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author | Robin Murphy <robin.murphy@arm.com> | 2023-08-02 17:20:57 +0000 |
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committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-08-11 12:08:09 +0200 |
commit | e3399bd014e9f2faedb66c8660b7f81ef20aa44f (patch) | |
tree | a7e4f20eba4a9dbef49114e43bb4f405b6d95898 /.mailmap | |
parent | 50c24f0c940728792c8bdf65c1eaf6b91b3b0dcd (diff) | |
download | linux-e3399bd014e9f2faedb66c8660b7f81ef20aa44f.tar.gz |
iommu/arm-smmu-v3: Work around MMU-600 erratum 1076982
commit f322e8af35c7f23a8c08b595c38d6c855b2d836f upstream 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> Signed-off-by: Easwar Hariharan <eahariha@linux.microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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