[Bug 78453] [HAWAII] Get acceleration working

https://bugs.freedesktop.org/show_bug.cgi?id=78453

--- Comment #75 from Michel Dänzer michel@daenzer.net --- (In reply to comment #74)

Ok, but how do I make sure that si_get_backend_mask() gets information from the kernel ?

By tracing its execution flow, either in gdb or by adding debugging printfs.

...

Also, might be worth testing with R600_DEBUG=nodma for now, to prevent the userspace code from using the asynchronous DMA engine.

Will do that.

Actually, that was a red herring, sorry; there's no asynchronous DMA support yet for CIK.

LLVM triggered Diagnostic Handler: unsupported call to function llvm.AMDGPU.rsq. in main

You need to update your LLVM SVN/Git snapshot.