From mboxrd@z Thu Jan 1 00:00:00 1970 From: tony@atomide.com (Tony Lindgren) Date: Wed, 23 Nov 2016 07:55:03 -0800 Subject: [RFC PATCH 11/11] ARM: Allow ARCH_MULTIPLATFORM to be selected for NOMMU In-Reply-To: <583478FB.4020008@arm.com> References: <1479806768-39911-1-git-send-email-vladimir.murzin@arm.com> <1479806768-39911-12-git-send-email-vladimir.murzin@arm.com> <16587553.f9R1mxJih5@wuerfel> <583478FB.4020008@arm.com> Message-ID: <20161123155503.GE4082@atomide.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org * Vladimir Murzin [161122 08:57]: > On 22/11/16 10:17, Arnd Bergmann wrote: > > Another question is what architecture levels and what platforms > > we want to support without MMU. The only ARMv4/v5 platform we > > still have that can actually use NOMMU cores is Integrator > > with its ARM7TDMI, ARM920T and ARM966E core tiles (and possibly > > others I couldn't immediately find). Do we actually care about > > them any more now that all the NOMMU world is ARMv7-M? Are > > there any benefits in running an ARM920T or ARM926E core > > with MMU disabled, and does this work with your patches? > > > > I don't have such hardware, so I can't acctually test it - it is why "there is > no guaranty" :( OTOH, if sombody has these platforms these pathces is a good > start to try NOMMU. I believe the reason to run them without MMU might be still valid if we ever get mainline Linux kernel working on some 3G/LTE modems for latency reasons. Not that I know of any use cases, but if we have it working we might as well keep it working. Regards, Tony