iommu/vt-d: Allocate and free pasid table

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>
Signed-off-by: Joerg Roedel <jroedel@suse.de>

diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c
index 211925a..2d68e84 100644 (file)
--- a/drivers/iommu/intel-iommu.c
+++ b/drivers/iommu/intel-iommu.c
@@ -2509,6 +2509,15 @@ 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)) {
@@ -4843,6 +4852,7 @@ 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);