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| author | James Sewart <jamessewart@arista.com> | 2019-05-25 13:41:23 +0800 |
|---|---|---|
| committer | Joerg Roedel <jroedel@suse.de> | 2019-05-27 16:56:43 +0200 |
| commit | 73bcbdc9fa8d88db2d26d06885fb180cfe478f80 (patch) | |
| tree | 1362153e6cab4a82c0b2d0787a52af5c48923ea8 /drivers/iommu/intel-iommu.c | |
| parent | 7423e01741dd6a5f1255f589145313f0fb1c8cbe (diff) | |
| download | linux-73bcbdc9fa8d88db2d26d06885fb180cfe478f80.tar.bz2 | |
iommu/vt-d: Implement apply_resv_region iommu ops entry
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>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Diffstat (limited to 'drivers/iommu/intel-iommu.c')
| -rw-r--r-- | drivers/iommu/intel-iommu.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c index 9722c2ffe428..3995afc59c28 100644 --- a/drivers/iommu/intel-iommu.c +++ b/drivers/iommu/intel-iommu.c @@ -5549,6 +5549,19 @@ 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) { @@ -5714,6 +5727,7 @@ 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, |