Allow an IOMMU driver to convert a core-managed viommu to a nested parent domain for the info that the domain holds.
Signed-off-by: Nicolin Chen nicolinc@nvidia.com --- drivers/iommu/iommufd/viommu.c | 8 ++++++++ include/linux/iommufd.h | 8 ++++++++ 2 files changed, 16 insertions(+)
diff --git a/drivers/iommu/iommufd/viommu.c b/drivers/iommu/iommufd/viommu.c index 2304f199b033..39a7c04c4132 100644 --- a/drivers/iommu/iommufd/viommu.c +++ b/drivers/iommu/iommufd/viommu.c @@ -239,3 +239,11 @@ int iommufd_viommu_invalidate(struct iommufd_ucmd *ucmd) return -EFAULT; return rc; } + +struct iommu_domain * +iommufd_viommu_to_parent_domain(struct iommufd_viommu *viommu) +{ + if (!viommu || !viommu->hwpt) + return NULL; + return viommu->hwpt->common.domain; +} diff --git a/include/linux/iommufd.h b/include/linux/iommufd.h index e0d7a53acbd5..c0ce12cb1374 100644 --- a/include/linux/iommufd.h +++ b/include/linux/iommufd.h @@ -91,6 +91,8 @@ int iommufd_vfio_compat_ioas_create(struct iommufd_ctx *ictx); int iommufd_vfio_compat_set_no_iommu(struct iommufd_ctx *ictx); struct device * iommufd_viommu_find_device(struct iommufd_viommu *viommu, u64 id); +struct iommu_domain * +iommufd_viommu_to_parent_domain(struct iommufd_viommu *viommu); #else /* !CONFIG_IOMMUFD */ static inline struct iommufd_ctx *iommufd_ctx_from_file(struct file *file) { @@ -137,5 +139,11 @@ iommufd_viommu_find_device(struct iommufd_viommu *viommu, u64 id) { return NULL; } + +static inline struct iommu_domain * +iommufd_viommu_to_parent_domain(struct iommufd_viommu *viommu) +{ + return NULL; +} #endif /* CONFIG_IOMMUFD */ #endif