Provided by: cxl_77-2.2ubuntu2_amd64 bug

NAME
       cxl-free-dpa - release device-physical address space


SYNOPSIS
       cxl free-dpa <mem0> [<mem1>..<memN>] [<options>]

       The CXL region provisioning process proceeds in multiple steps. One of the steps is identifying and
       reserving the DPA span that each member of the interleave-set (region) contributes in advance of
       attaching that allocation to a region. For development, test, and debug purposes this command is a helper
       to find the last allocated decoder on a device and zero-out / free its DPA allocation.


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 an a memdev id number, interpret the <memdev> argument(s) as a list of serial numbers.

       -d, --decoder
           Specify the decoder to free. The CXL specification mandates that DPA must be released in the reverse
           order it was allocated. See cxl-reserve-dpa(1)

       -t, --type
           Constrain the search for "last allocated decoder" to decoders targeting the given partition.

       -f, --force
           The kernel enforces CXL DPA ordering constraints on deallocation events, and the tool anticipates
           those and fails operations that are expected to fail without sending them to the kernel. For test
           purposes, continue to attempt "expected to fail" operations to exercise the driver.

       -v
           Turn on verbose debug messages in the library (if libcxl was built with logging and debug enabled).


COPYRIGHT
       Copyright © 2016 - 2022, 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-reserve-dpa(1)

cxl                                                2024-11-01                                    CXL-FREE-DPA(1)