mem0 CXL type3 device not seen under sysfs

qemu-7.1

Using simplest CXL example (first example) from: https://www.qemu.org/docs/master/system/devices/cxl.html#example-command-lines

-object memory-backend-file,id=cxl-mem1,share=on,mem-path=/tmp/cxltest.raw,size=256M \
-object memory-backend-file,id=cxl-lsa1,share=on,mem-path=/tmp/lsa.raw,size=256M \
-device pxb-cxl,bus_nr=12,bus=pcie.0,id=cxl.1 \
-device cxl-rp,port=0,bus=cxl.1,id=root_port13,chassis=0,slot=2 \
-device cxl-type3,bus=root_port13,memdev=cxl-mem1,lsa=cxl-lsa1,id=cxl-pmem0 \
-M cxl-fmw.0.targets.0=cxl.1,cxl-fmw.0.size=4G

VM:
kernel-default 6.0.2-1

localhost:~ # cat /boot/config-6.0.2-1.g1071ada-default  | grep -i CXL
CONFIG_CXL_BUS=m
CONFIG_CXL_PCI=m
# CONFIG_CXL_MEM_RAW_COMMANDS is not set
CONFIG_CXL_ACPI=m
CONFIG_CXL_PMEM=m
CONFIG_CXL_MEM=m
CONFIG_CXL_PORT=m
CONFIG_CXL_SUSPEND=y
CONFIG_CXL_REGION=y


localhost:~ # ls -al /sys/bus/cxl/devices/
total 0
drwxr-xr-x 2 root root 0 Nov  1 14:46 .
drwxr-xr-x 4 root root 0 Nov  1 14:44 ..
lrwxrwxrwx 1 root root 0 Nov  1 14:46 decoder0.0 -> ../../../devices/platform/ACPI0017:00/root0/decoder0.0
lrwxrwxrwx 1 root root 0 Nov  1 14:46 nvdimm-bridge0 -> ../../../devices/platform/ACPI0017:00/root0/nvdimm-bridge0
lrwxrwxrwx 1 root root 0 Nov  1 14:46 port1 -> ../../../devices/platform/ACPI0017:00/root0/port1
lrwxrwxrwx 1 root root 0 Nov  1 14:46 root0 -> ../../../devices/platform/ACPI0017:00/root0


localhost:~ # cxl  list -vvvv
[
  {
    "bus":"root0",
    "provider":"ACPI.CXL",
    "nr_dports":1,
    "dports":[
      {
        "dport":"ACPI0016:00",
        "id":12
      }
    ],
    "ports:root0":[
      {
        "port":"port1",
        "host":"ACPI0016:00",
        "depth":1,
        "state":"disabled"
      }
    ],
    "decoders:root0":[
      {
        "decoder":"decoder0.0",
        "resource":28185722880,
        "size":4294967296,
        "interleave_ways":1,
        "max_available_extent":4294967296,
        "pmem_capable":true,
        "volatile_capable":true,
        "accelmem_capable":true,
        "nr_targets":1,
        "targets":[
          {
            "target":"ACPI0016:00",
            "position":0,
            "id":12
          }
        ]
      }
    ]
  }
]