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| author |   Will Deacon <will.deacon@arm.com> | 2017-01-06 16:28:17 +0000 |
|---|---|---|
| committer | Will Deacon <will.deacon@arm.com> | 2017-04-06 16:06:43 +0100 |
| commit | 0834cc28fa56c65887c614b6c045be2ba06fdcb0 (patch) | |
| tree | 2b999c010be5d5e05aa805f9d1a79f37e1cc89a3 /drivers/iommu/arm-smmu.c | |
| parent | iommu/arm-smmu: Add global SMR masking property (diff) | |
| download | linux-dev-0834cc28fa56c65887c614b6c045be2ba06fdcb0.tar.xz linux-dev-0834cc28fa56c65887c614b6c045be2ba06fdcb0.zip | |
iommu/arm-smmu: Restrict domain attributes to UNMANAGED domains
The ARM SMMU drivers provide a DOMAIN_ATTR_NESTING domain attribute,
which allows callers of the IOMMU API to request that the page table
for a domain is installed at stage-2, if supported by the hardware.
Since setting this attribute only makes sense for UNMANAGED domains,
this patch returns -ENODEV if the domain_{get,set}_attr operations are
called on other domain types.
Signed-off-by: Will Deacon <will.deacon@arm.com>
Diffstat (limited to 'drivers/iommu/arm-smmu.c')
| -rw-r--r-- | drivers/iommu/arm-smmu.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/iommu/arm-smmu.c b/drivers/iommu/arm-smmu.c index 6560c4a34b96..099215bbff89 100644 --- a/drivers/iommu/arm-smmu.c +++ b/drivers/iommu/arm-smmu.c @@ -1603,6 +1603,9 @@ static int arm_smmu_domain_get_attr(struct iommu_domain *domain, { struct arm_smmu_domain *smmu_domain = to_smmu_domain(domain); + if (domain->type != IOMMU_DOMAIN_UNMANAGED) + return -EINVAL; + switch (attr) { case DOMAIN_ATTR_NESTING: *(int *)data = (smmu_domain->stage == ARM_SMMU_DOMAIN_NESTED); @@ -1618,6 +1621,9 @@ static int arm_smmu_domain_set_attr(struct iommu_domain *domain, int ret = 0; struct arm_smmu_domain *smmu_domain = to_smmu_domain(domain); + if (domain->type != IOMMU_DOMAIN_UNMANAGED) + return -EINVAL; + mutex_lock(&smmu_domain->init_mutex); switch (attr) { |