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iommufd: Add alloc_domain_nested op to iommufd_viommu_ops

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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>
This commit is contained in:
Nicolin Chen
2024-11-05 12:04:22 -08:00
committed by Jason Gunthorpe
parent 4db97c21ed
commit 69d2689e57
1 changed files with 9 additions and 0 deletions
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9
include/linux/iommufd.h
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@@ -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)