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-rw-r--r--drivers/iommu/intel-iommu.c6
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 */