@@ -2492,6 +2492,43 @@ static int arm_smmu_of_xlate(struct device *dev, struct of_phandle_args *args)
return iommu_fwspec_add_ids(dev, args->args, 1);
}
+static bool arm_smmu_dev_has_rmr(struct arm_smmu_master *master,
+ struct iommu_rmr *e)
+{
+ int i, j;
+
+ for (i = 0; i < master->num_sids; i++) {
+ for (j = 0; j < e->num_ids; j++) {
+ if (e->ids[j] == master->sids[i])
+ return true;
+ }
+ }
+
+ return false;
+}
+
+static void arm_smmu_rmr_get_resv_regions(struct device *dev,
+ struct list_head *head)
+{
+ struct arm_smmu_master *master = dev_iommu_priv_get(dev);
+ struct arm_smmu_device *smmu = master->smmu;
+ struct iommu_rmr *rmr;
+
+ list_for_each_entry(rmr, &smmu->rmr_list, list) {
+ struct iommu_resv_region *region;
+ int prot = IOMMU_READ | IOMMU_WRITE | IOMMU_NOEXEC | IOMMU_MMIO;
+
+ if (!arm_smmu_dev_has_rmr(master, rmr))
+ continue;
+ region = iommu_alloc_resv_region(rmr->base_address,
+ rmr->length, prot,
+ IOMMU_RESV_DIRECT);
+ if (!region)
+ return;
+
+ list_add_tail(®ion->list, head);
+ }
+}
static void arm_smmu_get_resv_regions(struct device *dev,
struct list_head *head)
{
@@ -2506,6 +2543,7 @@ static void arm_smmu_get_resv_regions(struct device *dev,
list_add_tail(®ion->list, head);
iommu_dma_get_resv_regions(dev, head);
+ arm_smmu_rmr_get_resv_regions(dev, head);
}
static bool arm_smmu_dev_has_feature(struct device *dev,
Get 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.thodi@huawei.com> --- drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c | 38 +++++++++++++++++++++ 1 file changed, 38 insertions(+)