[PATCH v3 14/14] iommu/vt-d: Store guest PASID during bind
From: Jacob Pan <hidden>
Date: 2020-09-28 21:37:17
Also in:
linux-iommu, lkml
Subsystem:
intel iommu (vt-d), iommu subsystem, the rest · Maintainers:
David Woodhouse, Lu Baolu, Joerg Roedel, Will Deacon, Linus Torvalds
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 <redacted> --- 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