diff options
Diffstat (limited to 'include/uapi/linux')
| -rw-r--r-- | include/uapi/linux/iommufd.h | 20 |
1 files changed, 19 insertions, 1 deletions
diff --git a/include/uapi/linux/iommufd.h b/include/uapi/linux/iommufd.h index 9c8c304b5de2..32ee02380912 100644 --- a/include/uapi/linux/iommufd.h +++ b/include/uapi/linux/iommufd.h @@ -629,6 +629,15 @@ enum iommufd_hw_capabilities { }; /** + * enum iommufd_hw_info_flags - Flags for iommu_hw_info + * @IOMMU_HW_INFO_FLAG_INPUT_TYPE: If set, @in_data_type carries an input type + * for user space to request for a specific info + */ +enum iommufd_hw_info_flags { + IOMMU_HW_INFO_FLAG_INPUT_TYPE = 1 << 0, +}; + +/** * struct iommu_hw_info - ioctl(IOMMU_GET_HW_INFO) * @size: sizeof(struct iommu_hw_info) * @flags: Must be 0 @@ -637,6 +646,12 @@ enum iommufd_hw_capabilities { * data that kernel supports * @data_uptr: User pointer to a user-space buffer used by the kernel to fill * the iommu type specific hardware information data + * @in_data_type: This shares the same field with @out_data_type, making it be + * a bidirectional field. When IOMMU_HW_INFO_FLAG_INPUT_TYPE is + * set, an input type carried via this @in_data_type field will + * be valid, requesting for the info data to the given type. If + * IOMMU_HW_INFO_FLAG_INPUT_TYPE is unset, any input value will + * be seen as IOMMU_HW_INFO_TYPE_DEFAULT * @out_data_type: Output the iommu hardware info type as defined in the enum * iommu_hw_info_type. * @out_capabilities: Output the generic iommu capability info type as defined @@ -666,7 +681,10 @@ struct iommu_hw_info { __u32 dev_id; __u32 data_len; __aligned_u64 data_uptr; - __u32 out_data_type; + union { + __u32 in_data_type; + __u32 out_data_type; + }; __u8 out_max_pasid_log2; __u8 __reserved[3]; __aligned_u64 out_capabilities; |