Hi, There is an interesting feature divergence between amdgpu and amdkfd concerning the shared/private apertures. I restricted my analysis to gfx9, it may differ with other gfx. In amdgpu, the pair of aperture start addresses is defined the following way (in gmc_v9_0.c): * shared_aperture_start = 0x2000000000000000ULL * private_aperture_start = 0x1000000000000000ULL In amdkfd, the pair is reversed (cf kfd_flat_memory.c and kfd_device_queue_manager_v9.c): * lds_base (ie shared_aperture_start) = (0x1UL) << 48 * scratch_base (ie private_aperture_start) = (0x2UL) << 48 Is there any reason why those two definitions diverge ? Thanks, RD
