On 24/09/25 02:38PM, Alison Schofield wrote:
On Wed, Sep 17, 2025 at 07:11:12PM +0530, Neeraj Kumar wrote:
Saved root decoder info is required for cxl region persistency
It seem there must be a more detailed story here.
Saving the root decoder in struct cxl_memdev does not sound
persistent. Please add more detail on how this step fits
into the grander scheme.
Yes it has story. For region creation using cxl_create_region()
we need to know the root decoder.
In current case cxl root decocer is provided from ndctl using device
attribute create_region_store(). And saving root decoder (cxlrd) in
cxl_memdev(cxlmd) helps to get root decoder during region creation.
Actually, cxl_memdev instance is saved in struct cxl_nvdimm(cxl_nvd). So
after parsing region information from nvdimm driver we recreate region
and thus cxlmd is available from cxl_nvd along with saved cxlrd
I will elaborate commit message with above information
Regards,
Neeraj
