[PATCH rc 4/8] iommu/vt-d: Update iotlb in nested domain attach

[Yi Liu]

Should call domain_update_iotlb() to update the has_iotlb_device flag
of the domain after attaching device to nested domain. Without it, this
flag is not set properly and would result in missing device TLB flush.

Fixes: 9838f2bb6b6b ("iommu/vt-d: Set the nested domain to a device")
Signed-off-by: Yi Liu <yi.l....@intel.com>
---
 drivers/iommu/intel/iommu.c  | 4 +---
 drivers/iommu/intel/iommu.h  | 1 +
 drivers/iommu/intel/nested.c | 2 ++
 3 files changed, 4 insertions(+), 3 deletions(-)

diff --git a/drivers/iommu/intel/iommu.c b/drivers/iommu/intel/iommu.c
index 46174ff5ae22..b1ceebe13107 100644
--- a/drivers/iommu/intel/iommu.c
+++ b/drivers/iommu/intel/iommu.c
@@ -396,8 +396,6 @@ static int domain_update_device_node(struct dmar_domain 
*domain)
        return nid;
 }
 
-static void domain_update_iotlb(struct dmar_domain *domain);
-
 /* Return the super pagesize bitmap if supported. */
 static unsigned long domain_super_pgsize_bitmap(struct dmar_domain *domain)
 {
@@ -1218,7 +1216,7 @@ domain_lookup_dev_info(struct dmar_domain *domain,
        return NULL;
 }
 
-static void domain_update_iotlb(struct dmar_domain *domain)
+void domain_update_iotlb(struct dmar_domain *domain)
 {
        struct dev_pasid_info *dev_pasid;
        struct device_domain_info *info;
diff --git a/drivers/iommu/intel/iommu.h b/drivers/iommu/intel/iommu.h
index 9b27edb73aa9..4145c04cb1c6 100644
--- a/drivers/iommu/intel/iommu.h
+++ b/drivers/iommu/intel/iommu.h
@@ -1066,6 +1066,7 @@ int qi_submit_sync(struct intel_iommu *iommu, struct 
qi_desc *desc,
  */
 #define QI_OPT_WAIT_DRAIN              BIT(0)
 
+void domain_update_iotlb(struct dmar_domain *domain);
 int domain_attach_iommu(struct dmar_domain *domain, struct intel_iommu *iommu);
 void domain_detach_iommu(struct dmar_domain *domain, struct intel_iommu 
*iommu);
 void device_block_translation(struct device *dev);
diff --git a/drivers/iommu/intel/nested.c b/drivers/iommu/intel/nested.c
index 42d4d222e70f..f068ecf72f5a 100644
--- a/drivers/iommu/intel/nested.c
+++ b/drivers/iommu/intel/nested.c
@@ -65,6 +65,8 @@ static int intel_nested_attach_dev(struct iommu_domain 
*domain,
        list_add(&info->link, &dmar_domain->devices);
        spin_unlock_irqrestore(&dmar_domain->lock, flags);
 
+       domain_update_iotlb(dmar_domain);
+
        return 0;
 }
 
-- 
2.34.1