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Subject[RFC PATCH 03/10] iommu/vt-d: Allocate groups for mediated devices
Date
With the Intel IOMMU supporting PASID granularity isolation and
protection, a mediated device could be isolated and protected by
an IOMMU unit. We need to allocate a new group instead of a PCI
group.

Cc: Ashok Raj <ashok.raj@intel.com>
Cc: Jacob Pan <jacob.jun.pan@linux.intel.com>
Cc: Kevin Tian <kevin.tian@intel.com>
Cc: Liu Yi L <yi.l.liu@intel.com>
Signed-off-by: Sanjay Kumar <sanjay.k.kumar@intel.com>
Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
---
drivers/iommu/intel-iommu.c | 13 ++++++++++++-
1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c
index 3ede34a..57ccfc4 100644
--- a/drivers/iommu/intel-iommu.c
+++ b/drivers/iommu/intel-iommu.c
@@ -5276,6 +5276,17 @@ static void intel_iommu_put_resv_regions(struct device *dev,
}
}

+static struct iommu_group *intel_iommu_device_group(struct device *dev)
+{
+ if (dev_is_pci(dev))
+ return pci_device_group(dev);
+
+ if (dev_is_mdev(dev))
+ return iommu_group_alloc();
+
+ return ERR_PTR(-EINVAL);
+}
+
#ifdef CONFIG_INTEL_IOMMU_SVM
int intel_iommu_enable_pasid(struct intel_iommu *iommu, struct intel_svm_dev *sdev)
{
@@ -5370,7 +5381,7 @@ 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,
- .device_group = pci_device_group,
+ .device_group = intel_iommu_device_group,
.pgsize_bitmap = INTEL_IOMMU_PGSIZES,
};

--
2.7.4
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