diff options
| -rw-r--r-- | drivers/iommu/intel/iommu.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/iommu/intel/iommu.c b/drivers/iommu/intel/iommu.c index f200af2233d0..23985cb5c8ee 100644 --- a/drivers/iommu/intel/iommu.c +++ b/drivers/iommu/intel/iommu.c @@ -4333,6 +4333,9 @@ static int prepare_domain_attach_device(struct iommu_domain *domain, if (!iommu) return -ENODEV; + if (dmar_domain->force_snooping && !ecap_sc_support(iommu->ecap)) + return -EOPNOTSUPP; + /* check if this iommu agaw is sufficient for max mapped address */ addr_width = agaw_to_width(iommu->agaw); if (addr_width > cap_mgaw(iommu->cap)) |