linux-kernel - [PATCH v2 3/5] mm: Add structure to keep sva information

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Message-Id: <20230827084401.819852-4-tina.zhang@intel.com>
Date:   Sun, 27 Aug 2023 16:43:59 +0800
From:   Tina Zhang <tina.zhang@...el.com>
To:     Jason Gunthorpe <jgg@...pe.ca>, Kevin Tian <kevin.tian@...el.com>,
        Lu Baolu <baolu.lu@...ux.intel.com>,
        Michael Shavit <mshavit@...gle.com>
Cc:     iommu@...ts.linux.dev, linux-kernel@...r.kernel.org,
        Tina Zhang <tina.zhang@...el.com>
Subject: [PATCH v2 3/5] mm: Add structure to keep sva information

Introduce iommu_mm_data structure to keep sva information (pasid and the
related sva domains). Add iommu_mm pointer, pointing to an instance of
iommu_mm_data structure, to mm.

Signed-off-by: Tina Zhang <tina.zhang@...el.com>
---
 include/linux/iommu.h    | 5 +++++
 include/linux/mm_types.h | 2 ++
 2 files changed, 7 insertions(+)

diff --git a/include/linux/iommu.h b/include/linux/iommu.h
index ab8784dfdbd98..937f3abc26f2e 100644
--- a/include/linux/iommu.h
+++ b/include/linux/iommu.h
@@ -670,6 +670,11 @@ struct iommu_sva {
 	struct iommu_domain		*domain;
 };
 
+struct iommu_mm_data {
+	u32			pasid;
+	struct list_head	sva_domains;
+};
+
 int iommu_fwspec_init(struct device *dev, struct fwnode_handle *iommu_fwnode,
 		      const struct iommu_ops *ops);
 void iommu_fwspec_free(struct device *dev);
diff --git a/include/linux/mm_types.h b/include/linux/mm_types.h
index 5e74ce4a28cd6..3fd65b7537f0e 100644
--- a/include/linux/mm_types.h
+++ b/include/linux/mm_types.h
@@ -595,6 +595,7 @@ struct mm_cid {
 #endif
 
 struct kioctx_table;
+struct iommu_mm_data;
 struct mm_struct {
 	struct {
 		/*
@@ -808,6 +809,7 @@ struct mm_struct {
 
 #ifdef CONFIG_IOMMU_SVA
 		u32 pasid;
+		struct iommu_mm_data *iommu_mm;
 #endif
 #ifdef CONFIG_KSM
 		/*
-- 
2.34.1