[aarch64-port-dev ] RFR: 8079203: aarch64: need to cater for different partner implementations

Jon Masters jcm at redhat.com
Wed May 6 03:45:48 UTC 2015

On 05/05/2015 10:57 AM, Andrew Haley wrote:
> On 05/05/2015 03:52 PM, Mark Rutland wrote:
>> We're looking into exposing such information to userspace in a more
>> structured manner at the moment, but we don't have an RFC just yet. I
>> take it that you would be interested when that appears?
> You're not kidding.  This is something we need desperately, some time
> last year.  JIT compilers really are different to all other userspace
> programs in this regard: we really do need to know exact models,
> pipelines, and so on, in order to generate best code.  In some cases
> we even need to minor CPU versions to work around bugs.  We really
> don't want to have to parse /proc/cpuinfo.

I've got an action to get a Linaro card (development request) setup to
provide this info as an AUXVEC into userspace in some sane way. I'll
ping Mark and see what he has in mind before proceeding.


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