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iommu/arm-smmu-v3: Check that the RID domain is S1 in SVA

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The SVA code only works if the RID domain is a S1 domain and has already
installed the cdtable.

Originally the check for this was in arm_smmu_sva_bind() but when the op
was removed the test didn't get copied over to the new
arm_smmu_sva_set_dev_pasid().

Without the test wrong usage usually will hit a WARN_ON() in
arm_smmu_write_ctx_desc() due to a missing ctx table.

However, the next patches wil change things so that an IDENTITY domain is
not a struct arm_smmu_domain and this will get into memory corruption if
the struct is wrongly casted.

Fail in arm_smmu_sva_set_dev_pasid() if the STE does not have a S1, which
is a proxy for the STE having a pointer to the CD table. Write it in a way
that will be compatible with the next patches.

Fixes: 386fa64fd5 ("arm-smmu-v3/sva: Add SVA domain support")
Reported-by: Shameerali Kolothum Thodi <shameerali.kolothum.thodi@huawei.com>
Closes: https://lore.kernel.org/linux-iommu/2a828e481416405fb3a4cceb9e075a59@huawei.com/
Tested-by: Nicolin Chen <nicolinc@nvidia.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Link: https://lore.kernel.org/r/11-v6-96275f25c39d+2d4-smmuv3_newapi_p1_jgg@nvidia.com
Signed-off-by: Will Deacon <will@kernel.org>
This commit is contained in:
Jason Gunthorpe 2024-02-26 13:07:22 -04:00 committed by Will Deacon
parent 1b50017d39
commit ae91f6552c
1 changed files with 7 additions and 1 deletions
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8
drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3-sva.c
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@ -364,7 +364,13 @@ static int __arm_smmu_sva_bind(struct device *dev, ioasid_t pasid,
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(domain);
if (smmu_domain->stage != ARM_SMMU_DOMAIN_S1)
return -ENODEV;
if (!master || !master->sva_enabled)
return -ENODEV;