tree 04afdfdd56ad1ac6b4970be60c01a89f0ce406e2
parent 0e55856b8f2918f3a6b8caf3c72867ee88f816dd
author Suravee Suthikulpanit <suravee.suthikulpanit@amd.com> 1498469284 -0500
committer Greg Kroah-Hartman <gregkh@linuxfoundation.org> 1499258430 +0200

iommu/amd: Fix interrupt remapping when disable guest_mode

commit 84a21dbdef0b96d773599c33c2afbb002198d303 upstream.

Pass-through devices to VM guest can get updated IRQ affinity
information via irq_set_affinity() when not running in guest mode.
Currently, AMD IOMMU driver in GA mode ignores the updated information
if the pass-through device is setup to use vAPIC regardless of guest_mode.
This could cause invalid interrupt remapping.

Also, the guest_mode bit should be set and cleared only when
SVM updates posted-interrupt interrupt remapping information.

Signed-off-by: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
Cc: Joerg Roedel <jroedel@suse.de>
Fixes: d98de49a53e48 ('iommu/amd: Enable vAPIC interrupt remapping mode by default')
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>