tree 36db26e700bfa17f56a30ef05b4092372149e147
parent e8bb910d1bbc65e7081e73aab4b3a3dd8630332c
author Fenghua Yu <fenghua.yu@intel.com> 1257952986 -0800
committer David Woodhouse <David.Woodhouse@intel.com> 1257992925 +0000

intel-iommu: Support PCIe hot-plug

To support PCIe hot plug in IOMMU, we register a notifier to respond to device
change action.

When the notifier gets BUS_NOTIFY_UNBOUND_DRIVER, it removes the device
from its DMAR domain.

A hot added device will be added into an IOMMU domain when it first does IOMMU
op. So there is no need to add more code for hot add.

Without the patch, after a hot-remove, a hot-added device on the same
slot will not work.

Signed-off-by: Fenghua Yu <fenghua.yu@intel.com>
Tested-by: Yinghai Lu <yinghai@kernel.org>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>