From 374200b154ae48e8f011fb74dab21f80459f9e47 Mon Sep 17 00:00:00 2001 From: Felix Kuehling Date: Thu, 15 Mar 2018 17:27:53 -0400 Subject: drm/amdkfd: Add module option for testing large-BAR functionality Simulate large-BAR system by exporting only visible memory. This limits the amount of available VRAM to the size of the BAR, but enables CPU access to VRAM. Signed-off-by: Felix Kuehling Acked-by: Oded Gabbay Signed-off-by: Oded Gabbay --- drivers/gpu/drm/amd/amdkfd/kfd_crat.c | 3 +++ 1 file changed, 3 insertions(+) (limited to 'drivers/gpu/drm/amd/amdkfd/kfd_crat.c') diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_crat.c b/drivers/gpu/drm/amd/amdkfd/kfd_crat.c index d85112224f1d..4f126ef6139b 100644 --- a/drivers/gpu/drm/amd/amdkfd/kfd_crat.c +++ b/drivers/gpu/drm/amd/amdkfd/kfd_crat.c @@ -1117,6 +1117,9 @@ static int kfd_create_vcrat_image_gpu(void *pcrat_image, sub_type_hdr = (typeof(sub_type_hdr))((char *)sub_type_hdr + sub_type_hdr->length); + if (debug_largebar) + local_mem_info.local_mem_size_private = 0; + if (local_mem_info.local_mem_size_private == 0) ret = kfd_fill_gpu_memory_affinity(&avail_size, kdev, HSA_MEM_HEAP_TYPE_FB_PUBLIC, -- cgit v1.2.3