devtlb_invalidation_with_pasid(iommu, dev, pasid);
}
+/*
+ * This function flushes cache for a newly setup pasid table entry.
+ * Caller of it should not modify the in-use pasid table entries.
+ */
static void pasid_flush_caches(struct intel_iommu *iommu,
struct pasid_entry *pte,
u32 pasid, u16 did)
if (WARN_ON(!pte))
return -EINVAL;
+ /* Caller must ensure PASID entry is not in use. */
+ if (pasid_pte_is_present(pte))
+ return -EBUSY;
+
pasid_clear_entry(pte);
/* Setup the first level page table pointer: */
return -ENODEV;
}
+ /* Caller must ensure PASID entry is not in use. */
+ if (pasid_pte_is_present(pte))
+ return -EBUSY;
+
pasid_clear_entry(pte);
pasid_set_domain_id(pte, did);
pasid_set_slptr(pte, pgd_val);
return -ENODEV;
}
+ /* Caller must ensure PASID entry is not in use. */
+ if (pasid_pte_is_present(pte))
+ return -EBUSY;
+
pasid_clear_entry(pte);
pasid_set_domain_id(pte, did);
pasid_set_address_width(pte, iommu->agaw);