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CXL spec r3.2 8.2.9.6.1 Get Supported Features (Opcode 0500h) The command retrieve the list of supported device-specific features (identified by UUID) and general information about each Feature. The driver will retrieve the Feature entries in order to make checks and provide information for the Get Feature and Set Feature command. One of the main piece of information retrieved are the effects a Set Feature command would have for a particular feature. The retrieved Feature entries are stored in the cxl_mailbox context. The setup of Features is initiated via devm_cxl_setup_features() during the pci probe function before the cxl_memdev is enumerated. Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> Reviewed-by: Dan Williams <dan.j.williams@intel.com> Reviewed-by: Li Ming <ming.li@zohomail.com> Reviewed-by: Davidlohr Bueso <dave@stgolabs.net> Tested-by: Shiju Jose <shiju.jose@huawei.com> Link: https://patch.msgid.link/20250220194438.2281088-3-dave.jiang@intel.com Signed-off-by: Dave Jiang <dave.jiang@intel.com>