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The LIBNVDIMM subsystem is a platform agnostic representation of system NVDIMM / persistent memory resources. To date, the CXL subsystem's interaction with LIBNVDIMM has been to register an nvdimm-bridge device and cxl_nvdimm objects to proxy CXL capabilities into existing LIBNVDIMM subsystem mechanics. With regions the approach is the same. Create a new cxl_pmem_region object to proxy CXL region details into a LIBNVDIMM definition. With this enabling LIBNVDIMM can partition CXL persistent memory regions with legacy namespace labels. A follow-on patch will add CXL region label and CXL namespace label support to persist region configurations across driver reload / system-reset events. Co-developed-by: Ben Widawsky <bwidawsk@kernel.org> Signed-off-by: Ben Widawsky <bwidawsk@kernel.org> Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> Link: https://lore.kernel.org/r/165784340111.1758207.3036498385188290968.stgit@dwillia2-xfh.jf.intel.com Signed-off-by: Dan Williams <dan.j.williams@intel.com> |
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