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

[Leo Yan]

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.

Thanks,
Leo