[Xen-devel] xc_evtchn_status fails with EFAULT on HVM, the same on PV works

[Marek Marczykowski-Górecki <marmarek@xxxxxxxxxxxxxxxxxxxxxx>]

Hi,

I have a strange problem - xc_evtchn_status fails when running in HVM,
while exactly the same code (same kernel, same application etc) works
fine in PV. I've narrowed it down to copy_from_guest call in
common/event_channel.c, but no idea why it fails there. Xen version is
4.8.0. kernel is kernel-4.8.13-100.fc23. Any idea?

-- 
Best Regards,
Marek Marczykowski-Górecki
Invisible Things Lab
A: Because it messes up the order in which people normally read text.
Q: Why is top-posting such a bad thing?

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