From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jon Hunter Subject: Re: Only 1 CPU on Jetson TX1 Date: Mon, 27 Mar 2017 17:04:47 +0100 Message-ID: <4b0edda6-c6a9-3d9c-e361-f881a5f61ada@nvidia.com> References: <20170323001131.GA7507@jirafa.cyrius.com> <6da81dbc-b070-da0f-1589-ec2cb8f453d5@kapsi.fi> <20170326224912.GD4723@jirafa.cyrius.com> Mime-Version: 1.0 Content-Type: text/plain; charset="windows-1252" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: Sender: linux-tegra-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: Stephen Warren , Martin Michlmayr , Mikko Perttunen Cc: linux-tegra-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, Vagrant Cascadian , Thierry Reding List-Id: linux-tegra@vger.kernel.org On 27/03/17 16:39, Stephen Warren wrote: > On 03/26/2017 04:49 PM, Martin Michlmayr wrote: >> * Mikko Perttunen [2017-03-25 10:32]: >>> It appears you need to have >>> >>> fdt_copy_node_names=/cpus:/psci >>> fdt_copy_src_addr=0x83080000 >>> >>> in your U-Boot configuration. This is documented somewhere in the >>> middle of >>> http://elinux.org/Jetson/TX1_Upstream_Kernel. >> >> I can confirm that this works with u-boot from L4T R24.2.1. >> >> However, it doesn't work with mainling u-boot (grepping for fdt_copy_ >> doesn't show anything in the source code). >> >> Does anyone know how to get all 4 CPUs working with mainline u-boot? > > Thierry, Jon, do you know? > > The "fdt_copy" feature of U-Boot isn't upstreamed since I thought it was > only required to boot the L4T kernel, not mainline. We're also reworking > L4T so this feature won't be needed there either, so I don't expect to > upstream "fdt_copy". Yes I would not expect that to go upstream, I see the same problem reported, I will take a look. Cheers Jon -- nvpublic