[PATCH v3 14/14] iommu/vt-d: Store guest PASID during bind

[Jacob Pan <jacob.pan.linux@xxxxxxxxx>]

IOASID core maintains the guest-host mapping in the form of SPID and
IOASID. This patch assigns the guest PASID (if valid) as SPID while
binding guest page table with a host PASID. This mapping will be used
for lookup and notifications.

Signed-off-by: Jacob Pan <jacob.jun.pan@xxxxxxxxxxxxxxx>
---
 drivers/iommu/intel/svm.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/iommu/intel/svm.c b/drivers/iommu/intel/svm.c
index 8f886718df83..e18f8b5af9ba 100644
--- a/drivers/iommu/intel/svm.c
+++ b/drivers/iommu/intel/svm.c
@@ -98,6 +98,7 @@ static inline bool intel_svm_capable(struct intel_iommu *iommu)
 static inline void intel_svm_drop_pasid(ioasid_t pasid)
 {
 	ioasid_detach_data(pasid);
+	ioasid_detach_spid(pasid);
 	ioasid_put(NULL, pasid);
 }
 
@@ -425,6 +426,7 @@ int intel_svm_bind_gpasid(struct iommu_domain *domain, struct device *dev,
 		if (data->flags & IOMMU_SVA_GPASID_VAL) {
 			svm->gpasid = data->gpasid;
 			svm->flags |= SVM_FLAG_GUEST_PASID;
+			ioasid_attach_spid(data->hpasid, data->gpasid);
 		}
 		ioasid_attach_data(data->hpasid, svm);
 		ioasid_get(NULL, svm->pasid);
-- 
2.7.4