Add support for domain attribute DOMAIN_ATTR_IO_PGTABLE_CFG
to get/set pagetable configuration data which initially will
be used to set quirks and later can be extended to include
other pagetable configuration data.
Signed-off-by: Sai Prakash Ranjan <saiprakash.ran...@codeaurora.org>
---
drivers/iommu/arm/arm-smmu/arm-smmu.c | 20 ++++++++++++++++++++
drivers/iommu/arm/arm-smmu/arm-smmu.h | 1 +
2 files changed, 21 insertions(+)
diff --git a/drivers/iommu/arm/arm-smmu/arm-smmu.c
b/drivers/iommu/arm/arm-smmu/arm-smmu.c
index 0f28a8614da3..4b9b10fe50ed 100644
--- a/drivers/iommu/arm/arm-smmu/arm-smmu.c
+++ b/drivers/iommu/arm/arm-smmu/arm-smmu.c
@@ -789,6 +789,9 @@ static int arm_smmu_init_domain_context(struct iommu_domain
*domain,
if (smmu_domain->non_strict)
pgtbl_cfg.quirks |= IO_PGTABLE_QUIRK_NON_STRICT;
+ if (smmu_domain->pgtbl_cfg.quirks)
+ pgtbl_cfg.quirks |= smmu_domain->pgtbl_cfg.quirks;
+
pgtbl_ops = alloc_io_pgtable_ops(fmt, &pgtbl_cfg, smmu_domain);
if (!pgtbl_ops) {
ret = -ENOMEM;
@@ -1511,6 +1514,12 @@ static int arm_smmu_domain_get_attr(struct iommu_domain
*domain,
case DOMAIN_ATTR_NESTING:
*(int *)data = (smmu_domain->stage ==
ARM_SMMU_DOMAIN_NESTED);
return 0;
+ case DOMAIN_ATTR_IO_PGTABLE_CFG: {
+ struct io_pgtable_domain_attr *pgtbl_cfg = data;
+ *pgtbl_cfg = smmu_domain->pgtbl_cfg;
+
+ return 0;
+ }
default:
return -ENODEV;
}
@@ -1551,6 +1560,17 @@ static int arm_smmu_domain_set_attr(struct iommu_domain
*domain,
else
smmu_domain->stage = ARM_SMMU_DOMAIN_S1;
break;
+ case DOMAIN_ATTR_IO_PGTABLE_CFG: {
+ struct io_pgtable_domain_attr *pgtbl_cfg = data;
+
+ if (smmu_domain->smmu) {
+ ret = -EPERM;
+ goto out_unlock;
+ }
+
+ smmu_domain->pgtbl_cfg = *pgtbl_cfg;
+ break;
+ }
default:
ret = -ENODEV;
}
diff --git a/drivers/iommu/arm/arm-smmu/arm-smmu.h
b/drivers/iommu/arm/arm-smmu/arm-smmu.h
index 04288b6fc619..bb5a419f240f 100644
--- a/drivers/iommu/arm/arm-smmu/arm-smmu.h
+++ b/drivers/iommu/arm/arm-smmu/arm-smmu.h
@@ -364,6 +364,7 @@ enum arm_smmu_domain_stage {
struct arm_smmu_domain {
struct arm_smmu_device *smmu;
struct io_pgtable_ops *pgtbl_ops;
+ struct io_pgtable_domain_attr pgtbl_cfg;
const struct iommu_flush_ops *flush_ops;
struct arm_smmu_cfg cfg;
enum arm_smmu_domain_stage stage;
--
QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member
of Code Aurora Forum, hosted by The Linux Foundation
