cxl-enable-memdev(1)

NAME

cxl-enable-memdev - activate / hot-remove a given CXL memdev

SYNOPSIS

cxl disable-memdev <mem0> [<mem1>..<memN>] [<options>]

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

<memory device(s)>

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 http://gnu.org/licenses/gpl.html. 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)