Messages in this thread Patch in this message | | | From | Tina Zhang <> | Subject | [PATCH v9 1/5] iommu/vt-d: Remove mm->pasid in intel_sva_bind_mm() | Date | Wed, 18 Oct 2023 13:06:36 +0800 |
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The pasid is passed in as a parameter through .set_dev_pasid() callback. Thus, intel_sva_bind_mm() can directly use it instead of retrieving the pasid value from mm->pasid.
Suggested-by: Lu Baolu <baolu.lu@linux.intel.com> Reviewed-by: Lu Baolu <baolu.lu@linux.intel.com> Reviewed-by: Jason Gunthorpe <jgg@nvidia.com> Signed-off-by: Tina Zhang <tina.zhang@intel.com> --- drivers/iommu/intel/svm.c | 14 +++++++------- 1 file changed, 7 insertions(+), 7 deletions(-)
diff --git a/drivers/iommu/intel/svm.c b/drivers/iommu/intel/svm.c index 50a481c895b8..3c531af58658 100644 --- a/drivers/iommu/intel/svm.c +++ b/drivers/iommu/intel/svm.c @@ -290,21 +290,22 @@ static int pasid_to_svm_sdev(struct device *dev, unsigned int pasid, } static int intel_svm_bind_mm(struct intel_iommu *iommu, struct device *dev, - struct mm_struct *mm) + struct iommu_domain *domain, ioasid_t pasid) { struct device_domain_info *info = dev_iommu_priv_get(dev); + struct mm_struct *mm = domain->mm; struct intel_svm_dev *sdev; struct intel_svm *svm; unsigned long sflags; int ret = 0; - svm = pasid_private_find(mm->pasid); + svm = pasid_private_find(pasid); if (!svm) { svm = kzalloc(sizeof(*svm), GFP_KERNEL); if (!svm) return -ENOMEM; - svm->pasid = mm->pasid; + svm->pasid = pasid; svm->mm = mm; INIT_LIST_HEAD_RCU(&svm->devs); @@ -342,7 +343,7 @@ static int intel_svm_bind_mm(struct intel_iommu *iommu, struct device *dev, /* Setup the pasid table: */ sflags = cpu_feature_enabled(X86_FEATURE_LA57) ? PASID_FLAG_FL5LP : 0; - ret = intel_pasid_setup_first_level(iommu, dev, mm->pgd, mm->pasid, + ret = intel_pasid_setup_first_level(iommu, dev, mm->pgd, pasid, FLPT_DEFAULT_DID, sflags); if (ret) goto free_sdev; @@ -356,7 +357,7 @@ static int intel_svm_bind_mm(struct intel_iommu *iommu, struct device *dev, free_svm: if (list_empty(&svm->devs)) { mmu_notifier_unregister(&svm->notifier, mm); - pasid_private_remove(mm->pasid); + pasid_private_remove(pasid); kfree(svm); } @@ -796,9 +797,8 @@ static int intel_svm_set_dev_pasid(struct iommu_domain *domain, { struct device_domain_info *info = dev_iommu_priv_get(dev); struct intel_iommu *iommu = info->iommu; - struct mm_struct *mm = domain->mm; - return intel_svm_bind_mm(iommu, dev, mm); + return intel_svm_bind_mm(iommu, dev, domain, pasid); } static void intel_svm_domain_free(struct iommu_domain *domain) -- 2.39.3
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