From: Kevin Rogovin <kevin.rogovin@xxxxxxxxx> This patch series proposes a new kernel interface for user space to read and write the values of the scratch page for a PPGTT. The user space is expected to guarantee (via its own locking mechanism) that nothing shall read or write to the scratch page for the duration of the ioctl's to read or write the scratch page values. The purpose for user space to read and write the scratch page values is to help see if an out-of-bound write was done to the scratch page by the GPU; from the point of view of GL, this can be used to help detect if an application performs an out-of-bounds write to an SSBO. Patch 1 defines the kernel interface Patches 2-3 implement the debug option in i965 to check for inadvertent scratch page writes by the GPU. Kevin Rogovin (3): drm-uapi: define interface to kernel for scratch page read i965: define stuff for scratch page checking in intel_screen i965: check scratch page in a locked fashion on each ioctl include/drm-uapi/i915_drm.h | 31 +++++++++++++++++++++++++++ src/intel/common/gen_debug.c | 1 + src/intel/common/gen_debug.h | 1 + src/mesa/drivers/dri/i965/intel_batchbuffer.c | 27 ++++++++++++++++++++++- src/mesa/drivers/dri/i965/intel_screen.c | 26 ++++++++++++++++++++++ src/mesa/drivers/dri/i965/intel_screen.h | 12 +++++++++++ 6 files changed, 97 insertions(+), 1 deletion(-) -- 2.15.0 _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/intel-gfx
