buffer: alloc main buffer struct in the runtime shared zone

[abonislawski]

Buffers can be shared between cores and it is crucial to have access
to not only proper buffer data but also description data of this buffer

Fixes #4648

Signed-off-by: Adrian Bonislawski adrian.bonislawski@intel.com

[cujomalainey]

missing signed-off-by tag

[lgirdwood]

@abonislawski I assume this has been validated on tgl13 ?

[abonislawski]

@abonislawski I assume this has been validated on tgl13 ?

@lgirdwood yes, tgl013 with some PRs from the description here:
#4648

[ranj063]

@abonislawski this change is in the right direction but I don't think it is comprehensive but that's a separate topic altogether. I think we should merge this change to tgl-013 until we stress test multi-core on SOF main.

[lgirdwood]

@abonislawski this change is in the right direction but I don't think it is comprehensive but that's a separate topic altogether. I think we should merge this change to tgl-013 until we stress test multi-core on SOF main.

Yeah, I think this is the correct hotfix required for tgl13, but long term we need to have a coherent API as it's not just buffers that will need to be shared (and we also want to use cache for performance).