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iommu/arm-smmu: Add support for pagetable config domain attribute

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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.ranjan@codeaurora.org>
Link: https://lore.kernel.org/r/2ab52ced2f853115c32461259a075a2877feffa6.1606287059.git.saiprakash.ranjan@codeaurora.org
Signed-off-by: Will Deacon <will@kernel.org>
This commit is contained in:
Sai Prakash Ranjan 2020-11-25 12:30:12 +05:30 committed by Will Deacon
parent 9c00c6400f
commit c99110a865
2 changed files with 21 additions and 0 deletions
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20
drivers/iommu/arm/arm-smmu/arm-smmu.c
View File

@ -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;
}

1
drivers/iommu/arm/arm-smmu/arm-smmu.h
View File

@ -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;