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Message-Id: <20190130055758.3994-2-peterx@redhat.com>
Date: Wed, 30 Jan 2019 13:57:57 +0800
From: Peter Xu <peterx@...hat.com>
To: iommu@...ts.linux-foundation.org, linux-kernel@...r.kernel.org
Cc: joro@...tes.org, Jason Wang <jasowang@...hat.com>,
peterx@...hat.com, Jerome Glisse <jglisse@...hat.com>
Subject: [PATCH 1/2] iommu/vt-d: Remove change_pte notifier
The change_pte() interface is tailored for PFN updates, while the
other notifier invalidate_range() should be enough for Intel IOMMU
cache flushing. Actually we've done similar thing for AMD IOMMU
already in 8301da53fbc1 ("iommu/amd: Remove change_pte mmu_notifier
call-back", 2014-07-30) but the Intel IOMMU driver still have it.
Signed-off-by: Peter Xu <peterx@...hat.com>
---
drivers/iommu/intel-svm.c | 9 ---------
1 file changed, 9 deletions(-)
diff --git a/drivers/iommu/intel-svm.c b/drivers/iommu/intel-svm.c
index a2a2aa4439aa..e9fd3ca057ac 100644
--- a/drivers/iommu/intel-svm.c
+++ b/drivers/iommu/intel-svm.c
@@ -180,14 +180,6 @@ static void intel_flush_svm_range(struct intel_svm *svm, unsigned long address,
rcu_read_unlock();
}
-static void intel_change_pte(struct mmu_notifier *mn, struct mm_struct *mm,
- unsigned long address, pte_t pte)
-{
- struct intel_svm *svm = container_of(mn, struct intel_svm, notifier);
-
- intel_flush_svm_range(svm, address, 1, 1, 0);
-}
-
/* Pages have been freed at this point */
static void intel_invalidate_range(struct mmu_notifier *mn,
struct mm_struct *mm,
@@ -227,7 +219,6 @@ static void intel_mm_release(struct mmu_notifier *mn, struct mm_struct *mm)
static const struct mmu_notifier_ops intel_mmuops = {
.release = intel_mm_release,
- .change_pte = intel_change_pte,
.invalidate_range = intel_invalidate_range,
};
--
2.17.1
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