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    drm/i915/gvt: scan non-privileged batch buffer for debug purpose · 96bebe39
    Zhao Yan 提交于
    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: NZhao Yan <yan.y.zhao@intel.com>
    Reviewed-by: NZhenyu Wang <zhenyuw@linux.intel.com>
    Signed-off-by: NZhi Wang <zhi.a.wang@intel.com>
    96bebe39
gvt.h 18.3 KB