iommu/vt-d: Honour intel_iommu=sp_off for non-VMM domains

Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>

1 files changed, 5 insertions, 1 deletions

diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c
index f5934fc2bbcc..c3d4bc91a189 100644
--- a/drivers/iommu/intel-iommu.c
+++ b/drivers/iommu/intel-iommu.c
@@ -1624,7 +1624,11 @@ static int domain_init(struct dmar_domain *domain, int guest_width)
         else
                 domain->iommu_snooping = 0;
 
-        domain->iommu_superpage = fls(cap_super_page_val(iommu->cap));
+        if (intel_iommu_superpage)
+                domain->iommu_superpage = fls(cap_super_page_val(iommu->cap));
+        else
+                domain->iommu_superpage = 0;
+
         domain->nid = iommu->node;
 
         /* always allocate the top pgd */