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[134.134.137.73]) by smtp.gmail.com with ESMTPSA id y128sm8672547pfy.74.2020.08.31.11.18.11 (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Mon, 31 Aug 2020 11:18:13 -0700 (PDT) From: Jacob Pan X-Google-Original-From: Jacob Pan To: iommu@lists.linux-foundation.org, LKML , Joerg Roedel , Alex Williamson Cc: "Lu Baolu" , David Woodhouse , Yi Liu , "Tian, Kevin" , Raj Ashok , "Christoph Hellwig" , Jean-Philippe Brucker , Eric Auger , Jonathan Corbet , Jacob Pan Subject: [PATCH v8 3/7] iommu/uapi: Introduce enum type for PASID data format Date: Mon, 31 Aug 2020 11:24:56 -0700 Message-Id: <1598898300-65475-4-git-send-email-jacob.jun.pan@linux.intel.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1598898300-65475-1-git-send-email-jacob.jun.pan@linux.intel.com> References: <1598898300-65475-1-git-send-email-jacob.jun.pan@linux.intel.com> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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 Reviewed-by: Eric Auger Signed-off-by: Jacob Pan --- 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