diff options
Diffstat (limited to 'drivers/iommu/intel-svm.c')
| -rw-r--r-- | drivers/iommu/intel-svm.c | 25 |
1 files changed, 16 insertions, 9 deletions
diff --git a/drivers/iommu/intel-svm.c b/drivers/iommu/intel-svm.c index 8f87304f915c..780de0caafe8 100644 --- a/drivers/iommu/intel-svm.c +++ b/drivers/iommu/intel-svm.c @@ -1,15 +1,7 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * Copyright © 2015 Intel Corporation. * - * This program is free software; you can redistribute it and/or modify it - * under the terms and conditions of the GNU General Public License, - * version 2, as published by the Free Software Foundation. - * - * This program is distributed in the hope it will be useful, but WITHOUT - * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or - * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for - * more details. - * * Authors: David Woodhouse <dwmw2@infradead.org> */ @@ -374,6 +366,21 @@ int intel_svm_bind_mm(struct device *dev, int *pasid, int flags, struct svm_dev_ } list_add_tail(&svm->list, &global_svm_list); + } else { + /* + * Binding a new device with existing PASID, need to setup + * the PASID entry. + */ + spin_lock(&iommu->lock); + ret = intel_pasid_setup_first_level(iommu, dev, + mm ? mm->pgd : init_mm.pgd, + svm->pasid, FLPT_DEFAULT_DID, + mm ? 0 : PASID_FLAG_SUPERVISOR_MODE); + spin_unlock(&iommu->lock); + if (ret) { + kfree(sdev); + goto out; + } } list_add_rcu(&sdev->list, &svm->devs); |