xend: pass-through: fix "xm pci-list-assignable-devices' for pv_guest
xc.test_assign_device(dev) can only tell us if dev is assigned to hvm
guest; if a device is assigned to pv guest, xc.test_assign_device()
still tells us the device is not assigned yet, as a result, the device
still appears in the output of "xm pci-list-assignable-devices", and
xend would not prevent us from assigning the device to a new pv or hvm
guest.
To judge if a device has been assigned to guest, we have to scan
xenstore.
Signed-off-by: Dexuan Cui <dexuan.cui@intel.com>
projects / xen.git / commit