Fail to hot-add NVMe devices to VMs when SRIOV enabled

[jiewei-ke]

In ESXi 8.0, my VM is configured with an SR-IOV VF network card and multiple passthrough NVMe disks. While the VM is running, I am unable to hot-add NVMe disks and encounter the following error:

$ GOVC_INSECURE=true govc device.pci.add -vm test-vm -u ... -debug=true 0000:da:00.0
govc: The hot-plug operation failed.  (msg.devices.hotplug.failed)
govc: Hot-add of 'pciPassthru3' failed.  (msg.devices.hotadd.failed)
govc: Migration failed after VM memory precopy. Please check vmkernel log for true error.  (msg.migrate.fail.source.afterPrecopy)
govc: The hot-plug operation failed.

However, after hot-removing the SR-IOV VF network card, I can successfully hot-add the NVMe disk.

Could you explain the possible reason for the conflict between SR-IOV and hot-adding NVMe disks?