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Diffstat (limited to 'Documentation/ABI')
| -rw-r--r-- | Documentation/ABI/testing/sysfs-bus-cxl | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/Documentation/ABI/testing/sysfs-bus-cxl b/Documentation/ABI/testing/sysfs-bus-cxl index bda2cc55cc38..f680da85fd44 100644 --- a/Documentation/ABI/testing/sysfs-bus-cxl +++ b/Documentation/ABI/testing/sysfs-bus-cxl @@ -44,3 +44,16 @@ Description: CXL component registers. The 'uport' symlink connects the CXL portX object to the device that published the CXL port capability. + +What: /sys/bus/cxl/devices/portX/dportY +Date: June, 2021 +KernelVersion: v5.14 +Contact: linux-cxl@vger.kernel.org +Description: + CXL port objects are enumerated from either a platform firmware + device (ACPI0017 and ACPI0016) or PCIe switch upstream port with + CXL component registers. The 'dportY' symlink identifies one or + more downstream ports that the upstream port may target in its + decode of CXL memory resources. The 'Y' integer reflects the + hardware port unique-id used in the hardware decoder target + list. |