[RFC v1 4/8] intel/vt-d: export intel_iommu_get_resv_regions

[Wei Liu <wei.liu@xxxxxxxxxx>]

When Microsoft Hypervisor runs on Intel platforms it needs to know the
reserved regions to program devices correctly. There is no reason to
duplicate intel_iommu_get_resv_regions. Export it.

Signed-off-by: Wei Liu <wei.liu@xxxxxxxxxx>
---
 drivers/iommu/intel/iommu.c | 5 +++--
 include/linux/intel-iommu.h | 4 ++++
 2 files changed, 7 insertions(+), 2 deletions(-)

diff --git a/drivers/iommu/intel/iommu.c b/drivers/iommu/intel/iommu.c
index a4294d310b93..01973bc20080 100644
--- a/drivers/iommu/intel/iommu.c
+++ b/drivers/iommu/intel/iommu.c
@@ -5176,8 +5176,8 @@ static void intel_iommu_probe_finalize(struct device *dev)
 		set_dma_ops(dev, NULL);
 }
 
-static void intel_iommu_get_resv_regions(struct device *device,
-					 struct list_head *head)
+void intel_iommu_get_resv_regions(struct device *device,
+				 struct list_head *head)
 {
 	int prot = DMA_PTE_READ | DMA_PTE_WRITE;
 	struct iommu_resv_region *reg;
@@ -5232,6 +5232,7 @@ static void intel_iommu_get_resv_regions(struct device *device,
 		return;
 	list_add_tail(&reg->list, head);
 }
+EXPORT_SYMBOL_GPL(intel_iommu_get_resv_regions);
 
 int intel_iommu_enable_pasid(struct intel_iommu *iommu, struct device *dev)
 {
diff --git a/include/linux/intel-iommu.h b/include/linux/intel-iommu.h
index 03faf20a6817..f91869f765bc 100644
--- a/include/linux/intel-iommu.h
+++ b/include/linux/intel-iommu.h
@@ -814,6 +814,8 @@ extern int iommu_calculate_max_sagaw(struct intel_iommu *iommu);
 extern int dmar_disabled;
 extern int intel_iommu_enabled;
 extern int intel_iommu_gfx_mapped;
+extern void intel_iommu_get_resv_regions(struct device *device,
+				 struct list_head *head);
 #else
 static inline int iommu_calculate_agaw(struct intel_iommu *iommu)
 {
@@ -825,6 +827,8 @@ static inline int iommu_calculate_max_sagaw(struct intel_iommu *iommu)
 }
 #define dmar_disabled	(1)
 #define intel_iommu_enabled (0)
+static inline void intel_iommu_get_resv_regions(struct device *device,
+				 struct list_head *head) {}
 #endif
 
 #endif
-- 
2.30.2