Add support for ROCm (Radeon Open Compute) capability in virtio-gpu.
This enables GPU compute workloads using AMD's ROCm platform through
the virtio-gpu interface.

Changes include:
- Add "rocm" property to virtio-gpu-gl device
- Define VIRTIO_GPU_FLAG_ROCM_ENABLED flag
- Enable VIRGL_RENDERER_USE_ROCM flag when ROCm is enabled
- Add virtio_gpu_rocm_enabled() helper macro

This allows guests to detect and utilize ROCm capabilities through
the virtio-gpu device when the feature is enabled.

Signed-off-by: Honglei Huang <honghuan@amd.com>
Reviewed-by: Akihiko Odaki <odaki@rsg.ci.i.u-tokyo.ac.jp>
---
 hw/display/virtio-gpu-gl.c     |  2 ++
 hw/display/virtio-gpu-virgl.c  | 12 ++++++++++++
 include/hw/virtio/virtio-gpu.h |  3 +++
 3 files changed, 17 insertions(+)

diff --git a/hw/display/virtio-gpu-gl.c b/hw/display/virtio-gpu-gl.c
index b98ef2ef98..f059bcb177 100644
--- a/hw/display/virtio-gpu-gl.c
+++ b/hw/display/virtio-gpu-gl.c
@@ -159,6 +159,8 @@ static const Property virtio_gpu_gl_properties[] = {
                     VIRTIO_GPU_FLAG_STATS_ENABLED, false),
     DEFINE_PROP_BIT("venus", VirtIOGPU, parent_obj.conf.flags,
                     VIRTIO_GPU_FLAG_VENUS_ENABLED, false),
+    DEFINE_PROP_BIT("rocm", VirtIOGPU, parent_obj.conf.flags,
+                    VIRTIO_GPU_FLAG_ROCM_ENABLED, false),
 };
 
 static void virtio_gpu_gl_device_unrealize(DeviceState *qdev)
diff --git a/hw/display/virtio-gpu-virgl.c b/hw/display/virtio-gpu-virgl.c
index cbfb8aca3f..5e0f465c37 100644
--- a/hw/display/virtio-gpu-virgl.c
+++ b/hw/display/virtio-gpu-virgl.c
@@ -1160,6 +1160,9 @@ int virtio_gpu_virgl_init(VirtIOGPU *g)
     if (virtio_gpu_venus_enabled(g->parent_obj.conf)) {
         flags |= VIRGL_RENDERER_VENUS | VIRGL_RENDERER_RENDER_SERVER;
     }
+    if (virtio_gpu_rocm_enabled(g->parent_obj.conf)) {
+        flags |= (VIRGL_RENDERER_USE_ROCM);
+    }
 #endif
 
     ret = virgl_renderer_init(g, flags, &virtio_gpu_3d_cbs);
@@ -1218,5 +1221,14 @@ GArray *virtio_gpu_virgl_get_capsets(VirtIOGPU *g)
         }
     }
 
+    if (virtio_gpu_rocm_enabled(g->parent_obj.conf)) {
+        virgl_renderer_get_cap_set(VIRTIO_GPU_CAPSET_ROCM,
+                                   &capset_max_ver,
+                                   &capset_max_size);
+        if (capset_max_size) {
+            virtio_gpu_virgl_add_capset(capset_ids, VIRTIO_GPU_CAPSET_ROCM);
+        }
+    }
+
     return capset_ids;
 }
diff --git a/include/hw/virtio/virtio-gpu.h b/include/hw/virtio/virtio-gpu.h
index 58e0f91fda..9923970ece 100644
--- a/include/hw/virtio/virtio-gpu.h
+++ b/include/hw/virtio/virtio-gpu.h
@@ -100,6 +100,7 @@ enum virtio_gpu_base_conf_flags {
     VIRTIO_GPU_FLAG_RUTABAGA_ENABLED,
     VIRTIO_GPU_FLAG_VENUS_ENABLED,
     VIRTIO_GPU_FLAG_RESOURCE_UUID_ENABLED,
+    VIRTIO_GPU_FLAG_ROCM_ENABLED,
 };
 
 #define virtio_gpu_virgl_enabled(_cfg) \
@@ -122,6 +123,8 @@ enum virtio_gpu_base_conf_flags {
     (_cfg.hostmem > 0)
 #define virtio_gpu_venus_enabled(_cfg) \
     (_cfg.flags & (1 << VIRTIO_GPU_FLAG_VENUS_ENABLED))
+#define virtio_gpu_rocm_enabled(_cfg) \
+    (_cfg.flags & (1 << VIRTIO_GPU_FLAG_ROCM_ENABLED))
 
 struct virtio_gpu_base_conf {
     uint32_t max_outputs;
-- 
2.34.1