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Subject[PATCH v2 9/9] iommu/vt-d: Store guest PASID during bind
Date
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@linux.intel.com>
---
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 d8a5efa75095..4c958b1aec4c 100644
--- a/drivers/iommu/intel/svm.c
+++ b/drivers/iommu/intel/svm.c
@@ -406,6 +406,7 @@ 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);
}
svm->iommu = iommu;
/*
@@ -517,6 +518,7 @@ int intel_svm_unbind_gpasid(struct device *dev, int pasid)
ioasid_attach_data(pasid, NULL);
ioasid_notify(pasid, IOASID_UNBIND,
IOASID_NOTIFY_SET);
+ ioasid_attach_spid(pasid, INVALID_IOASID);
kfree(svm);
}
}
--
2.7.4
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