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| author | Jean-Philippe Brucker | 2019-07-03 13:19:20 +0200 |
|---|---|---|
| committer | Joerg Roedel | 2019-07-04 10:03:27 +0200 |
| commit | 8dd8f005bdd45823fc153ef490239558caf6ff20 (patch) | |
| tree | 3f17e360918065e360b58e9305d45d26992560c2 /drivers/iommu/intel-pasid.c | |
| parent | iommu/arm-smmu-v3: Fix compilation when CONFIG_CMA=n (diff) | |
| download | kernel-qcow2-linux-8dd8f005bdd45823fc153ef490239558caf6ff20.tar.gz kernel-qcow2-linux-8dd8f005bdd45823fc153ef490239558caf6ff20.tar.xz kernel-qcow2-linux-8dd8f005bdd45823fc153ef490239558caf6ff20.zip | |
iommu/arm-smmu-v3: Invalidate ATC when detaching a device
We make the invalid assumption in arm_smmu_detach_dev() that the ATC is
clear after calling pci_disable_ats(). For one thing, only enabling the
PCIe ATS capability constitutes an implicit invalidation event, so the
comment was wrong. More importantly, the ATS capability isn't necessarily
disabled by pci_disable_ats() in a PF, if the associated VFs have ATS
enabled. Explicitly invalidate all ATC entries in arm_smmu_detach_dev().
The endpoint cannot form new ATC entries because STE.EATS is clear.
Fixes: 9ce27afc0830 ("iommu/arm-smmu-v3: Add support for PCI ATS")
Reported-by: Manoj Kumar <Manoj.Kumar3@arm.com>
Reported-by: Robin Murphy <Robin.Murphy@arm.com>
Signed-off-by: Jean-Philippe Brucker <jean-philippe.brucker@arm.com>
Acked-by: Will Deacon <will@kernel.org>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Diffstat (limited to 'drivers/iommu/intel-pasid.c')
0 files changed, 0 insertions, 0 deletions