[Patch v8 06/10] iommu: Pass domain to sva_unbind_gpasid()

[Liu Yi L <yi.l.liu@intel.com>]

From: Yi Sun <yi.y.sun@intel.com>

Current interface is good enough for SVA virtualization on an assigned
physical PCI device, but when it comes to mediated devices, a physical
device may be attached with multiple aux-domains. Also, for guest unbind,
the PASID to be unbind should be allocated to the VM. This check requires
to know the ioasid_set which is associated with the domain.

So this interface needs to pass in domain info. Then the iommu driver is
able to know which domain will be used for the 2nd stage translation of
the nesting mode and also be able to do PASID ownership check. This patch
passes @domain per the above reason.

Cc: Kevin Tian <kevin.tian@intel.com>
CC: Jacob Pan <jacob.jun.pan@linux.intel.com>
Cc: Alex Williamson <alex.williamson@redhat.com>
Cc: Eric Auger <eric.auger@redhat.com>
Cc: Jean-Philippe Brucker <jean-philippe@linaro.org>
Cc: Joerg Roedel <joro@8bytes.org>
Cc: Lu Baolu <baolu.lu@linux.intel.com>
Signed-off-by: Yi Sun <yi.y.sun@intel.com>
Signed-off-by: Liu Yi L <yi.l.liu@intel.com>
---
v7 -> v8:
*) tweaked the commit message.

v6 -> v7:
*) correct the link for the details of modifying pasid prototype to bve "u32".
*) hold off r-b from Eric Auger as there is modification in this patch, will
   seek r-b in this version.

v5 -> v6:
*) use "u32" prototype for @pasid.
*) add review-by from Eric Auger.

v2 -> v3:
*) pass in domain info only
*) use u32 for pasid instead of int type

v1 -> v2:
*) added in v2.
---
 drivers/iommu/intel/svm.c   | 3 ++-
 drivers/iommu/iommu.c       | 2 +-
 include/linux/intel-iommu.h | 3 ++-
 include/linux/iommu.h       | 3 ++-
 4 files changed, 7 insertions(+), 4 deletions(-)

diff --git a/drivers/iommu/intel/svm.c b/drivers/iommu/intel/svm.c
index 561d011c7287..7521b4aefd16 100644
--- a/drivers/iommu/intel/svm.c
+++ b/drivers/iommu/intel/svm.c
@@ -496,7 +496,8 @@ int intel_svm_bind_gpasid(struct iommu_domain *domain, struct device *dev,
 	return ret;
 }
 
-int intel_svm_unbind_gpasid(struct device *dev, u32 pasid)
+int intel_svm_unbind_gpasid(struct iommu_domain *domain,
+			    struct device *dev, u32 pasid)
 {
 	struct intel_iommu *iommu = device_to_iommu(dev, NULL, NULL);
 	struct intel_svm_dev *sdev;
diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c
index d46f103a1e4b..822e485683ae 100644
--- a/drivers/iommu/iommu.c
+++ b/drivers/iommu/iommu.c
@@ -2185,7 +2185,7 @@ int iommu_sva_unbind_gpasid(struct iommu_domain *domain, struct device *dev,
 	if (unlikely(!domain->ops->sva_unbind_gpasid))
 		return -ENODEV;
 
-	return domain->ops->sva_unbind_gpasid(dev, pasid);
+	return domain->ops->sva_unbind_gpasid(domain, dev, pasid);
 }
 EXPORT_SYMBOL_GPL(iommu_sva_unbind_gpasid);
 
diff --git a/include/linux/intel-iommu.h b/include/linux/intel-iommu.h
index 554aa946f142..aaf403966444 100644
--- a/include/linux/intel-iommu.h
+++ b/include/linux/intel-iommu.h
@@ -755,7 +755,8 @@ extern int intel_svm_enable_prq(struct intel_iommu *iommu);
 extern int intel_svm_finish_prq(struct intel_iommu *iommu);
 int intel_svm_bind_gpasid(struct iommu_domain *domain, struct device *dev,
 			  struct iommu_gpasid_bind_data *data);
-int intel_svm_unbind_gpasid(struct device *dev, u32 pasid);
+int intel_svm_unbind_gpasid(struct iommu_domain *domain,
+			    struct device *dev, u32 pasid);
 struct iommu_sva *intel_svm_bind(struct device *dev, struct mm_struct *mm,
 				 void *drvdata);
 void intel_svm_unbind(struct iommu_sva *handle);
diff --git a/include/linux/iommu.h b/include/linux/iommu.h
index 5e7fe519430a..4840217a590b 100644
--- a/include/linux/iommu.h
+++ b/include/linux/iommu.h
@@ -299,7 +299,8 @@ struct iommu_ops {
 	int (*sva_bind_gpasid)(struct iommu_domain *domain,
 			struct device *dev, struct iommu_gpasid_bind_data *data);
 
-	int (*sva_unbind_gpasid)(struct device *dev, u32 pasid);
+	int (*sva_unbind_gpasid)(struct iommu_domain *domain,
+				 struct device *dev, u32 pasid);
 
 	int (*def_domain_type)(struct device *dev);
 
-- 
2.25.1

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