[PATCH 0/4] drm/msm: Clear perf counters across context switch

From: Rob Clark
Date: Thu Mar 03 2022 - 14:48:24 EST


From: Rob Clark <robdclark@xxxxxxxxxxxx>

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

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2.35.1