Hi,

I've finally found what was causing long standing issue of not working
PCI passthrough for HVM domains with qemu in stubdomain (only - without
the other one in dom0). It looks to be this patch:
http://xenbits.xen.org/gitweb/?p=xen.git;a=commitdiff;h=c428c9f162895cb3473fab26d23ffbf41a6f293d;hp=dcccaf806a92eabb95929a67c344ac1e9ead6257

It calls xc_domain_getinfo from xc_domain_memory_mapping (to check if
the target domain is auto-translated), but xc_domain_getinfo fails with
EPERM in stubdomain.

What would be the best solution for this? Allowing xc_domain_getinfo
from stubdomain in xen/include/xsm/dummy.h? Currently it is uses policy
XSM_XS_PRIV in unstable and just XSM_PRIV in 4.6 - so, maybe have some
combination of XSM_XS_PRIV and XSM_DM_PRIV? Or maybe fix this by
removing xc_domain_getinfo call in xc_domain_memory_mapping, possibly
implementing the logic from that commit solely in libxl?

-- 
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?