Both external domain and iommu backend domain can use pinning
interface, thus both can add pfn to dma pfn_list. By moving
the sanity_check_pfn_list to unmap_unpin_all can apply it to
all types of domain.
Fixes: a54eb55045ae ("vfio iommu type1: Add support for mediated devices")
Signed-off-by: Keqian Zhu <zhukeqian1@xxxxxxxxxx>
---
drivers/vfio/vfio_iommu_type1.c | 38 ++++++++++++++++-----------------
1 file changed, 18 insertions(+), 20 deletions(-)
diff --git a/drivers/vfio/vfio_iommu_type1.c b/drivers/vfio/vfio_iommu_type1.c
index 9776a059904d..d796be8bcbc5 100644
--- a/drivers/vfio/vfio_iommu_type1.c
+++ b/drivers/vfio/vfio_iommu_type1.c
@@ -2225,10 +2225,28 @@ static int vfio_iommu_type1_attach_group(void *iommu_data,
return ret;
}
+static void vfio_sanity_check_pfn_list(struct vfio_iommu *iommu)
+{
+ struct rb_node *n;
+
+ n = rb_first(&iommu->dma_list);
+ for (; n; n = rb_next(n)) {
+ struct vfio_dma *dma;
+
+ dma = rb_entry(n, struct vfio_dma, node);
+
+ if (WARN_ON(!RB_EMPTY_ROOT(&dma->pfn_list)))
+ break;
+ }
+ /* mdev vendor driver must unregister notifier */
+ WARN_ON(iommu->notifier.head);
+}
+
static void vfio_iommu_unmap_unpin_all(struct vfio_iommu *iommu)
{
struct rb_node *node;
+ vfio_sanity_check_pfn_list(iommu);
while ((node = rb_first(&iommu->dma_list)))
vfio_remove_dma(iommu, rb_entry(node, struct vfio_dma, node));
}
@@ -2256,23 +2274,6 @@ static void vfio_iommu_unmap_unpin_reaccount(struct vfio_iommu *iommu)
}
}
-static void vfio_sanity_check_pfn_list(struct vfio_iommu *iommu)
-{
- struct rb_node *n;
-
- n = rb_first(&iommu->dma_list);
- for (; n; n = rb_next(n)) {
- struct vfio_dma *dma;
-
- dma = rb_entry(n, struct vfio_dma, node);
-
- if (WARN_ON(!RB_EMPTY_ROOT(&dma->pfn_list)))
- break;
- }
- /* mdev vendor driver must unregister notifier */
- WARN_ON(iommu->notifier.head);
-}
-
/*
* Called when a domain is removed in detach. It is possible that
* the removed domain decided the iova aperture window. Modify the
@@ -2371,8 +2372,6 @@ static void vfio_iommu_type1_detach_group(void *iommu_data,
kfree(group);
if (list_empty(&iommu->external_domain->group_list)) {
- vfio_sanity_check_pfn_list(iommu);
-
/*
* During dirty page tracking, we can't remove
* vfio_dma because dirty log will lose.
@@ -2503,7 +2502,6 @@ static void vfio_iommu_type1_release(void *iommu_data)
if (iommu->external_domain) {
vfio_release_domain(iommu->external_domain, true);
- vfio_sanity_check_pfn_list(iommu);
kfree(iommu->external_domain);
}
--
2.19.1
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