Merging upstream version 6.9.2.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 13 insertions, 50 deletions

diff --git a/drivers/iommu/intel/svm.c b/drivers/iommu/intel/svm.c
index 4d269df008..ee3b469e2d 100644
--- a/drivers/iommu/intel/svm.c
+++ b/drivers/iommu/intel/svm.c
@@ -22,7 +22,6 @@
 #include "iommu.h"
 #include "pasid.h"
 #include "perf.h"
-#include "../iommu-sva.h"
 #include "trace.h"
 
 static irqreturn_t prq_event_thread(int irq, void *d);
@@ -315,10 +314,11 @@ out:
 	return 0;
 }
 
-static int intel_svm_bind_mm(struct intel_iommu *iommu, struct device *dev,
-			     struct iommu_domain *domain, ioasid_t pasid)
+static int intel_svm_set_dev_pasid(struct iommu_domain *domain,
+				   struct device *dev, ioasid_t pasid)
 {
 	struct device_domain_info *info = dev_iommu_priv_get(dev);
+	struct intel_iommu *iommu = info->iommu;
 	struct mm_struct *mm = domain->mm;
 	struct intel_svm_dev *sdev;
 	struct intel_svm *svm;
@@ -360,7 +360,6 @@ static int intel_svm_bind_mm(struct intel_iommu *iommu, struct device *dev,
 	sdev->iommu = iommu;
 	sdev->did = FLPT_DEFAULT_DID;
 	sdev->sid = PCI_DEVID(info->bus, info->devfn);
-	init_rcu_head(&sdev->rcu);
 	if (info->ats_enabled) {
 		sdev->qdep = info->ats_qdep;
 		if (sdev->qdep >= QI_DEV_EIOTLB_MAX_INVS)
@@ -408,13 +407,6 @@ void intel_svm_remove_dev_pasid(struct device *dev, u32 pasid)
 			if (svm->notifier.ops)
 				mmu_notifier_unregister(&svm->notifier, mm);
 			pasid_private_remove(svm->pasid);
-			/*
-			 * We mandate that no page faults may be outstanding
-			 * for the PASID when intel_svm_unbind_mm() is called.
-			 * If that is not obeyed, subtle errors will happen.
-			 * Let's make them less subtle...
-			 */
-			memset(svm, 0x6b, sizeof(*svm));
 			kfree(svm);
 		}
 	}
@@ -562,16 +554,12 @@ static int prq_to_iommu_prot(struct page_req_dsc *req)
 	return prot;
 }
 
-static int intel_svm_prq_report(struct intel_iommu *iommu, struct device *dev,
-				struct page_req_dsc *desc)
+static void intel_svm_prq_report(struct intel_iommu *iommu, struct device *dev,
+				 struct page_req_dsc *desc)
 {
-	struct iommu_fault_event event;
-
-	if (!dev || !dev_is_pci(dev))
-		return -ENODEV;
+	struct iopf_fault event = { };
 
 	/* Fill in event data for device specific processing */
-	memset(&event, 0, sizeof(struct iommu_fault_event));
 	event.fault.type = IOMMU_FAULT_PAGE_REQ;
 	event.fault.prm.addr = (u64)desc->addr << VTD_PAGE_SHIFT;
 	event.fault.prm.pasid = desc->pasid;
@@ -603,7 +591,7 @@ static int intel_svm_prq_report(struct intel_iommu *iommu, struct device *dev,
 		event.fault.prm.private_data[0] = ktime_to_ns(ktime_get());
 	}
 
-	return iommu_report_device_fault(dev, &event);
+	iommu_report_device_fault(dev, &event);
 }
 
 static void handle_bad_prq_event(struct intel_iommu *iommu,
@@ -707,12 +695,10 @@ bad_req:
 			goto bad_req;
 		}
 
-		if (intel_svm_prq_report(iommu, dev, req))
-			handle_bad_prq_event(iommu, req, QI_RESP_INVALID);
-		else
-			trace_prq_report(iommu, dev, req->qw_0, req->qw_1,
-					 req->priv_data[0], req->priv_data[1],
-					 iommu->prq_seq_number++);
+		intel_svm_prq_report(iommu, dev, req);
+		trace_prq_report(iommu, dev, req->qw_0, req->qw_1,
+				 req->priv_data[0], req->priv_data[1],
+				 iommu->prq_seq_number++);
 		mutex_unlock(&iommu->iopf_lock);
 prq_advance:
 		head = (head + sizeof(*req)) & PRQ_RING_MASK;
@@ -743,9 +729,8 @@ prq_advance:
 	return IRQ_RETVAL(handled);
 }
 
-int intel_svm_page_response(struct device *dev,
-			    struct iommu_fault_event *evt,
-			    struct iommu_page_response *msg)
+void intel_svm_page_response(struct device *dev, struct iopf_fault *evt,
+			     struct iommu_page_response *msg)
 {
 	struct device_domain_info *info = dev_iommu_priv_get(dev);
 	struct intel_iommu *iommu = info->iommu;
@@ -754,7 +739,6 @@ int intel_svm_page_response(struct device *dev,
 	bool private_present;
 	bool pasid_present;
 	bool last_page;
-	int ret = 0;
 	u16 sid;
 
 	prm = &evt->fault.prm;
@@ -763,16 +747,6 @@ int intel_svm_page_response(struct device *dev,
 	private_present = prm->flags & IOMMU_FAULT_PAGE_REQUEST_PRIV_DATA;
 	last_page = prm->flags & IOMMU_FAULT_PAGE_REQUEST_LAST_PAGE;
 
-	if (!pasid_present) {
-		ret = -EINVAL;
-		goto out;
-	}
-
-	if (prm->pasid == 0 || prm->pasid >= PASID_MAX) {
-		ret = -EINVAL;
-		goto out;
-	}
-
 	/*
 	 * Per VT-d spec. v3.0 ch7.7, system software must respond
 	 * with page group response if private data is present (PDP)
@@ -801,17 +775,6 @@ int intel_svm_page_response(struct device *dev,
 
 		qi_submit_sync(iommu, &desc, 1, 0);
 	}
-out:
-	return ret;
-}
-
-static int intel_svm_set_dev_pasid(struct iommu_domain *domain,
-				   struct device *dev, ioasid_t pasid)
-{
-	struct device_domain_info *info = dev_iommu_priv_get(dev);
-	struct intel_iommu *iommu = info->iommu;
-
-	return intel_svm_bind_mm(iommu, dev, domain, pasid);
 }
 
 static void intel_svm_domain_free(struct iommu_domain *domain)