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    Subject[PATCH 0/3] drm/msm: Add support for the WHERE_AM_I opcode
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    The microcode in linux-firmware has been updated to 1.87.01 for a5xx
    1.77.01 for a6xx [1]. These microcode versions support a new opcode called
    WHERE_AM_I that takes the place of the hardware RPTR shadow and enables the
    microcode to update the RPTR shadow in privileged memory so it is protected
    against the user.

    This patch series re-enables the RPTR shadow and preemption for a5xx and older
    versions of a6xx if the WHERE_AM_I opcode is available. Newer a6xx targets
    (starting with a650) have automatic privileged protection so the hardware RPTR
    shadow can be renabled for those targets too. If any of the needed dependencies
    aren't met then the RPTR shadow will remain disabled (along with preemption on
    5xx).

    This stack is bsed on https://gitlab.freedesktop.org/drm/msm.git msm-next-pgtables
    as there are some minor dependencies on the reorganized code in the pgtable
    stack.

    Jordan

    [1] https://git.kernel.org/pub/scm/linux/kernel/git/firmware/linux-firmware.git/commit/?id=f48fec44127f88ce83ea1bcaf5824de4146ca2f9

    Jordan Crouse (3):
    drm/msm: Allow a5xx to mark the RPTR shadow as privileged
    drm/msm: a6xx: Use WHERE_AM_I for eligible targets
    drm/msm: Get rid of the REG_ADRENO offsets

    drivers/gpu/drm/msm/adreno/a2xx_gpu.c | 65 +++++++++---
    drivers/gpu/drm/msm/adreno/a3xx_gpu.c | 77 +++++++++++---
    drivers/gpu/drm/msm/adreno/a4xx_gpu.c | 82 +++++++++++----
    drivers/gpu/drm/msm/adreno/a5xx_gpu.c | 108 ++++++++++++++++----
    drivers/gpu/drm/msm/adreno/a5xx_gpu.h | 12 +++
    drivers/gpu/drm/msm/adreno/a5xx_power.c | 2 +-
    drivers/gpu/drm/msm/adreno/a5xx_preempt.c | 5 +-
    drivers/gpu/drm/msm/adreno/a6xx_gpu.c | 100 +++++++++++++++---
    drivers/gpu/drm/msm/adreno/a6xx_gpu.h | 9 ++
    drivers/gpu/drm/msm/adreno/adreno_gpu.c | 81 +--------------
    drivers/gpu/drm/msm/adreno/adreno_gpu.h | 81 +--------------
    drivers/gpu/drm/msm/adreno/adreno_pm4.xml.h | 1 +
    drivers/gpu/drm/msm/msm_gpu.h | 1 +
    13 files changed, 377 insertions(+), 247 deletions(-)

    --
    2.25.1

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