From 5971f6e272a0dcfaa1157094f5e6a4f1929316d5 Mon Sep 17 00:00:00 2001 From: Russell Currey Date: Wed, 3 May 2017 11:49:29 +1000 Subject: npu, npu2: Describe diag data size in device tree NPU and NPU2 don't use diag data, but the kernel will allocate a buffer for NPU PHBs regardless. Set ibm,phb-diag-data-size to 0 for NPU PHBs to save a whole precious 8K. Signed-off-by: Russell Currey Acked-by: Alistair Popple Signed-off-by: Stewart Smith --- hw/npu.c | 1 + hw/npu2.c | 1 + 2 files changed, 2 insertions(+) diff --git a/hw/npu.c b/hw/npu.c index f00e9c5..b113800 100644 --- a/hw/npu.c +++ b/hw/npu.c @@ -1152,6 +1152,7 @@ static void npu_probe_phb(struct dt_node *dn) dt_add_property_cells(np, "ibm,npcq", dn->phandle); dt_add_property_cells(np, "ibm,links", links); dt_add_property(np, "ibm,mmio-window", mm_win, sizeof(mm_win)); + dt_add_property_cells(np, "ibm,phb-diag-data-size", 0); } static void npu_dev_populate_vendor_cap(struct npu_dev_cap *cap) diff --git a/hw/npu2.c b/hw/npu2.c index 3172662..a8560cf 100644 --- a/hw/npu2.c +++ b/hw/npu2.c @@ -1209,6 +1209,7 @@ static void npu2_probe_phb(struct dt_node *dn) dt_add_property_cells(np, "ibm,npcq", dn->phandle); dt_add_property_cells(np, "ibm,links", links); dt_add_property(np, "ibm,mmio-window", mm_win, sizeof(mm_win)); + dt_add_property_cells(np, "ibm,phb-diag-data-size", 0); } static uint32_t npu2_populate_pcie_cap(struct npu2_dev *dev, -- cgit v1.1