Messages in this thread Patch in this message | | | From | Lu Baolu <> | Subject | [PATCH v3 2/8] iommu/vt-d: Implement apply_resv_region iommu ops entry | Date | Mon, 29 Apr 2019 10:09:19 +0800 |
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From: James Sewart <jamessewart@arista.com>
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 <jamessewart@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 e0c0febc6fa5..af025955f1bc 100644 --- a/drivers/iommu/intel-iommu.c +++ b/drivers/iommu/intel-iommu.c @@ -5568,6 +5568,19 @@ int intel_iommu_enable_pasid(struct intel_iommu *iommu, struct device *dev) return ret; } +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)); +} + #ifdef CONFIG_INTEL_IOMMU_SVM struct intel_iommu *intel_svm_device_to_iommu(struct device *dev) { @@ -5733,6 +5746,7 @@ 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, .dev_has_feat = intel_iommu_dev_has_feat, .dev_feat_enabled = intel_iommu_dev_feat_enabled, -- 2.17.1
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