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).
Reviewed-by: Jason Gunthorpe jgg@nvidia.com Signed-off-by: Nicolin Chen nicolinc@nvidia.com --- include/linux/iommufd.h | 10 ++++++++++ 1 file changed, 10 insertions(+)
diff --git a/include/linux/iommufd.h b/include/linux/iommufd.h index 5a630952150d..e58b3e43aa7b 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_array; struct iommufd_access; struct iommufd_ctx; struct iommufd_device; @@ -95,12 +96,21 @@ struct iommufd_vdevice { * @vdevice_free: Free a driver-managed iommufd_vdevice to de-init its structure * or HW procedure. The memory of the vdevice will be free-ed by * iommufd core. + * @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 (*free)(struct iommufd_viommu *viommu); struct iommufd_vdevice *(*vdevice_alloc)(struct iommufd_viommu *viommu, struct device *dev, u64 id); void (*vdevice_free)(struct iommufd_vdevice *vdev); + int (*cache_invalidate)(struct iommufd_viommu *viommu, + struct iommu_user_data_array *array); };
#if IS_ENABLED(CONFIG_IOMMUFD)