DXVK allows running Direct 3D 11/10 3D games and application on Linux using Wine. To use DXVK you'll need Wine, the Vulkan library, as well as a Vulkan capable GPU.
The latest DXVK 1.0 adds an option to show the current D3D feature level in the DXVK HUD. This is especially useful if you're interesting in knowing the feature set supported for a particular Direct3D 10 game. This isn't particularly useful for D3D 11 games, since this will show 11_0 for almost all games. To see this information, export
DXVK_HUD=api
.