From mboxrd@z Thu Jan 1 00:00:00 1970 From: arnd@arndb.de (Arnd Bergmann) Date: Wed, 02 Dec 2015 16:58:14 +0100 Subject: [PATCH v2] multi_v7_defconfig: Remove CONFIG_SOC_LS1021A In-Reply-To: References: <1448969745-19743-1-git-send-email-fabio.estevam@freescale.com> <2978679.eRosYNosdF@wuerfel> Message-ID: <3227508.0XRP5bODaT@wuerfel> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org On Wednesday 02 December 2015 02:12:18 Huan Wang wrote: > > On Tuesday 01 December 2015 09:35:45 Fabio Estevam wrote: > > > multi_v7_defconfig is not suitable for booting LS1021 as it needs > > > LPAE. > > > > > > Remove this option. > > > > > > Signed-off-by: Fabio Estevam > > > > This needs a better explanation. Why do we need LPAE for this platform? > > > > > [Alison Wang] Because PCIE, IFC region 2, DRAM2 and other IPs on LS1021A > are in the 40-bit address space, so we need to enable LPAE to access those > memory beyond the 4GB limit. > > Let me summarize the current status. I have made multi_v7_lpae_defconfig to > support LS1021A according to the suggestion from Russell King. Olof Johansson > said they have discussed it before and they have chosen to just have a > multi_v7_defconfig. Attached is the discussion. There is not further > solution about the discussion. > > So now, I suggest to remain LS1021A in multi_v7_defconfig at least. I think that's fine for the time being. We are still looking for a good way to deal with LPAE configurations in general. Arnd