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RE: [Xen-devel] [VTD][PATCH] Do FLR of assigned devices with VT-d

That's a good addition, why moving this functionality to the hypervisor?
BTW, can you give real world example where this was needed?


> -----Original Message-----
> From: xen-devel-bounces@xxxxxxxxxxxxxxxxxxx 
> [mailto:xen-devel-bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of 
> Han, Weidong
> Sent: Thursday, January 24, 2008 4:39 AM
> To: xen-devel@xxxxxxxxxxxxxxxxxxx
> Cc: Xu, Anthony; Kay,Allen M
> Subject: [Xen-devel] [VTD][PATCH] Do FLR of assigned devices with VT-d
> Currently there is a pdev_flr() function to do FLR before 
> device assignment in qemu, but most of devices don't have FLR 
> capability.
> What's more, should do FLR before assignment and deassignment 
> for keeping correct device status. If the device doesn't have 
> FLR capablility, this patch implemented to enter D3hot and 
> return to D0 to do FLR. And exposed pdev_flr() in VT-d utils, 
> then it can be invoked by assignment and deassignment functions. 
> Signed-off-by: Weidong Han <weidong.han@xxxxxxxxx>
> Signed-off-by: Anthony Xu <anthony.xu@xxxxxxxxx>

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