tree 8bdd77fa9fb110e50905093c746c3f70e62cb2ba
parent 853dafb62b386a3a75808483a120998e734eb6e1
author Sheng Yang <sheng@linux.intel.com> 1225427861 +0800
committer Avi Kivity <avi@redhat.com> 1230735109 +0200

KVM: Enable Function Level Reset for assigned device

Ideally, every assigned device should in a clear condition before and after
assignment, so that the former state of device won't affect later work.
Some devices provide a mechanism named Function Level Reset, which is
defined in PCI/PCI-e document. We should execute it before and after device
assignment.

(But sadly, the feature is new, and most device on the market now don't
support it. We are considering using D0/D3hot transmit to emulate it later,
but not that elegant and reliable as FLR itself.)

[Update: Reminded by Xiantao, execute FLR after we ensure that the device can
be assigned to the guest.]

Signed-off-by: Sheng Yang <sheng@linux.intel.com>
Signed-off-by: Avi Kivity <avi@redhat.com>