Microsoft is preparing to add the DirectX API support to WSL (Windows Subsystem for Linux).
The latest Windows Subsystem for Linux 2 will virtualize DirectX to Linux applications running on top of it.
WSL is a translation layer for Linux apps to run on top of Windows.
Unlike Wine, which attempts to translate Direct3D commands to OpenGL, what Microsoft is proposing is a real DirectX interface for apps in WSL, which can essentially talk to hardware (the host's kernel-mode GPU driver) directly.To this effect, Microsoft introduced the Linux-edition of DXGkrnl, a new kernel-mode driver for Linux that talks to the DXGkrnl driver of the Windows host.
Microsoft expects to release this feature-packed WSL out with WDDM 2.9 (so a future version of Windows 10).