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[v6,18/20] iommu/arm-smmu: Set domain geometry

Message ID c2c7b81e4b7965e0c4e289d54ba930cd28a1ab48.1473173789.git.robin.murphy@arm.com (mailing list archive)
State New, archived
Headers show

Commit Message

Robin Murphy Sept. 6, 2016, 3:33 p.m. UTC 
For non-aperture-based IOMMUs, the domain geometry seems to have become
the de-facto way of indicating the input address space size. That is
quite a useful thing from the users' perspective, so let's do the same.

Reviewed-by: Eric Auger <eric.auger@redhat.com>
Tested-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Signed-off-by: Robin Murphy <robin.murphy@arm.com>
---
 drivers/iommu/arm-smmu-v3.c | 2 ++
 drivers/iommu/arm-smmu.c    | 2 ++
 2 files changed, 4 insertions(+)
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Patch

diff --git a/drivers/iommu/arm-smmu-v3.c b/drivers/iommu/arm-smmu-v3.c
index 1f350a50b35d..be293b5aa896 100644
--- a/drivers/iommu/arm-smmu-v3.c
+++ b/drivers/iommu/arm-smmu-v3.c
@@ -1546,6 +1546,8 @@  static int arm_smmu_domain_finalise(struct iommu_domain *domain)
 		return -ENOMEM;
 
 	domain->pgsize_bitmap = pgtbl_cfg.pgsize_bitmap;
+	domain->geometry.aperture_end = (1UL << ias) - 1;
+	domain->geometry.force_aperture = true;
 	smmu_domain->pgtbl_ops = pgtbl_ops;
 
 	ret = finalise_stage_fn(smmu_domain, &pgtbl_cfg);
diff --git a/drivers/iommu/arm-smmu.c b/drivers/iommu/arm-smmu.c
index aaf7d92448a3..2e20cdc362e0 100644
--- a/drivers/iommu/arm-smmu.c
+++ b/drivers/iommu/arm-smmu.c
@@ -938,6 +938,8 @@  static int arm_smmu_init_domain_context(struct iommu_domain *domain,
 
 	/* Update the domain's page sizes to reflect the page table format */
 	domain->pgsize_bitmap = pgtbl_cfg.pgsize_bitmap;
+	domain->geometry.aperture_end = (1UL << ias) - 1;
+	domain->geometry.force_aperture = true;
 
 	/* Initialise the context bank with our page table cfg */
 	arm_smmu_init_context_bank(smmu_domain, &pgtbl_cfg);