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Message-Id: <20200422080611.15689-5-baolu.lu@linux.intel.com>
Date: Wed, 22 Apr 2020 16:06:11 +0800
From: Lu Baolu <baolu.lu@...ux.intel.com>
To: Joerg Roedel <joro@...tes.org>
Cc: ashok.raj@...el.com, jacob.jun.pan@...ux.intel.com,
Liu Yi L <yi.l.liu@...el.com>, kevin.tian@...el.com,
iommu@...ts.linux-foundation.org, linux-kernel@...r.kernel.org,
Lu Baolu <baolu.lu@...ux.intel.com>
Subject: [PATCH v3 4/4] iommu/vt-d: Remove redundant IOTLB flush
IOTLB flush already included in the PASID tear down and the page request
drain process. There is no need to flush again.
Signed-off-by: Jacob Pan <jacob.jun.pan@...ux.intel.com>
Signed-off-by: Lu Baolu <baolu.lu@...ux.intel.com>
---
drivers/iommu/intel-svm.c | 3 ---
1 file changed, 3 deletions(-)
diff --git a/drivers/iommu/intel-svm.c b/drivers/iommu/intel-svm.c
index 2534641ef707..543109fe2003 100644
--- a/drivers/iommu/intel-svm.c
+++ b/drivers/iommu/intel-svm.c
@@ -212,7 +212,6 @@ static void intel_mm_release(struct mmu_notifier *mn, struct mm_struct *mm)
list_for_each_entry_rcu(sdev, &svm->devs, list) {
intel_pasid_tear_down_entry(svm->iommu, sdev->dev, svm->pasid);
intel_svm_drain_prq(sdev->dev, svm->pasid);
- intel_flush_svm_range_dev(svm, sdev, 0, -1, 0);
}
rcu_read_unlock();
@@ -406,7 +405,6 @@ int intel_svm_unbind_gpasid(struct device *dev, int pasid)
list_del_rcu(&sdev->list);
intel_pasid_tear_down_entry(iommu, dev, svm->pasid);
intel_svm_drain_prq(dev, svm->pasid);
- intel_flush_svm_range_dev(svm, sdev, 0, -1, 0);
kfree_rcu(sdev, rcu);
if (list_empty(&svm->devs)) {
@@ -645,7 +643,6 @@ int intel_svm_unbind_mm(struct device *dev, int pasid)
* hard to be as defensive as we might like. */
intel_pasid_tear_down_entry(iommu, dev, svm->pasid);
intel_svm_drain_prq(dev, svm->pasid);
- intel_flush_svm_range_dev(svm, sdev, 0, -1, 0);
kfree_rcu(sdev, rcu);
if (list_empty(&svm->devs)) {
--
2.17.1
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