Commit 69d2689e authored by Nicolin Chen's avatar Nicolin Chen Committed by Jason Gunthorpe
Browse files

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: default avatarJason Gunthorpe <jgg@nvidia.com>
Reviewed-by: default avatarKevin Tian <kevin.tian@intel.com>
Reviewed-by: default avatarJason Gunthorpe <jgg@nvidia.com>
Signed-off-by: default avatarNicolin Chen <nicolinc@nvidia.com>
Signed-off-by: default avatarJason Gunthorpe <jgg@nvidia.com>
parent 4db97c21

include/linux/iommufd.h

+9 −0
Original line number Diff line number Diff line
@@ -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)