[RFC v1 4/8] intel/vt-d: export intel_iommu_get_resv_regions
From: Wei Liu <wei.liu@kernel.org>
Date: 2021-07-09 11:43:54
Also in:
linux-iommu, lkml
Subsystem:
intel iommu (vt-d), iommu subsystem, the rest · Maintainers:
David Woodhouse, Lu Baolu, Joerg Roedel, Will Deacon, Linus Torvalds
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@kernel.org> --- 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(®->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