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iommu/arm-smmu-v3: Do not allow a SVA domain to be set on the wrong PASID

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[ Upstream commit fdc69d39e7 ]

The SVA code is wired to assume that the SVA is programmed onto the
mm->pasid. The current core code always does this, so it is fine.

Add a check for clarity.

Tested-by: Nicolin Chen <nicolinc@nvidia.com>
Tested-by: Shameer Kolothum <shameerali.kolothum.thodi@huawei.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Link: https://lore.kernel.org/r/3-v6-228e7adf25eb+4155-smmuv3_newapi_p2_jgg@nvidia.com
Signed-off-by: Will Deacon <will@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Jason Gunthorpe
2024-03-27 15:07:49 -03:00
committed by Greg Kroah-Hartman
parent 42b91ce9b1
commit 086f9188d6
1 changed files with 3 additions and 0 deletions
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drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3-sva.c
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@@ -569,6 +569,9 @@ static int arm_smmu_sva_set_dev_pasid(struct iommu_domain *domain,
int ret = 0;
struct mm_struct *mm = domain->mm;
if (mm_get_enqcmd_pasid(mm) != id)
return -EINVAL;
mutex_lock(&sva_lock);
ret = __arm_smmu_sva_bind(dev, id, mm);
mutex_unlock(&sva_lock);