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40fb95d51a
For Xe3+, the upper 8 bits of the second dword of a potential hit is used to store hitGroupIndex0, which is stuffed by the HW. This hitGroupIndex0 will later be used by the HW again to reconstruct the whole hitGroupIndex when driver issues a TRACE_RAY_COMMIT. We were corrupting this hitGroupIndex0 at the driver by setting the whole dword to hit_kind, which will cause the HW to read a wrong hitGroupIndex and therefore invoke a wrong closest hit shader. The behavior can be seen in dEQP-VK.ray_tracing_pipeline.pipeline_no_null_shaders_flag.gpu.boxes.\* and dEQP-VK.ray_tracing_pipeline.pipeline_library.configurations.\* This commit changes the driver to only use lower 24bits to store the hit_kind, and leave the upper 8bits as it. Signed-off-by: Kevin Chuang <kaiwenjon23@gmail.com> Reviewed-by: Sagar Ghuge <sagar.ghuge@intel.com> Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com> Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/33047> |
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