linux-kernel - [PATCH v2 07/15] iommu/uapi: Add iommu_gpasid_unbind

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Message-Id: <1591877734-66527-8-git-send-email-yi.l.liu@intel.com>
Date:   Thu, 11 Jun 2020 05:15:26 -0700
From:   Liu Yi L <yi.l.liu@...el.com>
To:     alex.williamson@...hat.com, eric.auger@...hat.com,
        baolu.lu@...ux.intel.com, joro@...tes.org
Cc:     kevin.tian@...el.com, jacob.jun.pan@...ux.intel.com,
        ashok.raj@...el.com, yi.l.liu@...el.com, jun.j.tian@...el.com,
        yi.y.sun@...el.com, jean-philippe@...aro.org, peterx@...hat.com,
        hao.wu@...el.com, iommu@...ts.linux-foundation.org,
        kvm@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH v2 07/15] iommu/uapi: Add iommu_gpasid_unbind_data

Existing iommu_gpasid_bind_data is used for binding guest page tables
to a specified PASID. While for unwind it, a unbind_data structure is
needed.

Cc: Kevin Tian <kevin.tian@...el.com>
CC: Jacob Pan <jacob.jun.pan@...ux.intel.com>
Cc: Alex Williamson <alex.williamson@...hat.com>
Cc: Eric Auger <eric.auger@...hat.com>
Cc: Jean-Philippe Brucker <jean-philippe@...aro.org>
Cc: Joerg Roedel <joro@...tes.org>
Cc: Lu Baolu <baolu.lu@...ux.intel.com>
Signed-off-by: Liu Yi L <yi.l.liu@...el.com>
Signed-off-by: Jacob Pan <jacob.jun.pan@...ux.intel.com>
---
 include/uapi/linux/iommu.h | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/include/uapi/linux/iommu.h b/include/uapi/linux/iommu.h
index 02eac73..46a7c57 100644
--- a/include/uapi/linux/iommu.h
+++ b/include/uapi/linux/iommu.h
@@ -332,6 +332,19 @@ struct iommu_gpasid_bind_data {
 	};
 };
 
+/**
+ * struct iommu_gpasid_unbind_data - Information about device and guest PASID
+ *				     unbinding
+ * @argsz:	User filled size of this data
+ * @flags:	Additional information on guest unbind request
+ * @pasid:	Process address space ID used for the guest mm in host IOMMU
+ */
+struct iommu_gpasid_unbind_data {
+	__u32 argsz;
+	__u64 flags;
+	__u64 pasid;
+};
+
 struct iommu_nesting_info {
 	__u32	size;
 	__u32	format;
-- 
2.7.4