drm/i915/gvt: scan non-privileged batch buffer for debug purpose

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For perfomance purpose, scanning of non-privileged batch buffer is turned
off by default. But for debugging purpose, it can be turned on via debugfs.
After scanning, we submit the original non-privileged batch buffer into
hardware, so that the scanning is only a peeking window of guest submitted
commands and will not affect the execution results.

v4:
- refine debugfs print format&content (zhenyu wang)
- print engine id instread of engine name to prevent potential memory leak
  in debugfs warning message. (zhenyu wang)

v3:
- change vgpu->scan_nonprivbb from type bool to u32, so it is able to
  selectively turn on/off scanning of non-privileged batch buffer on engine
  level. e.g.
  if vgpu->scan_nonprivbb=3, then it will scan non-privileged batch buffer
  on engine 0 and 1.
- in debugfs interface to set vgpu->scan_nonprivbb, print warning message
  to warn user and explicitly tell state change in kernel log (zhenyu wang)
v2:
- rebase
- update comments for start_gma_offset (henry)

Signed-off-by: Zhao Yan <yan.y.zhao@intel.com>
Reviewed-by: Zhenyu Wang <zhenyuw@linux.intel.com>
Signed-off-by: Zhi Wang <zhi.a.wang@intel.com>

...

This commit is contained in:

Zhao Yan 2018-04-04 13:57:09 +08:00 • committed by Zhi Wang

parent 89babe7cf1

commit 96bebe39b2

6 changed files with 173 additions and 39 deletions

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55

drivers/gpu/drm/i915/gvt/cmd_parser.c

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67

drivers/gpu/drm/i915/gvt/debugfs.c

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1

drivers/gpu/drm/i915/gvt/gvt.h

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68

drivers/gpu/drm/i915/gvt/scheduler.c

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1

drivers/gpu/drm/i915/gvt/scheduler.h

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24

drivers/gpu/drm/i915/gvt/trace.h

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