Commit 86e5ca09 authored by Jason Gunthorpe's avatar Jason Gunthorpe Committed by Will Deacon
Browse files

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



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: default avatarNicolin Chen <nicolinc@nvidia.com>
Tested-by: default avatarShameer Kolothum <shameerali.kolothum.thodi@huawei.com>
Reviewed-by: default avatarMichael Shavit <mshavit@google.com>
Reviewed-by: default avatarNicolin Chen <nicolinc@nvidia.com>
Reviewed-by: default avatarMoritz Fischer <moritzf@google.com>
Reviewed-by: default avatarMostafa Saleh <smostafa@google.com>
Signed-off-by: default avatarJason Gunthorpe <jgg@nvidia.com>
Link: https://lore.kernel.org/r/4-v6-228e7adf25eb+4155-smmuv3_newapi_p2_jgg@nvidia.com


Signed-off-by: default avatarWill Deacon <will@kernel.org>
parent fdc69d39

drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c

+4 −1
Original line number Diff line number Diff line
@@ -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);

}