[PATCH v10 3/7] iommu/uapi: Introduce enum type for PASID data format
From: Jacob Pan <hidden>
Date: 2020-09-22 20:16:03
Also in:
linux-iommu, lkml
Subsystem:
the rest · Maintainer:
Linus Torvalds
There can be multiple vendor-specific PASID data formats used in UAPI structures. This patch adds enum type with a last entry which makes range checking much easier. Suggested-by: Alex Williamson <redacted> Reviewed-by: Eric Auger <eric.auger@redhat.com> Signed-off-by: Jacob Pan <redacted> --- include/uapi/linux/iommu.h | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-)
diff --git a/include/uapi/linux/iommu.h b/include/uapi/linux/iommu.h
index b42acc8fe007..7cc6ee6c41f7 100644
--- a/include/uapi/linux/iommu.h
+++ b/include/uapi/linux/iommu.h@@ -298,11 +298,16 @@ struct iommu_gpasid_bind_data_vtd { IOMMU_SVA_VTD_GPASID_PCD | \ IOMMU_SVA_VTD_GPASID_PWT) +enum iommu_pasid_data_format { + IOMMU_PASID_FORMAT_INTEL_VTD = 1, + IOMMU_PASID_FORMAT_LAST, +}; + /** * struct iommu_gpasid_bind_data - Information about device and guest PASID binding * @argsz: User filled size of this data * @version: Version of this data structure - * @format: PASID table entry format + * @format: PASID table entry format of enum iommu_pasid_data_format type * @flags: Additional information on guest bind request * @gpgd: Guest page directory base of the guest mm to bind * @hpasid: Process address space ID used for the guest mm in host IOMMU
@@ -321,7 +326,6 @@ struct iommu_gpasid_bind_data { __u32 argsz; #define IOMMU_GPASID_BIND_VERSION_1 1 __u32 version; -#define IOMMU_PASID_FORMAT_INTEL_VTD 1 __u32 format; __u32 addr_width; #define IOMMU_SVA_GPASID_VAL (1 << 0) /* guest PASID valid */
--
2.7.4