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Re: [Xen-devel] Secondary bus reset for VT-d device

  • To: "Cui, Dexuan" <dexuan.cui@xxxxxxxxx>
  • From: "Neo Jia" <neojia@xxxxxxxxx>
  • Date: Thu, 28 Aug 2008 22:38:04 -0700
  • Cc: xen-devel@xxxxxxxxxxxxxxxxxxx, "Han, Weidong" <weidong.han@xxxxxxxxx>
  • Delivery-date: Thu, 28 Aug 2008 22:38:26 -0700
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Just want to get some flexibility for testing.

If Xen do it automatically, is there any log for this?


2008/8/28 Cui, Dexuan <dexuan.cui@xxxxxxxxx>:
> I think we should not trigger it manually. What's the purpose?
> If you use setpci to do SecondaryBusReset directly, all the devices behind 
> the bridge are reset suddenly while xend/Dom0/Xen don't know that...
> We don't check if "the host BARs are enabled" or not.
> -- Dexuan
> -----Original Message-----
> From: Neo Jia [mailto:neojia@xxxxxxxxx]
> Sent: 2008年8月29日 13:16
> To: Cui, Dexuan
> Cc: xen-devel@xxxxxxxxxxxxxxxxxxx; Han, Weidong
> Subject: Re: [Xen-devel] Secondary bus reset for VT-d device
> Can I trigger it manually? What happens if I just use setpci to do a
> "secondary bus reset"? Will Xen be able to check if the host BARs are
> enabled for the device before putting it into the guest?
> Thanks,
> Neo

I would remember that if researchers were not ambitious
probably today we haven't the technology we are using!
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