diff mbox series

[08/17] iommu: expose iommu_sva_find() to common header

Message ID 20230103163505.1569356-9-fenghua.yu@intel.com (mailing list archive)
State Changes Requested
Headers show
Series Enable DSA 2.0 Event Log and completion record faulting features | expand

Commit Message

Fenghua Yu Jan. 3, 2023, 4:34 p.m. UTC 
From: Dave Jiang <dave.jiang@intel.com>

Move iommu_sva_find() prototype to global header from local header in order
to allow drivers to call the function. Used by idxd driver to find the mm
from device reported PASID. The symbol is already exported.

Tested-by: Tony Zhu <tony.zhu@intel.com>
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Co-developed-by: Fenghua Yu <fenghua.yu@intel.com>
Signed-off-by: Fenghua Yu <fenghua.yu@intel.com>
Cc: Joerg Roedel <joro@8bytes.org>
Cc: Will Deacon <will@kernel.org>
Cc: Robin Murphy <robin.murphy@arm.com>
Cc: iommu@lists.linux.dev
---
 drivers/iommu/iommu-sva.h | 1 -
 include/linux/iommu.h     | 7 +++++++
 2 files changed, 7 insertions(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/drivers/iommu/iommu-sva.h b/drivers/iommu/iommu-sva.h
index 7215a761b962..102eae1817a2 100644
--- a/drivers/iommu/iommu-sva.h
+++ b/drivers/iommu/iommu-sva.h
@@ -9,7 +9,6 @@ 
 #include <linux/mm_types.h>
 
 int iommu_sva_alloc_pasid(struct mm_struct *mm, ioasid_t min, ioasid_t max);
-struct mm_struct *iommu_sva_find(ioasid_t pasid);
 
 /* I/O Page fault */
 struct device;
diff --git a/include/linux/iommu.h b/include/linux/iommu.h
index 46e1347bfa22..7db16ca3f519 100644
--- a/include/linux/iommu.h
+++ b/include/linux/iommu.h
@@ -704,6 +704,8 @@  void iommu_release_device(struct device *dev);
 int iommu_dev_enable_feature(struct device *dev, enum iommu_dev_features f);
 int iommu_dev_disable_feature(struct device *dev, enum iommu_dev_features f);
 
+struct mm_struct *iommu_sva_find(ioasid_t pasid);
+
 int iommu_device_use_default_domain(struct device *dev);
 void iommu_device_unuse_default_domain(struct device *dev);
 
@@ -1042,6 +1044,11 @@  iommu_dev_disable_feature(struct device *dev, enum iommu_dev_features feat)
 	return -ENODEV;
 }
 
+static inline struct mm_struct *iommu_sva_find(ioasid_t pasid)
+{
+	return ERR_PTR(-ENODEV);
+}
+
 static inline struct iommu_fwspec *dev_iommu_fwspec_get(struct device *dev)
 {
 	return NULL;