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* [PATCH 0/4] drm/msm: Clear perf counters across context switch
@ 2022-03-03 19:46 Rob Clark
  2022-03-03 19:46 ` [PATCH 1/4] drm/msm: Update generated headers Rob Clark
                   ` (3 more replies)
  0 siblings, 4 replies; 12+ messages in thread
From: Rob Clark @ 2022-03-03 19:46 UTC (permalink / raw)
  To: dri-devel
  Cc: freedreno, linux-arm-msm, Jordan Crouse, Akhil P Oommen,
	Rob Clark, Abhinav Kumar, Bjorn Andersson, Dan Carpenter,
	Dmitry Baryshkov, Emma Anholt, Jonathan Marek, open list,
	Stephen Boyd, Viresh Kumar, Vladimir Lypak, Yangtao Li

From: Rob Clark <robdclark@chromium.org>

Some clever folks figured out a way to use performance counters as a
side-channel[1].  But, other than the special case of using the perf
counters for system profiling, we can reset the counters across context
switches to protect against this.

This series introduces a SYSPROF param which a sufficiently privilaged
userspace (like Mesa's pps-producer, which already must run as root) to
opt-out, and makes the default behavior to reset counters on context
switches.

[1] https://dl.acm.org/doi/pdf/10.1145/3503222.3507757

Rob Clark (4):
  drm/msm: Update generated headers
  drm/msm: Add SET_PARAM ioctl
  drm/msm: Add SYSPROF param
  drm/msm/a6xx: Zap counters across context switch

 drivers/gpu/drm/msm/adreno/a2xx.xml.h         |  26 +-
 drivers/gpu/drm/msm/adreno/a2xx_gpu.c         |   1 +
 drivers/gpu/drm/msm/adreno/a3xx.xml.h         |  30 +-
 drivers/gpu/drm/msm/adreno/a3xx_gpu.c         |   1 +
 drivers/gpu/drm/msm/adreno/a4xx.xml.h         | 112 ++-
 drivers/gpu/drm/msm/adreno/a4xx_gpu.c         |   1 +
 drivers/gpu/drm/msm/adreno/a5xx.xml.h         |  63 +-
 drivers/gpu/drm/msm/adreno/a5xx_gpu.c         |   1 +
 drivers/gpu/drm/msm/adreno/a6xx.xml.h         | 674 +++++++++++-------
 drivers/gpu/drm/msm/adreno/a6xx_gmu.xml.h     |  26 +-
 drivers/gpu/drm/msm/adreno/a6xx_gpu.c         |  30 +
 .../gpu/drm/msm/adreno/adreno_common.xml.h    |  31 +-
 drivers/gpu/drm/msm/adreno/adreno_gpu.c       |  14 +
 drivers/gpu/drm/msm/adreno/adreno_gpu.h       |   2 +
 drivers/gpu/drm/msm/adreno/adreno_pm4.xml.h   |  46 +-
 drivers/gpu/drm/msm/disp/mdp4/mdp4.xml.h      |  37 +-
 drivers/gpu/drm/msm/disp/mdp5/mdp5.xml.h      |  37 +-
 drivers/gpu/drm/msm/disp/mdp_common.xml.h     |  37 +-
 drivers/gpu/drm/msm/dsi/dsi.xml.h             |  37 +-
 drivers/gpu/drm/msm/dsi/dsi_phy_10nm.xml.h    |  37 +-
 drivers/gpu/drm/msm/dsi/dsi_phy_14nm.xml.h    |  37 +-
 drivers/gpu/drm/msm/dsi/dsi_phy_20nm.xml.h    |  37 +-
 drivers/gpu/drm/msm/dsi/dsi_phy_28nm.xml.h    |  37 +-
 .../gpu/drm/msm/dsi/dsi_phy_28nm_8960.xml.h   |  37 +-
 drivers/gpu/drm/msm/dsi/dsi_phy_5nm.xml.h     | 480 -------------
 drivers/gpu/drm/msm/dsi/dsi_phy_7nm.xml.h     |  43 +-
 drivers/gpu/drm/msm/dsi/mmss_cc.xml.h         |  37 +-
 drivers/gpu/drm/msm/dsi/sfpb.xml.h            |  37 +-
 drivers/gpu/drm/msm/hdmi/hdmi.xml.h           |  37 +-
 drivers/gpu/drm/msm/hdmi/qfprom.xml.h         |  37 +-
 drivers/gpu/drm/msm/msm_drv.c                 |  28 +
 drivers/gpu/drm/msm/msm_gpu.h                 |  29 +
 drivers/gpu/drm/msm/msm_submitqueue.c         |  34 +
 include/uapi/drm/msm_drm.h                    |  28 +-
 34 files changed, 1051 insertions(+), 1130 deletions(-)
 delete mode 100644 drivers/gpu/drm/msm/dsi/dsi_phy_5nm.xml.h

-- 
2.35.1


^ permalink raw reply	[flat|nested] 12+ messages in thread

end of thread, other threads:[~2022-03-03 22:36 UTC | newest]

Thread overview: 12+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2022-03-03 19:46 [PATCH 0/4] drm/msm: Clear perf counters across context switch Rob Clark
2022-03-03 19:46 ` [PATCH 1/4] drm/msm: Update generated headers Rob Clark
2022-03-03 20:42   ` Abhinav Kumar
2022-03-03 21:11     ` Rob Clark
2022-03-03 21:22       ` Abhinav Kumar
2022-03-03 19:46 ` [PATCH 2/4] drm/msm: Add SET_PARAM ioctl Rob Clark
2022-03-03 19:46 ` [PATCH 3/4] drm/msm: Add SYSPROF param Rob Clark
2022-03-03 20:47   ` Stephen Boyd
2022-03-03 21:17     ` Rob Clark
2022-03-03 21:47       ` Rob Clark
2022-03-03 22:36         ` Stephen Boyd
2022-03-03 19:46 ` [PATCH 4/4] drm/msm/a6xx: Zap counters across context switch Rob Clark

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