Hi!
Do we somehow need to clarify in the headers the semantics for this?
From my understanding when discussing the CCS migration series with
Ram, the kernel will never do any resolving (compressing /
decompressing) migrations or evictions which basically implies the
following:
*) Compressed data must have LMEM only placement, otherwise the GPU
would read garbage if accessing from SMEM.
*) Compressed data can't be assumed to be mappable by the CPU, because
in order to ensure that on small BAR, the placement needs to be LMEM+SMEM.
*) Neither can compressed data be part of a CAPTURE buffer, because that
requires the data to be CPU-mappable.
Are we (and user-mode drivers) OK with these restrictions, or do we need
to rethink?
Thanks,
Thomas
