On Sat, Dec 14, 2024 at 08:58:33PM -0600, Ira Weiny wrote: > CXL Dynamic Capacity Devices (DCDs) optionally support dynamic capacity > with up to eight partitions (Regions) (dc0-dc7). CXL regions can now be > sparse and defined as dynamic capacity (dc). > > DCD region creation requires a specific partition, or decoder mode, to > be supplied. Introduce a required option for dc regions to specify the > decoder mode. > > Add support for dynamic capacity region creation. > > Based on an original patch from Navneet Singh. > > Signed-off-by: Sushant1 Kumar <sushant1.ku...@intel.com> > Co-developed-by: Ira Weiny <ira.we...@intel.com> > Signed-off-by: Ira Weiny <ira.we...@intel.com> > --- > Documentation/cxl/cxl-create-region.txt | 11 ++++++++-- > cxl/json.c | 27 ++++++++++++++++++++++- > cxl/memdev.c | 4 +++- > cxl/region.c | 39 > ++++++++++++++++++++++++++++++++- > 4 files changed, 76 insertions(+), 5 deletions(-) > > diff --git a/Documentation/cxl/cxl-create-region.txt > b/Documentation/cxl/cxl-create-region.txt > index > b244af60b8a63281ed63d0d6f4027ea729ad51b0..a12cc8d3f19fa582376599ecc8512640f15ce42c > 100644 > --- a/Documentation/cxl/cxl-create-region.txt > +++ b/Documentation/cxl/cxl-create-region.txt > @@ -75,8 +75,9 @@ include::bus-option.txt[] > > -t:: > --type=:: > - Specify the region type - 'pmem' or 'ram'. Default to root decoder > - capability, and if that is ambiguous, default to 'pmem'. > + Specify the region type - 'pmem', 'ram', or 'dc'. Default to root > + decoder capability including the first of any DC partition found. If > + the decoder capability is ambiguous, default to 'pmem'.
When or why is a root decoders capability ambiguous? Is type 'dc' really analagous to 'pmem' or 'ram'? As a newbie to DCD, I'd have guessed it would say 'dyn' or 'dynamic' because dc is more analagous to 'pc' and 'rc' and we don't use those. -- snip to end >
