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Subject[PATCH v4 7/9] iommu/vt-d: Allocate and free pasid table
Date
This patch allocates a PASID table for a PCI device at the time
when the dmar dev_info is attached to dev->archdata.iommu, and
free it in the opposite case.

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: Lu Baolu <baolu.lu@linux.intel.com>
Reviewed-by: Liu Yi L <yi.l.liu@intel.com>
---
drivers/iommu/intel-iommu.c | 10 ++++++++++
1 file changed, 10 insertions(+)

diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c
index a930918..baad27a 100644
--- a/drivers/iommu/intel-iommu.c
+++ b/drivers/iommu/intel-iommu.c
@@ -2508,6 +2508,15 @@ static struct dmar_domain *dmar_insert_one_dev_info(struct intel_iommu *iommu,
list_add(&info->global, &device_domain_list);
if (dev)
dev->archdata.iommu = info;
+
+ if (dev && dev_is_pci(dev) && info->pasid_supported) {
+ ret = intel_pasid_alloc_table(dev);
+ if (ret) {
+ __dmar_remove_one_dev_info(info);
+ spin_unlock_irqrestore(&device_domain_lock, flags);
+ return NULL;
+ }
+ }
spin_unlock_irqrestore(&device_domain_lock, flags);

if (dev && domain_context_mapping(domain, dev)) {
@@ -4873,6 +4882,7 @@ static void __dmar_remove_one_dev_info(struct device_domain_info *info)
if (info->dev) {
iommu_disable_dev_iotlb(info);
domain_context_clear(iommu, info->dev);
+ intel_pasid_free_table(info->dev);
}

unlink_domain_info(info);
--
2.7.4
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