RE: [Xen-ia64-devel] Keyboard and Mouse are disable in Xen0 terminal

["Tian, Kevin" <kevin.tian@xxxxxxxxx>]

Hi, Kangkang,
        This phenomenon is rooted caused by Rev 10373 which adds 
mfn_to_local_pfn to xen/ia64. The problem is that this inline function 
is implemented on top of mfn_to_pfn (dummy passthrough) instead 
of mfn_to_pfn_for_dma, while the place to call mfn_to_local_pfn is in 
swiotlb. Not sure why only USB device is affected by this bug.

        Yes, the quick solution can be to use mfn_to_pfn_for_dma version 
for now. However this interface may be also used by places without 
dma requirement where requires the VP concept. Maybe time for 
considering real p!=m model instead of the VP model in the middle? 
Considering two set of interfaces existing to accommodate VP and 
p!=m difference which really confuses people and error prone like this 
bug. Isaku, how about your opinion?

Thanks,
Kevin

>From: You,Yongkang
>Sent: 2006年6月19日 17:22
>To: xen-ia64-devel@xxxxxxxxxxxxxxxxxxx
>Subject: [Xen-ia64-devel] Keyboard and Mouse are disable in Xen0
>terminal
>
>Hi all,
>
>This is the new issue. We found it in latest Changeset. But Keyboard and
>Mouse can be operated at least in Changeset 10273. I can use ssh or
>telnet to control Xen0.
>
>Best Regards,
>Yongkang (Kangkang) 永康
>

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