[Intel-gfx] [RFC 00/22] Gen7 batch buffer command parser

[Chris Wilson]

On Tue, Nov 26, 2013 at 08:51:17AM -0800, bradley.d.volkin at intel.com wrote:
> From: Brad Volkin <bradley.d.volkin at intel.com>
> 
> Certain OpenGL features (e.g. transform feedback, performance monitoring)
> require userspace code to submit batches containing commands such as
> MI_LOAD_REGISTER_IMM to access various registers. Unfortunately, some
> generations of the hardware will noop these commands in "unsecure" batches
> (which includes all userspace batches submitted via i915) even though the
> commands may be safe and represent the intended programming model of the device.
> 
> This series introduces a software command parser similar in operation to the
> command parsing done in hardware for unsecure batches. However, the software
> parser allows some operations that would be noop'd by hardware, if the parser
> determines the operation is safe, and submits the batch as "secure" to prevent
> hardware parsing. Currently the series implements this on IVB and HSW.

Just one more question... Do you have a branch for people to test?
-Chris

-- 
Chris Wilson, Intel Open Source Technology Centre