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[Qemu-devel] [Bug 1579306] Re: usb-uas does not work in Windows (10) gue

From: Tom Yan
Subject: [Qemu-devel] [Bug 1579306] Re: usb-uas does not work in Windows (10) guest
Date: Sat, 07 May 2016 05:54:45 -0000

Not sure if it's relevant, but when I try completely passthrough a UASP
device to the VM through usb-host, only the BOT/MSC part is exposed.
This is not the case when I do the same thing to a Linux guest (btw usb-
uas apparently works fine in Linux guest as well).

** Attachment added: "xhci-host.png"

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  usb-uas does not work in Windows (10) guest

Status in QEMU:

Bug description:
  When I attach a "-device usb-uas" to a VM with Windows 10 10586, the
  device fail to start with the following error in the guest:

  "The device cannot start. (Code 10)

  {Operation Failed}
  The requested operation was unsuccessful"

  If the host controller is nec-usb-xhci, there will be two of the
  following error on the terminal of the host as well:

  "qemu-system-x86_64: usb_uas_handle_control: unhandled control

  If it's usb-ehci, ich9-usb-ehci1 or ich9-usb-echi2, this will not show
  up on the host side, but the device stil fails with the same error on
  the guest side.

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