diff mbox series

[v5,01/11] iommufd: Add data structure for Intel VT-d stage-1 domain allocation

Message ID 20230921075431.125239-2-yi.l.liu@intel.com (mailing list archive)
State New
Headers show
Series Add Intel VT-d nested translation | expand

Commit Message

Yi Liu Sept. 21, 2023, 7:54 a.m. UTC 
This adds IOMMU_HWPT_TYPE_VTD_S1 for stage-1 hw_pagetable of Intel VT-d
and the corressponding data structure for userspace specified parameter
for the domain allocation.

Signed-off-by: Yi Liu <yi.l.liu@intel.com>
---
 include/uapi/linux/iommufd.h | 30 ++++++++++++++++++++++++++++++
 1 file changed, 30 insertions(+)

Comments

Tian, Kevin Sept. 27, 2023, 6:18 a.m. UTC | #1 
> From: Liu, Yi L <yi.l.liu@intel.com>
> Sent: Thursday, September 21, 2023 3:54 PM
> 
> This adds IOMMU_HWPT_TYPE_VTD_S1 for stage-1 hw_pagetable of Intel
> VT-d
> and the corressponding data structure for userspace specified parameter
> for the domain allocation.
> 
> Signed-off-by: Yi Liu <yi.l.liu@intel.com>

Reviewed-by: Kevin Tian <kevin.tian@intel.com>
diff mbox series

Patch

diff --git a/include/uapi/linux/iommufd.h b/include/uapi/linux/iommufd.h
index 2083a0309a9b..18a502e206c3 100644
--- a/include/uapi/linux/iommufd.h
+++ b/include/uapi/linux/iommufd.h
@@ -358,12 +358,42 @@  enum iommufd_hwpt_alloc_flags {
 	IOMMU_HWPT_ALLOC_NEST_PARENT = 1 << 0,
 };
 
+/**
+ * enum iommu_hwpt_vtd_s1_flags - Intel VT-d stage-1 page table
+ *                                entry attributes
+ * @IOMMU_VTD_S1_SRE: Supervisor request
+ * @IOMMU_VTD_S1_EAFE: Extended access enable
+ * @IOMMU_VTD_S1_WPE: Write protect enable
+ */
+enum iommu_hwpt_vtd_s1_flags {
+	IOMMU_VTD_S1_SRE = 1 << 0,
+	IOMMU_VTD_S1_EAFE = 1 << 1,
+	IOMMU_VTD_S1_WPE = 1 << 2,
+};
+
+/**
+ * struct iommu_hwpt_vtd_s1 - Intel VT-d stage-1 page table
+ *                            info (IOMMU_HWPT_TYPE_VTD_S1)
+ * @flags: Combination of enum iommu_hwpt_vtd_s1_flags
+ * @pgtbl_addr: The base address of the stage-1 page table.
+ * @addr_width: The address width of the stage-1 page table
+ * @__reserved: Must be 0
+ */
+struct iommu_hwpt_vtd_s1 {
+	__aligned_u64 flags;
+	__aligned_u64 pgtbl_addr;
+	__u32 addr_width;
+	__u32 __reserved;
+};
+
 /**
  * enum iommu_hwpt_type - IOMMU HWPT Type
  * @IOMMU_HWPT_TYPE_DEFAULT: default
+ * @IOMMU_HWPT_TYPE_VTD_S1: Intel VT-d stage-1 page table
  */
 enum iommu_hwpt_type {
 	IOMMU_HWPT_TYPE_DEFAULT,
+	IOMMU_HWPT_TYPE_VTD_S1,
 };
 
 /**