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From: Wei Liu <wei.liu@kernel.org>
To: Linux on Hyper-V List <linux-hyperv@vger.kernel.org>
Cc: virtualization@lists.linux-foundation.org,
	Linux Kernel List <linux-kernel@vger.kernel.org>,
	Michael Kelley <mikelley@microsoft.com>,
	Vineeth Pillai <viremana@linux.microsoft.com>,
	Sunil Muthuswamy <sunilmut@microsoft.com>,
	Nuno Das Neves <nunodasneves@linux.microsoft.com>,
	kumarpraveen@linux.microsoft.com, pasha.tatashin@soleen.com,
	Wei Liu <wei.liu@kernel.org>,
	David Woodhouse <dwmw2@infradead.org>,
	Lu Baolu <baolu.lu@linux.intel.com>,
	Joerg Roedel <joro@8bytes.org>, Will Deacon <will@kernel.org>,
	iommu@lists.linux-foundation.org (open list:INTEL IOMMU (VT-d))
Subject: [RFC v1 4/8] intel/vt-d: export intel_iommu_get_resv_regions
Date: Fri,  9 Jul 2021 11:43:35 +0000	[thread overview]
Message-ID: <20210709114339.3467637-5-wei.liu@kernel.org> (raw)
In-Reply-To: <20210709114339.3467637-1-wei.liu@kernel.org>

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(&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


  parent reply	other threads:[~2021-07-09 11:43 UTC|newest]

Thread overview: 35+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-07-09 11:43 [RFC v1 0/8] MSHV: add PV-IOMMU driver Wei Liu
2021-07-09 11:43 ` [RFC v1 1/8] x86/hyperv: export hv_build_pci_dev_id Wei Liu
2021-07-09 11:43 ` [RFC v1 2/8] asm-generic/hyperv: add device domain definitions Wei Liu
2021-07-09 11:43 ` [RFC v1 3/8] intel/vt-d: make DMAR table parsing code more flexible Wei Liu
2021-07-09 12:56   ` Robin Murphy
2021-07-09 13:42     ` Wei Liu
2021-07-09 11:43 ` Wei Liu [this message]
2021-07-09 14:17   ` [RFC v1 4/8] intel/vt-d: export intel_iommu_get_resv_regions Lu Baolu
2021-07-09 14:21     ` Wei Liu
2021-07-09 11:43 ` [RFC v1 5/8] mshv: add paravirtualized IOMMU support Wei Liu
2021-08-03 18:40   ` Praveen Kumar
2021-08-03 21:47     ` Wei Liu
2021-08-04  6:43       ` Praveen Kumar
2021-08-10 10:46         ` Wei Liu
2021-07-09 11:43 ` [RFC v1 6/8] mshv: command line option to skip devices in PV-IOMMU Wei Liu
2021-07-09 12:46   ` Robin Murphy
2021-07-09 13:34     ` Wei Liu
2021-08-03 18:50   ` Praveen Kumar
2021-08-03 21:56     ` Wei Liu
2021-08-04  7:03       ` Praveen Kumar
2021-08-10 10:04         ` Wei Liu
2021-07-09 11:43 ` [RFC v1 7/8] mshv: implement in-kernel device framework Wei Liu
2021-07-09 13:02   ` Matthew Wilcox
2021-07-09 13:50     ` Wei Liu
2021-07-09 15:32       ` Matthew Wilcox
2021-07-09 16:27         ` Wei Liu
2021-07-09 16:38           ` Matthew Wilcox
2021-07-09 19:14             ` Wei Liu
2021-07-09 19:48               ` Matthew Wilcox
2021-07-09 20:11                 ` Wei Liu
2021-08-03 19:12   ` Praveen Kumar
2021-08-03 22:04     ` Wei Liu
2021-07-09 11:43 ` [RFC v1 8/8] mshv: add vfio bridge device Wei Liu
2021-08-03 19:27   ` Praveen Kumar
2021-08-10 10:52     ` Wei Liu

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