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  =====================
  MSM Crash Dump Format
  =====================
  
  Following a GPU hang the MSM driver outputs debugging information via
  /sys/kernel/dri/X/show or via devcoredump (/sys/class/devcoredump/dcdX/data).
  This document describes how the output is formatted.
  
  Each entry is in the form key: value. Sections headers will not have a value
  and all the contents of a section will be indented two spaces from the header.
  Each section might have multiple array entries the start of which is designated
  by a (-).
  
  Mappings
  --------
  
  kernel
  	The kernel version that generated the dump (UTS_RELEASE).
  
  module
  	The module that generated the crashdump.
  
  time
  	The kernel time at crash formated as seconds.microseconds.
  
  comm
  	Comm string for the binary that generated the fault.
  
  cmdline
  	Command line for the binary that generated the fault.
  
  revision
  	ID of the GPU that generated the crash formatted as
  	core.major.minor.patchlevel separated by dots.
  
  rbbm-status
  	The current value of RBBM_STATUS which shows what top level GPU
  	components are in use at the time of crash.
  
  ringbuffer
  	Section containing the contents of each ringbuffer. Each ringbuffer is
  	identified with an id number.
  
  	id
  		Ringbuffer ID (0 based index).  Each ringbuffer in the section
  		will have its own unique id.
  	iova
  		GPU address of the ringbuffer.
  
  	last-fence
  		The last fence that was issued on the ringbuffer
  
  	retired-fence
  		The last fence retired on the ringbuffer.
  
  	rptr
  		The current read pointer (rptr) for the ringbuffer.
  
  	wptr
  		The current write pointer (wptr) for the ringbuffer.

  	size
  		Maximum size of the ringbuffer programmed in the hardware.
  
  	data
  		The contents of the ring encoded as ascii85.  Only the used
  		portions of the ring will be printed.

  bo
  	List of buffers from the hanging submission if available.
  	Each buffer object will have a uinque iova.
  
  	iova
  		GPU address of the buffer object.
  
  	size
  		Allocated size of the buffer object.
  
  	data
  		The contents of the buffer object encoded with ascii85.  Only
  		Trailing zeros at the end of the buffer will be skipped.

  registers
  	Set of registers values. Each entry is on its own line enclosed
  	by brackets { }.
  
  	offset
  		Byte offset of the register from the start of the
  		GPU memory region.
  
  	value
  		Hexadecimal value of the register.

  
  registers-hlsq
  		(5xx only) Register values from the HLSQ aperture.
  		Same format as the register section.