HWT: ARM CoreSight support

[br]

Summary

• Add ARM Coresight (SoC-400) support to HWT framework
• Fix bugs

some clean up is still needed

Test Plan

Tested on ARM Morello platform.

[br]

Add CORESIGHT_DEBUG macro.

[br]

Wrap long lines.

[br]

Fix comment.

[br]

Provide the name of backend needed for registration in HWT framework.

[br]

clean up

[br]

Interface to HWT changed

[br]

morello-dts included for test

[br]

Regenerate

[br]

Make coresight optional. Depends on hwt

[br]

coresight_setup() method added

[br]

regenerate

[br]

hwt_backend interface changed

[br]

Kernel-mode tracing support added.

[br]

allow tracing multiple cpus in system mode

[br]

Regenerate

[br]

ability to build as a module

[br]

Fix tracing cpu_id > 0

[br]

regenerate

[br]

regenerate

[br]

Regenerate

[zachary.leaf_arm.com]

sys/arm64/coresight/coresight.c

72

Should we dynamically allocate this based on mp_ncpus instead, especially since MAXCPU is being bumped to 1024? I think it would make sense to do that in coresight_backend_init and then can free() at the end of coresight_backend_deinit.

This is what I'm doing for SPE at the moment.

[br]

rebase for freebsd

[br]

Pass ctx to backend_deinit().

[andrew]

This doesn't build when I add hwt and coresight to my kernel config

[br]

Regen

[br]

Regen

[br]

Regenerate