device: 0.726
graphic: 0.614
network: 0.587
socket: 0.504
semantic: 0.498
performance: 0.453
PID: 0.398
other: 0.365
vnc: 0.349
boot: 0.305
KVM: 0.295
permissions: 0.275
files: 0.177
debug: 0.165

xHCI Port Status Change Event at port powered

Per section 4.19.3 of the xHCI version 1.0 specification, when the Port Power bit transitions from 0 to 1, if there is a connection on that port, a Port Status Change Event should be issued.

Currently, when the port is powered, this event is not being issued.

I don't know the QEMU code base well enough to submit a patch, but I believe that when the port is powered, check to see if there is a connection (hence, setting the CCS and CSC bits), and then a call to:

xhci_port_notify(port, PORTSC_PLC);

will suffice.

Thank you,
Ben

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