diff options
| author | Dan Williams <dan.j.williams@intel.com> | 2023-02-10 12:05:45 +0300 |
|---|---|---|
| committer | Dan Williams <dan.j.williams@intel.com> | 2023-02-11 04:32:01 +0300 |
| commit | a8e7d558f7e9c2921de8b487baa01d23f068aa93 (patch) | |
| tree | 2985b1bdc4b95f5fb0bc61c289deb4c41ba4d286 /Documentation/ABI | |
| parent | 7d505f982f53189da819581ad4cc13c8cef76803 (diff) | |
| download | linux-a8e7d558f7e9c2921de8b487baa01d23f068aa93.tar.xz | |
cxl/region: Support empty uuids for non-pmem regions
Shipping versions of the cxl-cli utility expect all regions to have a
'uuid' attribute. In preparation for 'ram' regions, update the 'uuid'
attribute to return an empty string which satisfies the current
expectations of 'cxl list -R'. Otherwise, 'cxl list -R' fails in the
presence of regions with the 'uuid' attribute missing. Force the
attribute to be read-only as there is no facility or expectation for a
'ram' region to recall its uuid from one boot to the next.
Reviewed-by: Vishal Verma <vishal.l.verma@intel.com>
Tested-by: Fan Ni <fan.ni@samsung.com>
Reviewed-by: Ira Weiny <ira.weiny@intel.com>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Link: https://lore.kernel.org/r/167601994558.1924368.12612811533724694444.stgit@dwillia2-xfh.jf.intel.com
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'Documentation/ABI')
| -rw-r--r-- | Documentation/ABI/testing/sysfs-bus-cxl | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/Documentation/ABI/testing/sysfs-bus-cxl b/Documentation/ABI/testing/sysfs-bus-cxl index 058b0c45001f..4c4e1cbb1169 100644 --- a/Documentation/ABI/testing/sysfs-bus-cxl +++ b/Documentation/ABI/testing/sysfs-bus-cxl @@ -317,7 +317,8 @@ Contact: linux-cxl@vger.kernel.org Description: (RW) Write a unique identifier for the region. This field must be set for persistent regions and it must not conflict with the - UUID of another region. + UUID of another region. For volatile ram regions this + attribute is a read-only empty string. What: /sys/bus/cxl/devices/regionZ/interleave_granularity |