iommu/vt-d: Enable QI on all IOMMUs before setting root entry

iommu/vt-d: Enable QI on all IOMMUs before setting root entry

commit a4c34ff1c029e90e7d5f8dd8d29b0a93b31c3cb2 upstream.

This seems to be required on some X58 chipsets on systems
with more than one IOMMU. QI does not work until it is
enabled on all IOMMUs in the system.

Reported-by: Dheeraj CVR <cvr.dheeraj@gmail.com>
Tested-by: Dheeraj CVR <cvr.dheeraj@gmail.com>
Fixes: 5f0a7f7614a9 ('iommu/vt-d: Make root entry visible for hardware right after allocation')
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>