device: 0.726
ppc: 0.695
graphic: 0.614
network: 0.587
mistranslation: 0.515
socket: 0.504
semantic: 0.498
user-level: 0.493
performance: 0.453
architecture: 0.433
i386: 0.416
x86: 0.398
PID: 0.398
risc-v: 0.352
vnc: 0.349
VMM: 0.342
hypervisor: 0.312
boot: 0.305
peripherals: 0.301
TCG: 0.299
KVM: 0.295
permissions: 0.275
kernel: 0.274
register: 0.260
virtual: 0.202
arm: 0.192
files: 0.177
debug: 0.165
assembly: 0.148

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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