[PATCH kernel v4 02/11] vfio/spapr: Relax the IOMMU compatibility check

From: Alexey Kardashevskiy
Date: Fri Apr 29 2016 - 05:00:07 EST


We are going to have multiple different types of PHB on the same system
with POWER8 + NVLink and PHBs will have different IOMMU ops. However
we only really care about one callback - create_table - so we can
relax the compatibility check here.

Signed-off-by: Alexey Kardashevskiy <aik@xxxxxxxxx>
Reviewed-by: David Gibson <david@xxxxxxxxxxxxxxxxxxxxx>
---
drivers/vfio/vfio_iommu_spapr_tce.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/vfio/vfio_iommu_spapr_tce.c b/drivers/vfio/vfio_iommu_spapr_tce.c
index 0582b72..3054e3f 100644
--- a/drivers/vfio/vfio_iommu_spapr_tce.c
+++ b/drivers/vfio/vfio_iommu_spapr_tce.c
@@ -1188,7 +1188,8 @@ static int tce_iommu_attach_group(void *iommu_data,
goto unlock_exit;
}
table_group_tmp = iommu_group_get_iommudata(tcegrp->grp);
- if (table_group_tmp->ops != table_group->ops) {
+ if (table_group_tmp->ops->create_table !=
+ table_group->ops->create_table) {
pr_warn("tce_vfio: Group %d is incompatible with group %d\n",
iommu_group_id(iommu_group),
iommu_group_id(tcegrp->grp));
--
2.5.0.rc3