[RFC PATCH 07/12] iommufd: Add RISC-V IOMMU hardware info type

[Gong Shuai]

From: Wu Fei <wu.fei9 at sanechips.com.cn>

Add IOMMU_HW_INFO_TYPE_RISCV and struct iommu_hw_info_riscv, which
reports the RISC-V IOMMU Capabilities register through
IOMMU_GET_HW_INFO.

Signed-off-by: Wu Fei <wu.fei9 at sanechips.com.cn>
Signed-off-by: Gong Shuai <gong.shuai at sanechips.com.cn>
---
 include/uapi/linux/iommufd.h | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/include/uapi/linux/iommufd.h b/include/uapi/linux/iommufd.h
index 36e6187bb34b..acfef0338cd1 100644
--- a/include/uapi/linux/iommufd.h
+++ b/include/uapi/linux/iommufd.h
@@ -716,6 +716,14 @@ struct iommu_hw_info_amd {
 	__aligned_u64 efr2;
 };
 
+/**
+ * struct iommu_hw_info_riscv - RISC-V IOMMU device info
+ * @capabilities: Value of RISC-V IOMMU Capabilities register
+ */
+struct iommu_hw_info_riscv {
+	__u64 capabilities;
+};
+
 /**
  * enum iommu_hw_info_type - IOMMU Hardware Info Types
  * @IOMMU_HW_INFO_TYPE_NONE: Output by the drivers that do not report hardware
@@ -726,6 +734,7 @@ struct iommu_hw_info_amd {
  * @IOMMU_HW_INFO_TYPE_TEGRA241_CMDQV: NVIDIA Tegra241 CMDQV (extension for ARM
  *                                     SMMUv3) info type
  * @IOMMU_HW_INFO_TYPE_AMD: AMD IOMMU info type
+ * @IOMMU_HW_INFO_TYPE_RISCV: RISC-V IOMMU info type
  */
 enum iommu_hw_info_type {
 	IOMMU_HW_INFO_TYPE_NONE = 0,
@@ -734,6 +743,7 @@ enum iommu_hw_info_type {
 	IOMMU_HW_INFO_TYPE_ARM_SMMUV3 = 2,
 	IOMMU_HW_INFO_TYPE_TEGRA241_CMDQV = 3,
 	IOMMU_HW_INFO_TYPE_AMD = 4,
+	IOMMU_HW_INFO_TYPE_RISCV = 5,
 };
 
 /**
-- 
2.53.0