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+CXL Device Missing PCI_CAP_ID_PM (01h) in CAP List Implementation According to PCIe SPEC
+Description of problem:
+- The lack of **PCI_CAP_ID_PM (01h)** will not cause any crash or error when running QEMU, but it is violated to the PCIe SPEC.
+- When some vendors test the power management capability (e.g., Linux Runtime PM), they must manually implement this CAP list to support the D1/D2/D3_Hot d-states changes.
+- We don't see any PCI_CAP_ID_PM (01h) in the CXL rootport or endpoint
+
+    ![image](/uploads/ba5f2de689eb1059b2b82ab072f1bf7b/image.png){width=349 height=474}
+
+
+#
+Steps to reproduce:
+1. Run the qemu-system-x86 (See QEMU command line)
+2. sudo lspci -xxx