diff --git a/drivers/gpu/nvgpu/gk20a/gk20a.c b/drivers/gpu/nvgpu/gk20a/gk20a.c
index 97649b19b..0dc0dca53 100644
--- a/drivers/gpu/nvgpu/gk20a/gk20a.c
+++ b/drivers/gpu/nvgpu/gk20a/gk20a.c
@@ -1625,6 +1625,11 @@ static u32 gk20a_determine_L2_size_bytes(struct gk20a *g)
 		bytes_per_line = 128;
 		break;
 
+	case GK20A_GPUID_GM20B:
+		lts_per_ltc = 2;
+		bytes_per_line = 128;
+		break;
+
 	default:
 		dev_err(dev_from_gk20a(g), "Unknown GPU id 0x%02x\n",
 			(unsigned)gpuid);
diff --git a/drivers/gpu/nvgpu/gk20a/gk20a.h b/drivers/gpu/nvgpu/gk20a/gk20a.h
index 48b0f0a6d..b8de8744a 100644
--- a/drivers/gpu/nvgpu/gk20a/gk20a.h
+++ b/drivers/gpu/nvgpu/gk20a/gk20a.h
@@ -567,6 +567,9 @@ gk20a_request_firmware(struct gk20a *g, const char *fw_name);
 #define GK20A_GPUID_GK20A \
 	GK20A_GPUID(NVHOST_GPU_ARCH_GK100, NVHOST_GPU_IMPL_GK20A)
 
+#define GK20A_GPUID_GM20B \
+	GK20A_GPUID(NVHOST_GPU_ARCH_GM200, NVHOST_GPU_IMPL_GM20B)
+
 int gk20a_init_gpu_characteristics(struct gk20a *g);
 
 #endif /* _NVHOST_GK20A_H_ */