Commit 67db79dc authored by Nicolin Chen's avatar Nicolin Chen Committed by Jason Gunthorpe
Browse files

iommu/viommu: Add cache_invalidate to iommufd_viommu_ops 

This per-vIOMMU cache_invalidate op is like the cache_invalidate_user op
in struct iommu_domain_ops, but wider, supporting device cache (e.g. PCI
ATC invaldiations).

Link: https://patch.msgid.link/r/90138505850fa6b165135e78a87b4cc7022869a4.1730836308.git.nicolinc@nvidia.com


Reviewed-by: default avatarJason Gunthorpe <jgg@nvidia.com>
Reviewed-by: default avatarKevin Tian <kevin.tian@intel.com>
Signed-off-by: default avatarNicolin Chen <nicolinc@nvidia.com>
Signed-off-by: default avatarJason Gunthorpe <jgg@nvidia.com>
parent 5778c757

include/linux/iommufd.h

+10 −0
Original line number Diff line number Diff line
@@ -16,6 +16,7 @@ struct device; 
struct file;

struct iommu_group;

struct iommu_user_data;

struct iommu_user_data_array;

struct iommufd_access;

struct iommufd_ctx;

struct iommufd_device;
@@ -105,12 +106,21 @@ struct iommufd_viommu { 
 *                       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.

 * @cache_invalidate: Flush hardware cache used by a vIOMMU. It can be used for

 *                    any IOMMU hardware specific cache: TLB and device cache.

 *                    The @array passes in the cache invalidation requests, in

 *                    form of a driver data structure. A driver must update the

 *                    array->entry_num to report the number of handled requests.

 *                    The data structure of the array entry must be defined in

 *                    include/uapi/linux/iommufd.h

 */

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);

	int (*cache_invalidate)(struct iommufd_viommu *viommu,

				struct iommu_user_data_array *array);

};



#if IS_ENABLED(CONFIG_IOMMUFD)