diff options
| -rw-r--r-- | drivers/iommu/intel/iommu.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/drivers/iommu/intel/iommu.c b/drivers/iommu/intel/iommu.c index 65c2ed760060..b0ba187cb7f8 100644 --- a/drivers/iommu/intel/iommu.c +++ b/drivers/iommu/intel/iommu.c @@ -4757,6 +4757,13 @@ static int prepare_domain_attach_device(struct iommu_domain *domain, if (!iommu) return -ENODEV; + if ((dmar_domain->flags & DOMAIN_FLAG_NESTING_MODE) && + !ecap_nest(iommu->ecap)) { + dev_err(dev, "%s: iommu not support nested translation\n", + iommu->name); + return -EINVAL; + } + /* 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)) @@ -5457,7 +5464,7 @@ intel_iommu_enable_nesting(struct iommu_domain *domain) int ret = -ENODEV; spin_lock_irqsave(&device_domain_lock, flags); - if (nested_mode_support() && list_empty(&dmar_domain->devices)) { + if (list_empty(&dmar_domain->devices)) { dmar_domain->flags |= DOMAIN_FLAG_NESTING_MODE; dmar_domain->flags &= ~DOMAIN_FLAG_USE_FIRST_LEVEL; ret = 0; |