On Mon, Feb 03, 2020 at 09:33:51AM +0100, Sander Eikelenboom wrote:
> Hi Roger,
> 
> Last week I encountered an issue with the PCI-passthrough of a USB 
> controller. 
> In the guest I get:
>     [ 1143.313756] xhci_hcd 0000:00:05.0: xHCI host not responding to stop 
> endpoint command.
>     [ 1143.334825] xhci_hcd 0000:00:05.0: xHCI host controller not 
> responding, assume dead
>     [ 1143.347364] xhci_hcd 0000:00:05.0: HC died; cleaning up
>     [ 1143.356407] usb 1-2: USB disconnect, device number 2
> 
> Bisection turned up as the culprit: 
>    commit 5500d265a2a8fa63d60c08beb549de8ec82ff7a5
>    x86/smp: use APIC ALLBUT destination shorthand when possible

Sorry to hear that, let see if we can figure out what's wrong.

> I verified by reverting that commit and now it works fine again.

Does the same controller work fine when used in dom0?

Thanks, Roger.

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