Re: [QEMU PATCH v4 11/13] virtio-gpu: Support Venus capset

[Huang Rui <ray.huang@xxxxxxx>]

On Thu, Aug 31, 2023 at 06:43:17PM +0800, Akihiko Odaki wrote:
> On 2023/08/31 18:32, Huang Rui wrote:
> > From: Antonio Caggiano <antonio.caggiano@xxxxxxxxxxxxx>
> > 
> > Add support for the Venus capset, which enables Vulkan support through
> > the Venus Vulkan driver for virtio-gpu.
> > 
> > Signed-off-by: Antonio Caggiano <antonio.caggiano@xxxxxxxxxxxxx>
> > Signed-off-by: Huang Rui <ray.huang@xxxxxxx>
> > ---
> >   hw/display/virtio-gpu-virgl.c               | 21 +++++++++++++++++----
> >   include/standard-headers/linux/virtio_gpu.h |  2 ++
> >   2 files changed, 19 insertions(+), 4 deletions(-)
> > 
> > diff --git a/hw/display/virtio-gpu-virgl.c b/hw/display/virtio-gpu-virgl.c
> > index 1a996a08fc..83cd8c8fd0 100644
> > --- a/hw/display/virtio-gpu-virgl.c
> > +++ b/hw/display/virtio-gpu-virgl.c
> > @@ -437,6 +437,11 @@ static void virgl_cmd_get_capset_info(VirtIOGPU *g,
> >           virgl_renderer_get_cap_set(resp.capset_id,
> >                                      &resp.capset_max_version,
> >                                      &resp.capset_max_size);
> > +    } else if (info.capset_index == 2) {
> > +        resp.capset_id = VIRTIO_GPU_CAPSET_VENUS;
> > +        virgl_renderer_get_cap_set(resp.capset_id,
> > +                                   &resp.capset_max_version,
> > +                                   &resp.capset_max_size);
> >       } else {
> >           resp.capset_max_version = 0;
> >           resp.capset_max_size = 0;
> > @@ -901,10 +906,18 @@ int virtio_gpu_virgl_init(VirtIOGPU *g)
> >   
> >   int virtio_gpu_virgl_get_num_capsets(VirtIOGPU *g)
> >   {
> > -    uint32_t capset2_max_ver, capset2_max_size;
> > +    uint32_t capset2_max_ver, capset2_max_size, num_capsets;
> > +    num_capsets = 1;
> > +
> >       virgl_renderer_get_cap_set(VIRTIO_GPU_CAPSET_VIRGL2,
> > -                              &capset2_max_ver,
> > -                              &capset2_max_size);
> > +                               &capset2_max_ver,
> > +                               &capset2_max_size);
> > +    num_capsets += capset2_max_ver ? 1 : 0;
> > +
> > +    virgl_renderer_get_cap_set(VIRTIO_GPU_CAPSET_VENUS,
> > +                               &capset2_max_ver,
> > +                               &capset2_max_size);
> > +    num_capsets += capset2_max_size ? 1 : 0;
> >   
> > -    return capset2_max_ver ? 2 : 1;
> > +    return num_capsets;
> >   }
> > diff --git a/include/standard-headers/linux/virtio_gpu.h 
> > b/include/standard-headers/linux/virtio_gpu.h
> > index 2da48d3d4c..2db643ed8f 100644
> > --- a/include/standard-headers/linux/virtio_gpu.h
> > +++ b/include/standard-headers/linux/virtio_gpu.h
> > @@ -309,6 +309,8 @@ struct virtio_gpu_cmd_submit {
> >   
> >   #define VIRTIO_GPU_CAPSET_VIRGL 1
> >   #define VIRTIO_GPU_CAPSET_VIRGL2 2
> > +/* 3 is reserved for gfxstream */
> > +#define VIRTIO_GPU_CAPSET_VENUS 4
> 
> This file is synced with scripts/update-linux-headers.sh and should not 
> be modified.

Should I add marco in kernel include/uapi/linux/virtio_gpu.h?

They are used at VIRGL_RENDERER_UNSTABLE_APIS in virglrender.

enum virgl_renderer_capset {
   VIRGL_RENDERER_CAPSET_VIRGL                   = 1,
   VIRGL_RENDERER_CAPSET_VIRGL2                  = 2,
   /* 3 is reserved for gfxstream */
   VIRGL_RENDERER_CAPSET_VENUS                   = 4,
   /* 5 is reserved for cross-domain */
   VIRGL_RENDERER_CAPSET_DRM                     = 6,
};

Thanks,
Ray

> 
> >   
> >   /* VIRTIO_GPU_CMD_GET_CAPSET_INFO */
> >   struct virtio_gpu_get_capset_info {