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 e6cd288e8b83..0287a6d00192 100644
--- a/include/linux/iommufd.h
+++ b/include/linux/iommufd.h
@@ -15,6 +15,7 @@ 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;
@@ -104,12 +105,21 @@ 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 (*free)(struct iommufd_viommu *viommu);
struct iommu_domain *(*alloc_domain_nested)(
struct iommufd_viommu *viommu,
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)
--
2.43.0