From mboxrd@z Thu Jan 1 00:00:00 1970 From: thomas.petazzoni@free-electrons.com (Thomas Petazzoni) Date: Mon, 19 May 2014 11:19:15 +0200 Subject: [RFC PATCHv1 0/7] ARM core support for hardware I/O coherency in non-SMP platforms In-Reply-To: <20140516151130.GB7171@localhost> References: <1400082641-23871-1-git-send-email-thomas.petazzoni@free-electrons.com> <20140514170456.GC15946@arm.com> <20140515115010.0d6a4d92@free-electrons.com> <20140515142205.GC1499@arm.com> <20140515152553.GA30423@localhost> <20140516151130.GB7171@localhost> Message-ID: <20140519111915.7cfe0470@free-electrons.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org Dear Catalin Marinas, On Fri, 16 May 2014 16:11:30 +0100, Catalin Marinas wrote: > > My question is should the kernel unconditionally enable the SCU > > regardless of CONFIG_SMP or any other condition? Is there harm in > > enabling the SCU when in AMP mode? > > I don't see why we couldn't always enable the SCU at boot, whether the > OS runs SMP, AMP or UP mode. Does this means that my "[RFC PATCHv1 4/7] ARM: kernel: allow the SCU to be enabled even on !SMP" is OK ? Thanks, Thomas -- Thomas Petazzoni, CTO, Free Electrons Embedded Linux, Kernel and Android engineering http://free-electrons.com