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| author | Robin Murphy <robin.murphy@arm.com> | 2023-05-10 16:38:43 +0100 |
|---|---|---|
| committer | Will Deacon <will@kernel.org> | 2023-06-08 21:58:12 +0100 |
| commit | f322e8af35c7f23a8c08b595c38d6c855b2d836f (patch) | |
| tree | 1a91a9fdb93761f0c8e29f693ff22337bf847c3e /Makefile | |
| parent | 44c026a73be8038f03dbdeef028b642880cf1511 (diff) | |
| download | lwn-f322e8af35c7f23a8c08b595c38d6c855b2d836f.tar.gz lwn-f322e8af35c7f23a8c08b595c38d6c855b2d836f.zip | |
iommu/arm-smmu-v3: Work around MMU-600 erratum 1076982
MMU-600 versions prior to r1p0 fail to correctly generate a WFE wakeup
event when the command queue transitions fom full to non-full. We can
easily work around this by simply hiding the SEV capability such that we
fall back to polling for space in the queue - since MMU-600 implements
MSIs we wouldn't expect to need SEV for sync completion either, so this
should have little to no impact.
Signed-off-by: Robin Murphy <robin.murphy@arm.com>
Reviewed-by: Nicolin Chen <nicolinc@nvidia.com>
Tested-by: Nicolin Chen <nicolinc@nvidia.com>
Link: https://lore.kernel.org/r/08adbe3d01024d8382a478325f73b56851f76e49.1683731256.git.robin.murphy@arm.com
Signed-off-by: Will Deacon <will@kernel.org>
Diffstat (limited to 'Makefile')
0 files changed, 0 insertions, 0 deletions