[PATCH v8 11/11] iommu/arm-smmu: Reserve any RMR regions associated with a dev

[Shameer Kolothum via iommu]

Get ACPI IORT RMR regions associated with a dev reserved
so that there is a unity mapping for them in SMMU.

Signed-off-by: Shameer Kolothum <shameerali.kolothum.th...@huawei.com>
---
 drivers/iommu/arm/arm-smmu/arm-smmu.c | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/drivers/iommu/arm/arm-smmu/arm-smmu.c 
b/drivers/iommu/arm/arm-smmu/arm-smmu.c
index 19dcae41d1aa..55b9d8e525d3 100644
--- a/drivers/iommu/arm/arm-smmu/arm-smmu.c
+++ b/drivers/iommu/arm/arm-smmu/arm-smmu.c
@@ -1558,6 +1558,7 @@ static void arm_smmu_get_resv_regions(struct device *dev,
 {
        struct iommu_resv_region *region;
        int prot = IOMMU_WRITE | IOMMU_NOEXEC | IOMMU_MMIO;
+       struct iommu_fwspec *fwspec = dev_iommu_fwspec_get(dev);
 
        region = iommu_alloc_resv_region(MSI_IOVA_BASE, MSI_IOVA_LENGTH,
                                         prot, IOMMU_RESV_SW_MSI);
@@ -1567,6 +1568,16 @@ static void arm_smmu_get_resv_regions(struct device *dev,
        list_add_tail(&region->list, head);
 
        iommu_dma_get_resv_regions(dev, head);
+       iommu_dma_get_rmrs(fwspec->iommu_fwnode, dev, head);
+}
+
+static void arm_smmu_put_resv_regions(struct device *dev,
+                                     struct list_head *head)
+{
+       struct iommu_fwspec *fwspec = dev_iommu_fwspec_get(dev);
+
+       iommu_dma_put_rmrs(fwspec->iommu_fwnode, head);
+       generic_iommu_put_resv_regions(dev, head);
 }
 
 static int arm_smmu_def_domain_type(struct device *dev)
@@ -1598,7 +1609,7 @@ static struct iommu_ops arm_smmu_ops = {
        .set_pgtable_quirks     = arm_smmu_set_pgtable_quirks,
        .of_xlate               = arm_smmu_of_xlate,
        .get_resv_regions       = arm_smmu_get_resv_regions,
-       .put_resv_regions       = generic_iommu_put_resv_regions,
+       .put_resv_regions       = arm_smmu_put_resv_regions,
        .def_domain_type        = arm_smmu_def_domain_type,
        .pgsize_bitmap          = -1UL, /* Restricted during device attach */
        .owner                  = THIS_MODULE,
-- 
2.25.1

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