semantic: 0.188
other: 0.162
device: 0.112
graphic: 0.075
PID: 0.073
vnc: 0.059
network: 0.047
socket: 0.046
files: 0.045
boot: 0.044
permissions: 0.043
performance: 0.041
debug: 0.036
KVM: 0.028
debug: 0.235
performance: 0.204
other: 0.138
device: 0.124
files: 0.055
network: 0.051
boot: 0.047
semantic: 0.037
socket: 0.029
PID: 0.022
graphic: 0.017
KVM: 0.017
permissions: 0.014
vnc: 0.010

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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