[PATCH v4 01/27] iommu/arm-smmu-v3: Check that the RID domain is S1 in SVA
From: Jason Gunthorpe <jgg@nvidia.com>
Date: 2024-01-26 19:20:12
Also in:
linux-iommu, linux-patches
Subsystem:
arm smmu drivers, arm smmu sva support, iommu subsystem, the rest · Maintainers:
Will Deacon, Joerg Roedel, Linus Torvalds
This code only works if the RID domain is a S1 domain and has already installed the cdtable. Reviewed-by: Nicolin Chen <redacted> Signed-off-by: Jason Gunthorpe <jgg@nvidia.com> --- drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3-sva.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-)
diff --git a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3-sva.c b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3-sva.c
index 05722121f00e70..b4549d698f3569 100644
--- a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3-sva.c
+++ b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3-sva.c@@ -387,7 +387,13 @@ static int __arm_smmu_sva_bind(struct device *dev, struct mm_struct *mm) struct arm_smmu_bond *bond; struct arm_smmu_master *master = dev_iommu_priv_get(dev); struct iommu_domain *domain = iommu_get_domain_for_dev(dev); - struct arm_smmu_domain *smmu_domain = to_smmu_domain(domain); + struct arm_smmu_domain *smmu_domain; + + if (!(domain->type & __IOMMU_DOMAIN_PAGING)) + return -ENODEV; + smmu_domain = to_smmu_domain(iommu_get_domain_for_dev(dev)); + if (smmu_domain->stage != ARM_SMMU_DOMAIN_S1) + return -ENODEV; if (!master || !master->sva_enabled) return -ENODEV;
--
2.43.0
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