Listing ISM devices
Because ISM devices are PCI devices, you can list them with the lspci command.
Example
# lspci -v
0001:00:00.0 Non-VGA unclassified device: IBM Internal Shared Memory (ISM) virtual PCI device
Physical Slot: 000002e1
Flags: bus master, fast devsel, latency 0, IRQ 8
Memory at 8001000000000000 (64-bit, prefetchable) [size=256T]
Memory at 8002000000000000 (64-bit, prefetchable) [size=256]
Capabilities: [40] MSI: Enable+ Count=1/32 Maskable- 64bit+
Kernel driver in use: ism
Kernel modules: ism