diff options
| author | Dave Jiang <dave.jiang@intel.com> | 2023-10-16 10:57:54 -0700 |
|---|---|---|
| committer | Dan Williams <dan.j.williams@intel.com> | 2023-10-27 20:29:41 -0700 |
| commit | 05e37b2138a6deb1f23daf1282dc86b29968a1ab (patch) | |
| tree | 190c9abcbf65fe7f5892732154524024e1d059ce /Documentation/ABI/testing | |
| parent | 458ba8189cb4380aa6a6cc4d52ab067f80a64829 (diff) | |
| download | linux-05e37b2138a6deb1f23daf1282dc86b29968a1ab.tar.gz | |
cxl: Add decoders_committed sysfs attribute to cxl_port
This attribute allows cxl-cli to determine whether there are decoders
committed to a memdev. This is only a snapshot of the state, and
doesn't offer any protection or serialization against a concurrent
disable-region operation.
Reviewed-by: Jim Harris <jim.harris@samsung.com>
Suggested-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Link: https://lore.kernel.org/r/169747907439.272156.10261062080830155662.stgit@djiang5-mobl3
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'Documentation/ABI/testing')
| -rw-r--r-- | Documentation/ABI/testing/sysfs-bus-cxl | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/Documentation/ABI/testing/sysfs-bus-cxl b/Documentation/ABI/testing/sysfs-bus-cxl index 087f762ebfd53..432610f41aeec 100644 --- a/Documentation/ABI/testing/sysfs-bus-cxl +++ b/Documentation/ABI/testing/sysfs-bus-cxl @@ -178,6 +178,21 @@ Description: hardware decoder target list. +What: /sys/bus/cxl/devices/portX/decoders_committed +Date: October, 2023 +KernelVersion: v6.7 +Contact: linux-cxl@vger.kernel.org +Description: + (RO) A memory device is considered active when any of its + decoders are in the "committed" state (See CXL 3.0 8.2.4.19.7 + CXL HDM Decoder n Control Register). Hotplug and destructive + operations like "sanitize" are blocked while device is actively + decoding a Host Physical Address range. Note that this number + may be elevated without any regionX objects active or even + enumerated, as this may be due to decoders established by + platform firwmare or a previous kernel (kexec). + + What: /sys/bus/cxl/devices/decoderX.Y Date: June, 2021 KernelVersion: v5.14 |