diff options
| author | Lu Baolu <baolu.lu@linux.intel.com> | 2018-07-14 09:46:55 +0200 |
|---|---|---|
| committer | Joerg Roedel <jroedel@suse.de> | 2018-07-20 14:44:23 +0200 |
| commit | 51261aac51a05c791ef880a100ac2ceed201ef72 (patch) | |
| tree | 427a95318d407d446d98ede3381c794a4a29599b /drivers/iommu/intel-svm.c | |
| parent | iommu/vt-d: Global PASID name space (diff) | |
| download | linux-51261aac51a05c791ef880a100ac2ceed201ef72.tar.xz linux-51261aac51a05c791ef880a100ac2ceed201ef72.zip | |
iommu/vt-d: Avoid using idr_for_each_entry()
idr_for_each_entry() is used to iteratte over idr elements
of a given type. It isn't suitable for the globle pasid idr
since the pasid idr consumer could specify different types
of pointers to bind with a pasid.
Cc: Ashok Raj <ashok.raj@intel.com>
Cc: Jacob Pan <jacob.jun.pan@linux.intel.com>
Cc: Kevin Tian <kevin.tian@intel.com>
Cc: Liu Yi L <yi.l.liu@intel.com>
Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Reviewed-by: Liu Yi L <yi.l.liu@intel.com>
Reviewed-by: Peter Xu <peterx@redhat.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Diffstat (limited to 'drivers/iommu/intel-svm.c')
| -rw-r--r-- | drivers/iommu/intel-svm.c | 14 |
1 files changed, 10 insertions, 4 deletions
diff --git a/drivers/iommu/intel-svm.c b/drivers/iommu/intel-svm.c index 2cc0aac93201..36cc1d1b8afc 100644 --- a/drivers/iommu/intel-svm.c +++ b/drivers/iommu/intel-svm.c @@ -298,6 +298,7 @@ static const struct mmu_notifier_ops intel_mmuops = { }; static DEFINE_MUTEX(pasid_mutex); +static LIST_HEAD(global_svm_list); int intel_svm_bind_mm(struct device *dev, int *pasid, int flags, struct svm_dev_ops *ops) { @@ -329,13 +330,13 @@ int intel_svm_bind_mm(struct device *dev, int *pasid, int flags, struct svm_dev_ mutex_lock(&pasid_mutex); if (pasid && !(flags & SVM_FLAG_PRIVATE_PASID)) { - int i; + struct intel_svm *t; - idr_for_each_entry(&iommu->pasid_idr, svm, i) { - if (svm->mm != mm || - (svm->flags & SVM_FLAG_PRIVATE_PASID)) + list_for_each_entry(t, &global_svm_list, list) { + if (t->mm != mm || (t->flags & SVM_FLAG_PRIVATE_PASID)) continue; + svm = t; if (svm->pasid >= pasid_max) { dev_warn(dev, "Limited PASID width. Cannot use existing PASID %d\n", @@ -404,6 +405,7 @@ int intel_svm_bind_mm(struct device *dev, int *pasid, int flags, struct svm_dev_ svm->mm = mm; svm->flags = flags; INIT_LIST_HEAD_RCU(&svm->devs); + INIT_LIST_HEAD(&svm->list); ret = -ENOMEM; if (mm) { ret = mmu_notifier_register(&svm->notifier, mm); @@ -430,6 +432,8 @@ int intel_svm_bind_mm(struct device *dev, int *pasid, int flags, struct svm_dev_ */ if (cap_caching_mode(iommu->cap)) intel_flush_pasid_dev(svm, sdev, svm->pasid); + + list_add_tail(&svm->list, &global_svm_list); } list_add_rcu(&sdev->list, &svm->devs); @@ -485,6 +489,8 @@ int intel_svm_unbind_mm(struct device *dev, int pasid) if (svm->mm) mmu_notifier_unregister(&svm->notifier, svm->mm); + list_del(&svm->list); + /* 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. |