Used by iommu.c before creating identity mappings for reserved ranges to ensure dma-ops won't ever remap these ranges
Signed-off-by: James Sewart <jamessew...@arista.com> --- drivers/iommu/intel-iommu.c | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c index 78188bf7e90d..8e0a4e2ff77f 100644 --- a/drivers/iommu/intel-iommu.c +++ b/drivers/iommu/intel-iommu.c @@ -5299,6 +5299,19 @@ static void intel_iommu_put_resv_regions(struct device *dev, } } +static void intel_iommu_apply_resv_region(struct device *dev, + struct iommu_domain *domain, + struct iommu_resv_region *region) +{ + struct dmar_domain *dmar_domain = to_dmar_domain(domain); + unsigned long start, end; + + start = IOVA_PFN(region->start); + end = IOVA_PFN(region->start + region->length - 1); + + WARN_ON_ONCE(reserve_iova(&dmar_domain->iovad, start, end) == NULL); +} + #ifdef CONFIG_INTEL_IOMMU_SVM int intel_iommu_enable_pasid(struct intel_iommu *iommu, struct intel_svm_dev *sdev) { @@ -5392,6 +5405,7 @@ const struct iommu_ops intel_iommu_ops = { .remove_device = intel_iommu_remove_device, .get_resv_regions = intel_iommu_get_resv_regions, .put_resv_regions = intel_iommu_put_resv_regions, + .apply_resv_region = intel_iommu_apply_resv_region, .device_group = pci_device_group, .pgsize_bitmap = INTEL_IOMMU_PGSIZES, }; -- 2.17.1 _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu