diff options
| -rw-r--r-- | drivers/iommu/arm-smmu.c | 14 |
1 files changed, 9 insertions, 5 deletions
diff --git a/drivers/iommu/arm-smmu.c b/drivers/iommu/arm-smmu.c index 373b6e4d6e1..3ae50be4926 100644 --- a/drivers/iommu/arm-smmu.c +++ b/drivers/iommu/arm-smmu.c @@ -1606,13 +1606,17 @@ static phys_addr_t arm_smmu_iova_to_phys(struct iommu_domain *domain, static int arm_smmu_domain_has_cap(struct iommu_domain *domain, unsigned long cap) { - unsigned long caps = 0; struct arm_smmu_domain *smmu_domain = domain->priv; + u32 features = smmu_domain->root_cfg.smmu->features; - if (smmu_domain->root_cfg.smmu->features & ARM_SMMU_FEAT_COHERENT_WALK) - caps |= IOMMU_CAP_CACHE_COHERENCY; - - return !!(cap & caps); + switch (cap) { + case IOMMU_CAP_CACHE_COHERENCY: + return features & ARM_SMMU_FEAT_COHERENT_WALK; + case IOMMU_CAP_INTR_REMAP: + return 1; /* MSIs are just memory writes */ + default: + return 0; + } } static int __arm_smmu_get_pci_sid(struct pci_dev *pdev, u16 alias, void *data) |