linux-kernel - [RFC v1 8/8] iommu: expose the function iommu_device_use_default

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Message-Id: <20231103171641.1703146-9-lulu@redhat.com>
Date:   Sat,  4 Nov 2023 01:16:41 +0800
From:   Cindy Lu <lulu@...hat.com>
To:     lulu@...hat.com, jasowang@...hat.com, mst@...hat.com,
        yi.l.liu@...el.com, jgg@...dia.com, linux-kernel@...r.kernel.org,
        virtualization@...ts.linux-foundation.org, netdev@...r.kernel.org
Subject: [RFC v1 8/8] iommu: expose the function iommu_device_use_default_domain

Expose the function iommu_device_use_default_domain() and
iommu_device_unuse_default_domain()，
While vdpa bind the iommufd device and detach the iommu device,
vdpa need to call the function
iommu_device_unuse_default_domain() to release the owner

Signed-off-by: Cindy Lu <lulu@...hat.com>
---
 drivers/iommu/iommu.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c
index 3bfc56df4f78..987cbf8c9a87 100644
--- a/drivers/iommu/iommu.c
+++ b/drivers/iommu/iommu.c
@@ -3164,6 +3164,7 @@ int iommu_device_use_default_domain(struct device *dev)
 
 	return ret;
 }
+EXPORT_SYMBOL_GPL(iommu_device_use_default_domain);
 
 /**
  * iommu_device_unuse_default_domain() - Device driver stops handling device
@@ -3187,6 +3188,7 @@ void iommu_device_unuse_default_domain(struct device *dev)
 	mutex_unlock(&group->mutex);
 	iommu_group_put(group);
 }
+EXPORT_SYMBOL_GPL(iommu_device_unuse_default_domain);
 
 static int __iommu_group_alloc_blocking_domain(struct iommu_group *group)
 {
-- 
2.34.3