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iommu/arm-smmu-v3: Do not ATC invalidate the entire domain

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At this point we know which master we are going to change the PCI config
on, this is the only device we need to invalidate. Switch
arm_smmu_atc_inv_domain() for arm_smmu_atc_inv_master().

Tested-by: Nicolin Chen <nicolinc@nvidia.com>
Tested-by: Shameer Kolothum <shameerali.kolothum.thodi@huawei.com>
Reviewed-by: Michael Shavit <mshavit@google.com>
Reviewed-by: Nicolin Chen <nicolinc@nvidia.com>
Reviewed-by: Moritz Fischer <moritzf@google.com>
Reviewed-by: Mostafa Saleh <smostafa@google.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Link: https://lore.kernel.org/r/4-v6-228e7adf25eb+4155-smmuv3_newapi_p2_jgg@nvidia.com
Signed-off-by: Will Deacon <will@kernel.org>
This commit is contained in:
Jason Gunthorpe 2024-03-27 15:07:50 -03:00 committed by Will Deacon
parent fdc69d39e7
commit 86e5ca098d
1 changed files with 4 additions and 1 deletions
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5
drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c
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@ -2410,7 +2410,10 @@ static void arm_smmu_enable_ats(struct arm_smmu_master *master,
pdev = to_pci_dev(master->dev);
atomic_inc(&smmu_domain->nr_ats_masters);
arm_smmu_atc_inv_domain(smmu_domain, IOMMU_NO_PASID, 0, 0);
/*
* ATC invalidation of PASID 0 causes the entire ATC to be flushed.
*/
arm_smmu_atc_inv_master(master);
if (pci_enable_ats(pdev, stu))
dev_err(master->dev, "Failed to enable ATS (STU %zu)\n", stu);
}