[Xen-devel] Sharing information between Driver Domain and hypervisor

[Amod <amodjaltade@xxxxxxxxx>]

Hello,

I want to share some information between a driver domain for a NIC and the hypervisor, for eg, the number of packets transferred etc.

To do this, I am using the HYPERVISOR_shared_info in the netback driver, within the IDD to store the count of number of packets transferred. I have added some extra fields in the shared_info structure to suit my purpose.

I want to transfer this packet count from netback to the hypervisor. 

As i understand, the HYPERVISOR_shared_info page of a domain is shared as shared_info in the struct domain (defined in sched.h). 

But, the data is not propagating from the netback driver to the hypervisor. Even though the packet count in IDD's HYPERVISOR_shared_info is increasing, the packet count in domain->shared_info does not change.

What am i missing here ? or is there a better way to do this ?

Thanks in advance !

--
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   With Regards ,
       Amod Jaltade

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