On Wed, Mar 05, 2014 at 09:24:34AM +0000, Chris Wilson wrote: > On Tue, Mar 04, 2014 at 09:38:56AM -0800, Ben Widawsky wrote: > > The actual post sync op is "Write Immediate Data QWord." It is therefore > > arguable that we should have always done a qword write. > > Not really since the spec explicitly says that we can choose either a > dword or qword write. Note that qword writes also currently require a > 64 byte alignment. Yeah, that's also my reading of the spec - the lenght field selects whether the hw does a qword or dword write, and the qword needs to be specially aligned. -Daniel -- Daniel Vetter Software Engineer, Intel Corporation +41 (0) 79 365 57 48 - http://blog.ffwll.ch _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/intel-gfx
