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[Qemu-devel] USB PCI host bus adapter hot plug
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From: |
Alexey Kardashevskiy |
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Subject: |
[Qemu-devel] USB PCI host bus adapter hot plug |
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Date: |
Mon, 11 Aug 2014 14:02:52 +1000 |
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User-agent: |
Mozilla/5.0 (X11; Linux i686 on x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.0 |
Hi!
I noticed that QMP's "device_add usb-ehci,id=i2,bus=pci.0" fails on PCI
hotplug. The same for pci-ohci and this is because their initfn() do
"dc->hotpluggable = false". So I removed those and now I can hotplug USB
hosts but none of them is able to actually work:
address@hidden:~# echo 1 >/sys/bus/pci/rescan
[ 41.143062] ohci-pci 0000:00:01.0: init err (c8700000 0000)
[ 41.143133] ohci-pci 0000:00:01.0: can't start
[ 41.143227] ohci-pci 0000:00:01.0: startup error -75
[ 41.144202] ohci-pci 0000:00:01.0: init 0000:00:01.0 fail, -75
address@hidden:~# echo 1 >/sys/bus/pci/rescan
[ 43.691067] ehci-pci 0000:00:01.0: can't setup: -110
[ 43.692424] ehci-pci 0000:00:01.0: init 0000:00:01.0 fail, -110
Why is that? Is QEMU just missing some bits or there is some fundamental
issue which I just do not see? Thanks!
--
Alexey