From mboxrd@z Thu Jan 1 00:00:00 1970 From: trblinux@gmail.com (Tushar Behera) Date: Fri, 06 Jun 2014 10:08:12 +0530 Subject: Problems booting exynos5420 with >1 CPU In-Reply-To: References: Message-ID: <539145B4.5000200@gmail.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org On 06/06/2014 06:38 AM, Doug Anderson wrote: > Hi, > > When I try to boot linuxnext on my exynos5420-peach-pit chromebook I > have problems bringing up extra CPUs: > > 1. They don't come up > [ ... ] > [ 1.125030] CPU1: failed to boot: -38 > [ 2.130043] CPU2: failed to boot: -38 > [ 3.135059] CPU3: failed to boot: -38 > With following config modifications over exynos_defconfig, I can see 4 big cores coming up. CONFIG_MCPM=y CONFIG_EXYNOS5420_MCPM=y [ 0.030919] Exynos MCPM support installed [ 0.060233] CPU1: Booted secondary processor [ 0.090006] CPU1: update cpu_power 1535 [ 0.090010] CPU1: thread -1, cpu 1, socket 0, mpidr 80000001 [ 0.100234] CPU2: Booted secondary processor [ 0.130007] CPU2: update cpu_power 1535 [ 0.130011] CPU2: thread -1, cpu 2, socket 0, mpidr 80000002 [ 0.140233] CPU3: Booted secondary processor [ 0.170008] CPU3: update cpu_power 1535 [ 0.170012] CPU3: thread -1, cpu 3, socket 0, mpidr 80000003 -- Tushar Behera