# cxl-enable-memdev(1) ## NAME cxl-enable-memdev - activate / hot-remove a given CXL memdev ## SYNOPSIS cxl disable-memdev \ \[\..\] \[\] A memdev typically autoenables at initial device discovery. However, if it was manually disabled this command can trigger the kernel to activate it again. This involves detecting the state of the HDM (Host Managed Device Memory) Decoders and validating that CXL.mem is enabled for each port in the device’s hierarchy. ## OPTIONS \ A memX device name, or a memdev id number. Restrict the operation to the specified memdev(s). The keyword all can be specified to indicate the lack of any restriction. -S, --serial Rather than a memdev id number, interpret the argument(s) as a list of serial numbers. -f, --force DANGEROUS: Override the safety measure that blocks attempts to disable a device if the tool determines the memdev is in active usage. Recall that CXL memory ranges might have been established by platform firmware and disabling an active device is akin to force removing memory from a running system. -v Turn on verbose debug messages in the library (if libcxl was built with logging and debug enabled). ## COPYRIGHT Copyright © 2016 - 2020, Intel Corporation. License GPLv2: GNU GPL version 2 . This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. ## SEE ALSO [cxl-disable-memdev(1)](/ndctl-user-guide/cxl-man-pages/cxl-disable-memdev-1.md) --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.pmem.io/ndctl-user-guide/cxl-man-pages/cxl-enable-memdev-1.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.