drm/msm/a6xx: Track current_ctx_seqno per ring

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With preemption it is not enough to track the current_ctx_seqno globally
as execution might switch between rings.

This is especially problematic when current_ctx_seqno is used to
determine whether a page table switch is necessary as it might lead to
security bugs.

Track current context per ring.

Tested-by: Rob Clark <robdclark@gmail.com>
Tested-by: Neil Armstrong <neil.armstrong@linaro.org> # on SM8650-QRD
Tested-by: Neil Armstrong <neil.armstrong@linaro.org> # on SM8550-QRD
Tested-by: Neil Armstrong <neil.armstrong@linaro.org> # on SM8450-HDK
Signed-off-by: Antonino Maniscalco <antomani103@gmail.com>
Patchwork: https://patchwork.freedesktop.org/patch/618012/
Signed-off-by: Rob Clark <robdclark@chromium.org>

...

This commit is contained in:

Antonino Maniscalco 2024-10-03 18:12:51 +02:00 • committed by Rob Clark

parent 76a28f4c0c

commit 3241504ea2

8 changed files with 23 additions and 22 deletions

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2

drivers/gpu/drm/msm/adreno/a2xx_gpu.c

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2

drivers/gpu/drm/msm/adreno/a3xx_gpu.c

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2

drivers/gpu/drm/msm/adreno/a4xx_gpu.c

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6

drivers/gpu/drm/msm/adreno/a5xx_gpu.c

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drivers/gpu/drm/msm/adreno/a6xx_gpu.c

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drivers/gpu/drm/msm/msm_gpu.c

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11

drivers/gpu/drm/msm/msm_gpu.h

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10

drivers/gpu/drm/msm/msm_ringbuffer.h

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