Re: [PATCH v15 3/8] cxl/cdat: Gather DSMAS data for DCD partitions

[Alison Schofield]

On Wed, Oct 07, 2026 at 01:16:36PM -0700, Anisa Su wrote:
> From: Ira Weiny <iweiny@xxxxxxxxxx>
> 
> Additional DCD partition (AKA region) information is contained in the
> DSMAS CDAT tables, including performance, shareable and read-only
> attributes.
> 
> Match DCD partitions with DSMAS tables and store the meta data. A DCD
> shall describe its DC partition in a DSMAS entry (CXL r4.0 9.13.3), so
> if the CDAT is absent, fails to parse, or has no entry matching the DC
> partition, disable DCD rather than run with unknown attributes.
> 
> DSLBIS is optional, but cxl_cdat_endpoint_process() treated zero DSLBIS
> entries as a parse failure, which would now disable DCD on a device with
> a valid DSMAS. Accept an empty DSLBIS, and skip DSMAS entries with no
> DSLBIS coordinates.
> 
> Signed-off-by: Ira Weiny <iweiny@xxxxxxxxxx>
> Co-developed-by: Anisa Su <anisa.su@xxxxxxxxxxx>
> Signed-off-by: Anisa Su <anisa.su@xxxxxxxxxxx>

Reviewed-by: Alison Schofield <alison.schofield@xxxxxxxxx>