lkml.org 
[lkml]   [2019]   [Mar]   [14]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
Subject[PATCH v2 2/7] iommu/vt-d: Implement apply_resv_region for reserving IOVA ranges
From
Date
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 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
\
 
 \ /
  Last update: 2019-03-14 12:59    [W:0.237 / U:9.988 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site