From mboxrd@z Thu Jan 1 00:00:00 1970 From: Khem Raj Date: Fri, 19 Aug 2016 10:54:22 -0700 Subject: [Buildroot] [PATCH 1/1] arch/arm: Add Cortex-a53 CPU In-Reply-To: <20160819194931.072912e5@free-electrons.com> References: <1471565224-15625-1-git-send-email-flatmax@flatmax.org> <20160819100320.1d2609bd@free-electrons.com> <192101AE-C8DB-444C-8A52-68EA27264045@gmail.com> <20160819194931.072912e5@free-electrons.com> Message-ID: <5F8C494A-03CF-46AC-B85D-107643848CD1@gmail.com> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: buildroot@busybox.net > On Aug 19, 2016, at 10:49 AM, Thomas Petazzoni wrote: > > Hello, > > On Fri, 19 Aug 2016 10:47:05 -0700, Khem Raj wrote: > >>> On Fri, 19 Aug 2016 10:07:04 +1000, Matt Flax wrote: >>>> Adds the Cortex-a53 CPU to the target architecture variant choice. This sets >>>> the toolchain to use cortex-a53 as the target. The effect is that various >>>> cortex-a53 tunings are enabled for the compilation of packages. >>>> >>>> Signed-off-by: Matt Flax >>> >>> The A53 is an ARM64 CPU, so it should rather be added to >>> Config.in.aarch64 (in which we don't yet have a CPU selection, but that >>> can be added). >>> >>> Or are you building a 32 bits ARM system for a Cortex-A53 ? In that >>> case, adding it to Config.in.arm would be OK, but it's a bit annoying >>> that we would have to duplicate many ARM CPUs between Config.in.arm and >>> Config.in.aarch64. >> >> 64bit kernel with 32bit userspace is most common usecase as of now for >> a53 that I see. so you need some sort of multilib. > > I think on RPi3 they use a 32 bit kernel and 32 bit userspace, which > probably is what Matt was targeting. But I'd like to hear from Matt's > use case first. rpi3 is 32bit all the way, so this patch is fine for that case. > > Thomas > -- > Thomas Petazzoni, CTO, Free Electrons > Embedded Linux and Kernel engineering > http://free-electrons.com -------------- next part -------------- A non-text attachment was scrubbed... Name: signature.asc Type: application/pgp-signature Size: 204 bytes Desc: Message signed with OpenPGP using GPGMail URL: