2023-09-22 00:24:01

by Yi Liu

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

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 <[email protected]>
---
include/uapi/linux/iommufd.h | 30 ++++++++++++++++++++++++++++++
1 file changed, 30 insertions(+)

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,
};

/**
--
2.34.1

2023-09-27 16:29:45

by Tian, Kevin

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

> From: Liu, Yi L <[email protected]>
> 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 <[email protected]>

Reviewed-by: Kevin Tian <[email protected]>