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| author | Baoquan He <bhe@redhat.com> | 2017-08-09 16:33:40 +0800 |
|---|---|---|
| committer | Joerg Roedel <jroedel@suse.de> | 2017-08-15 18:14:39 +0200 |
| commit | e01d1913b0d0817191418381a6fcebaa01abde2a (patch) | |
| tree | 462e79ba6c2b8b9c590e392b8f4fbb508f52dc4b | |
| parent | 53019a9e88cc14bae2780ba807faba87a5829891 (diff) | |
| download | op-kernel-dev-e01d1913b0d0817191418381a6fcebaa01abde2a.zip op-kernel-dev-e01d1913b0d0817191418381a6fcebaa01abde2a.tar.gz | |
iommu: Add is_attach_deferred call-back to iommu-ops
This new call-back will be used to check if the domain attach need be
deferred for now. If yes, the domain attach/detach will return directly.
Signed-off-by: Baoquan He <bhe@redhat.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
| -rw-r--r-- | drivers/iommu/iommu.c | 8 | ||||
| -rw-r--r-- | include/linux/iommu.h | 1 |
2 files changed, 9 insertions, 0 deletions
diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c index 3f6ea16..86581b1 100644 --- a/drivers/iommu/iommu.c +++ b/drivers/iommu/iommu.c @@ -1283,6 +1283,10 @@ static int __iommu_attach_device(struct iommu_domain *domain, struct device *dev) { int ret; + if ((domain->ops->is_attach_deferred != NULL) && + domain->ops->is_attach_deferred(domain, dev)) + return 0; + if (unlikely(domain->ops->attach_dev == NULL)) return -ENODEV; @@ -1324,6 +1328,10 @@ EXPORT_SYMBOL_GPL(iommu_attach_device); static void __iommu_detach_device(struct iommu_domain *domain, struct device *dev) { + if ((domain->ops->is_attach_deferred != NULL) && + domain->ops->is_attach_deferred(domain, dev)) + return; + if (unlikely(domain->ops->detach_dev == NULL)) return; diff --git a/include/linux/iommu.h b/include/linux/iommu.h index 2cb54ad..63983c9 100644 --- a/include/linux/iommu.h +++ b/include/linux/iommu.h @@ -225,6 +225,7 @@ struct iommu_ops { u32 (*domain_get_windows)(struct iommu_domain *domain); int (*of_xlate)(struct device *dev, struct of_phandle_args *args); + bool (*is_attach_deferred)(struct iommu_domain *domain, struct device *dev); unsigned long pgsize_bitmap; }; |
