4,sockets=1,dies=1,cores=4,threads=1 \
-smbios 'type=0,vendor=HP,version=P02 Ver. 02.44,date=09/13/2022,release=2.44' \
-smbios 'type=1,manufacturer=HP,product=HP ProDesk 600 G3 
MT,serial=MXL745130H,sku=Y3E02AV,family=103C_53307F HP ProDesk' \
-smbios 'type=2,manufacturer=HP,product=829D,version=KBC Version 
06.29,serial=PFYUT0FCY9731K' \
-smbios type=3,manufacturer=HP,serial=MXL745130H,asset=MXL745130H \
-acpitable sig=SLIC,file=/var/lib/libvirt/images/slic.bin \
-acpitable sig=MSDM,file=/var/lib/libvirt/images/msdm.bin \
-global PIIX4_PM.disable_s3=1 \
-global PIIX4_PM.disable_s4=1 \
-rtc base=localtime,driftfix=slew \
-global kvm-pit.lost_tick_policy=delay \
-no-user-config \
-nodefaults \
-monitor stdio \
-serial none \
-parallel none \
-no-hpet \
-net nic,macaddr=5c:25:8e:a6:34:6e,model=virtio \
-net user \
-usb \
-usbdevice tablet \
-vga none \
-display gtk,gl=on \
-hda /var/lib/libvirt/images/win10-gvtg.qcow2 \
-device 
vfio-pci-nohotplug,sysfsdev=/sys/bus/mdev/devices/b1338b2d-a709-4c23-b766-cc436c36cdf0,display=on,ramfb=on,x-igd-opregion=on
 \
-snapshot

Thanks,
Alex

On Mon, 17 Jul 2023 16:45:30 +0400
marcandre.lureau@redhat.com wrote:

> From: Dongwon Kim <dongwon.kim@intel.com>
> 
> Replace 'width' and 'height' in QemuDmaBuf with 'backing_widht'
> and 'backing_height' as these commonly indicate the size of the
> whole surface (e.g. guest's Xorg extended display). Then use
> 'width' and 'height' for sub region in there (e.g. guest's
> scanouts).
> 
> Cc: Gerd Hoffmann <kraxel@redhat.com>
> Cc: Marc-André Lureau <marcandre.lureau@redhat.com>
> Cc: Vivek Kasireddy <vivek.kasireddy@intel.com>
> Signed-off-by: Dongwon Kim <dongwon.kim@intel.com>
> Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
> Message-ID: <20230713040444.32267-1-dongwon.kim@intel.com>
> ---
>  include/ui/console.h            |  4 ++--
>  hw/display/virtio-gpu-udmabuf.c | 12 ++++++------
>  ui/dbus-listener.c              |  8 ++++----
>  ui/egl-helpers.c                |  8 ++++----
>  ui/gtk-egl.c                    | 10 ++++++----
>  ui/gtk-gl-area.c                |  7 ++++---
>  6 files changed, 26 insertions(+), 23 deletions(-)
> 
> diff --git a/include/ui/console.h b/include/ui/console.h
> index f27b2aad4f..3e8b22d6c6 100644
> --- a/include/ui/console.h
> +++ b/include/ui/console.h
> @@ -201,8 +201,8 @@ typedef struct QemuDmaBuf {
>      uint32_t  texture;
>      uint32_t  x;
>      uint32_t  y;
> -    uint32_t  scanout_width;
> -    uint32_t  scanout_height;
> +    uint32_t  backing_width;
> +    uint32_t  backing_height;
>      bool      y0_top;
>      void      *sync;
>      int       fence_fd;
> diff --git a/hw/display/virtio-gpu-udmabuf.c b/hw/display/virtio-gpu-udmabuf.c
> index ef1a740de5..d51184d658 100644
> --- a/hw/display/virtio-gpu-udmabuf.c
> +++ b/hw/display/virtio-gpu-udmabuf.c
> @@ -181,13 +181,13 @@ static VGPUDMABuf
>      }
>  
>      dmabuf = g_new0(VGPUDMABuf, 1);
> -    dmabuf->buf.width = fb->width;
> -    dmabuf->buf.height = fb->height;
> +    dmabuf->buf.width = r->width;
> +    dmabuf->buf.height = r->height;
>      dmabuf->buf.stride = fb->stride;
>      dmabuf->buf.x = r->x;
>      dmabuf->buf.y = r->y;
> -    dmabuf->buf.scanout_width = r->width;
> -    dmabuf->buf.scanout_height = r->height;
> +    dmabuf->buf.backing_width = fb->width;
> +    dmabuf->buf.backing_height = fb->height;
>      dmabuf->buf.fourcc = qemu_pixman_to_drm_format(fb->format);
>      dmabuf->buf.fd = res->dmabuf_fd;
>      dmabuf->buf.allow_fences = true;
> @@ -218,8 +218,8 @@ int virtio_gpu_update_dmabuf(VirtIOGPU *g,
>  
>      g->dmabuf.primary[scanout_id] = new_primary;
>      qemu_console_resize(scanout->con,
> -                        new_primary->buf.scanout_width,
> -                        new_primary->buf.scanout_height);
> +                        new_primary->buf.width,
> +                        new_primary->buf.height);
>      dpy_gl_scanout_dmabuf(scanout->con, &new_primary->buf);
>  
>      if (old_primary) {
> diff --git a/ui/dbus-listener.c b/ui/dbus-listener.c
> index 0240c39510..68ff343799 100644
> --- a/ui/dbus-listener.c
> +++ b/ui/dbus-listener.c
> @@ -415,13 +415,13 @@ static void dbus_scanout_texture(DisplayChangeListener 
> *dcl,
>                                 backing_width, backing_height, x, y, w, h);
>  #ifdef CONFIG_GBM
>      QemuDmaBuf dmabuf = {
> -        .width = backing_width,
> -        .height = backing_height,
> +        .width = w,
> +        .height = h,
>          .y0_top = backing_y_0_top,
>          .x = x,
>          .y = y,
> -        .scanout_width = w,
> -        .scanout_height = h,
> +        .backing_width = backing_width,
> +        .backing_height = backing_height,
>      };
>  
>      assert(tex_id);
> diff --git a/ui/egl-helpers.c b/ui/egl-helpers.c
> index 8f9fbf583e..3d19dbe382 100644
> --- a/ui/egl-helpers.c
> +++ b/ui/egl-helpers.c
> @@ -148,8 +148,8 @@ void egl_fb_blit(egl_fb *dst, egl_fb *src, bool flip)
>      if (src->dmabuf) {
>          x1 = src->dmabuf->x;
>          y1 = src->dmabuf->y;
> -        w = src->dmabuf->scanout_width;
> -        h = src->dmabuf->scanout_height;
> +        w = src->dmabuf->width;
> +        h = src->dmabuf->height;
>      }
>  
>      w = (x1 + w) > src->width ? src->width - x1 : w;
> @@ -314,9 +314,9 @@ void egl_dmabuf_import_texture(QemuDmaBuf *dmabuf)
>      }
>  
>      attrs[i++] = EGL_WIDTH;
> -    attrs[i++] = dmabuf->width;
> +    attrs[i++] = dmabuf->backing_width;
>      attrs[i++] = EGL_HEIGHT;
> -    attrs[i++] = dmabuf->height;
> +    attrs[i++] = dmabuf->backing_height;
>      attrs[i++] = EGL_LINUX_DRM_FOURCC_EXT;
>      attrs[i++] = dmabuf->fourcc;
>  
> diff --git a/ui/gtk-egl.c b/ui/gtk-egl.c
> index 42db1bb6cf..eee821d73a 100644
> --- a/ui/gtk-egl.c
> +++ b/ui/gtk-egl.c
> @@ -262,9 +262,10 @@ void gd_egl_scanout_dmabuf(DisplayChangeListener *dcl,
>      }
>  
>      gd_egl_scanout_texture(dcl, dmabuf->texture,
> -                           dmabuf->y0_top, dmabuf->width, dmabuf->height,
> -                           dmabuf->x, dmabuf->y, dmabuf->scanout_width,
> -                           dmabuf->scanout_height, NULL);
> +                           dmabuf->y0_top,
> +                           dmabuf->backing_width, dmabuf->backing_height,
> +                           dmabuf->x, dmabuf->y, dmabuf->width,
> +                           dmabuf->height, NULL);
>  
>      if (dmabuf->allow_fences) {
>          vc->gfx.guest_fb.dmabuf = dmabuf;
> @@ -284,7 +285,8 @@ void gd_egl_cursor_dmabuf(DisplayChangeListener *dcl,
>          if (!dmabuf->texture) {
>              return;
>          }
> -        egl_fb_setup_for_tex(&vc->gfx.cursor_fb, dmabuf->width, 
> dmabuf->height,
> +        egl_fb_setup_for_tex(&vc->gfx.cursor_fb,
> +                             dmabuf->backing_width, dmabuf->backing_height,
>                               dmabuf->texture, false);
>      } else {
>          egl_fb_destroy(&vc->gfx.cursor_fb);
> diff --git a/ui/gtk-gl-area.c b/ui/gtk-gl-area.c
> index a9a7fdf50c..4513d3d059 100644
> --- a/ui/gtk-gl-area.c
> +++ b/ui/gtk-gl-area.c
> @@ -301,9 +301,10 @@ void gd_gl_area_scanout_dmabuf(DisplayChangeListener 
> *dcl,
>      }
>  
>      gd_gl_area_scanout_texture(dcl, dmabuf->texture,
> -                               dmabuf->y0_top, dmabuf->width, dmabuf->height,
> -                               dmabuf->x, dmabuf->y, dmabuf->scanout_width,
> -                               dmabuf->scanout_height, NULL);
> +                               dmabuf->y0_top,
> +                               dmabuf->backing_width, dmabuf->backing_height,
> +                               dmabuf->x, dmabuf->y, dmabuf->width,
> +                               dmabuf->height, NULL);
>  
>      if (dmabuf->allow_fences) {
>          vc->gfx.guest_fb.dmabuf = dmabuf;