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From: Jacob Pan <jacob.pan.linux@gmail.com>
To: iommu@lists.linux-foundation.org,
	LKML <linux-kernel@vger.kernel.org>,
	Joerg Roedel <joro@8bytes.org>,
	Alex Williamson <alex.williamson@redhat.com>,
	"Lu Baolu" <baolu.lu@linux.intel.com>,
	David Woodhouse <dwmw2@infradead.org>,
	Jonathan Corbet <corbet@lwn.net>
Cc: "Tian, Kevin" <kevin.tian@intel.com>,
	Raj Ashok <ashok.raj@intel.com>, Yi Sun <yi.y.sun@intel.com>,
	Jean-Philippe Brucker <jean-philippe@linaro.com>,
	Wu Hao <hao.wu@intel.com>
Subject: [PATCH v9 3/7] iommu/uapi: Introduce enum type for PASID data format
Date: Fri, 11 Sep 2020 14:57:52 -0700	[thread overview]
Message-ID: <1599861476-53416-4-git-send-email-jacob.jun.pan@linux.intel.com> (raw)
In-Reply-To: <1599861476-53416-1-git-send-email-jacob.jun.pan@linux.intel.com>

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 <alex.williamson@redhat.com>
Reviewed-by: Eric Auger <eric.auger@redhat.com>
Signed-off-by: Jacob Pan <jacob.jun.pan@linux.intel.com>
---
 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

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  parent reply	other threads:[~2020-09-11 21:56 UTC|newest]

Thread overview: 17+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-09-11 21:57 [PATCH v9 0/7] IOMMU user API enhancement Jacob Pan
2020-09-11 21:57 ` [PATCH v9 1/7] docs: IOMMU user API Jacob Pan
2020-09-16 18:26   ` Randy Dunlap
2020-09-18 19:44     ` Jacob Pan
2020-09-11 21:57 ` [PATCH v9 2/7] iommu/uapi: Add argsz for user filled data Jacob Pan
2020-09-11 21:57 ` Jacob Pan [this message]
2020-09-18  9:44   ` [PATCH v9 3/7] iommu/uapi: Introduce enum type for PASID data format Joerg Roedel
2020-09-18 17:11     ` Jacob Pan
2020-09-22 20:24       ` Jacob Pan
2020-09-24  8:40       ` Joerg Roedel
2020-09-24 18:31         ` Jacob Pan
2020-09-11 21:57 ` [PATCH v9 4/7] iommu/uapi: Use named union for user data Jacob Pan
2020-09-11 21:57 ` [PATCH v9 5/7] iommu/uapi: Rename uapi functions Jacob Pan
2020-09-11 21:57 ` [PATCH v9 6/7] iommu/uapi: Handle data and argsz filled by users Jacob Pan
2020-09-11 21:57 ` [PATCH v9 7/7] iommu/vt-d: Check UAPI data processed by IOMMU core Jacob Pan
2020-09-18 10:02 ` [PATCH v9 0/7] IOMMU user API enhancement Joerg Roedel
2020-09-18 17:26   ` Jacob Pan

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