LibVirtGPU: Create and initialize device from file descriptor

Author: https://github.com/sunverwerth
Commit: 086c7c4c88
Pull-request: https://github.com/SerenityOS/serenity/pull/16590
Reviewed-by: https://github.com/ADKaster
Reviewed-by: https://github.com/ccapitalK
Reviewed-by: https://github.com/gmta ✅
Reviewed-by: https://github.com/supercomputer7 ✅

Userland/Libraries/LibVirtGPU/Device.cpp

@@ -11,9 +11,16 @@
 
 namespace VirtGPU {
 
+Device::Device(NonnullRefPtr<Core::File> gpu_file)
+    : m_gpu_file { gpu_file }
+{
+}
+
 ErrorOr<NonnullOwnPtr<Device>> Device::create(Gfx::IntSize)
 {
-    return make<Device>();
+    auto file = TRY(Core::File::open("/dev/gpu/render0", Core::OpenMode::ReadWrite));
+    auto device = make<Device>(file);
+    return device;
 }
 
 GPU::DeviceInfo Device::info() const