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[v2,03/27] iommu/arm-smmu-v3: Do not ATC invalidate the entire domain

Message ID 3-v2-16665a652079+5947-smmuv3_newapi_p2_jgg@nvidia.com (mailing list archive)
State New, archived
Headers show
Series Update SMMUv3 to the modern iommu API (part 2/3) | expand

Commit Message

Jason Gunthorpe Nov. 1, 2023, 11:36 p.m. UTC 
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().

Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
---
 drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c
index 43f5531795f0b0..9a0eaae586f2e1 100644
--- a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c
+++ b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c
@@ -2416,7 +2416,10 @@  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);
 }