[oe] [PATCH v1] OpenCSD: Support for Arm CoreSight decode lib

[Khem Raj]

On Wed, Mar 4, 2020 at 5:43 PM Leo Yan <leo.yan at linaro.org> wrote:
>
> Hi all,
>
> On Wed, Mar 04, 2020 at 11:19:37AM -0800, Khem Raj wrote:
> >
> >
> > On 3/4/20 8:05 AM, Scott Murray wrote:
> > > On Wed, 4 Mar 2020, Leo Yan wrote:
> > >
> > > > This recipe is to support OpenCSD, which is an open source
> > > > CoreSight trace decode library and utility.
> > >
> > > Just a thought, this seems like the kind of thing that might make sense
> > > for the new meta-arm layer that Jon has been working up?
>
> Thanks for the suggestion, Scott.
>
> To be honest, I didn't know meta-arm layer before; seems to me it makes
> sense to integrate this recipe into meta-arm rather than
> meta-openembedded.  Will explain more for Khem's question.
>
> > it also says x86_64 in COMPATIBLE_HOST, while coresight seems to be arm
> > specific is this not supposed to be so ?
>
> OpenCSD lib is dedicated to be used for Arm CoreSight IP, but it can
> be built both for x86_64's and Arm64's distro.
>
> The main usage case is to enable OpenCSD lib for Arm64 building, and the
> users can decode the trace data with Perf/OpenCSD in the same distro.
> Though I set COMPATIBLE_HOST for x86_64, it would be seldom to do cross
> analysis (e.g. capture trace data in OE/Arm64 and copy the perf data to
> OE/x86_64 for analysis).
>
> For this reason, it's good to maintain this recipe in meta-arm.  If no
> objection, I will prepare patch for meta-arm.

Makes sense in meta-arm

>
> Thanks,
> Leo