diff options
| author | Nicolin Chen <nicolinc@nvidia.com> | 2024-11-05 12:04:22 -0800 |
|---|---|---|
| committer | Jason Gunthorpe <jgg@nvidia.com> | 2024-11-12 11:46:18 -0400 |
| commit | 69d2689e57f5cb235c0609dd2f8fa10c1a832f87 (patch) | |
| tree | 59dd6070cf25aa53c23f167baea63e5c3be1f43b | |
| parent | 4db97c21ed07a7d4081ed9820599fa36857083d6 (diff) | |
iommufd: Add alloc_domain_nested op to iommufd_viommu_ops
Allow IOMMU driver to use a vIOMMU object that holds a nesting parent
hwpt/domain to allocate a nested domain.
Link: https://patch.msgid.link/r/2dcdb5e405dc0deb68230564530d989d285d959c.1730836219.git.nicolinc@nvidia.com
Suggested-by: Jason Gunthorpe <jgg@nvidia.com>
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Signed-off-by: Nicolin Chen <nicolinc@nvidia.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
| -rw-r--r-- | include/linux/iommufd.h | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/include/linux/iommufd.h b/include/linux/iommufd.h index 4fc2ce332f10..de9b56265c9c 100644 --- a/include/linux/iommufd.h +++ b/include/linux/iommufd.h @@ -14,6 +14,7 @@ struct device; struct file; struct iommu_group; +struct iommu_user_data; struct iommufd_access; struct iommufd_ctx; struct iommufd_device; @@ -95,9 +96,17 @@ struct iommufd_viommu { * struct iommufd_viommu_ops - vIOMMU specific operations * @destroy: Clean up all driver-specific parts of an iommufd_viommu. The memory * of the vIOMMU will be free-ed by iommufd core after calling this op + * @alloc_domain_nested: Allocate a IOMMU_DOMAIN_NESTED on a vIOMMU that holds a + * nesting parent domain (IOMMU_DOMAIN_PAGING). @user_data + * must be defined in include/uapi/linux/iommufd.h. + * It must fully initialize the new iommu_domain before + * returning. Upon failure, ERR_PTR must be returned. */ struct iommufd_viommu_ops { void (*destroy)(struct iommufd_viommu *viommu); + struct iommu_domain *(*alloc_domain_nested)( + struct iommufd_viommu *viommu, u32 flags, + const struct iommu_user_data *user_data); }; #if IS_ENABLED(CONFIG_IOMMUFD) |