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| author | Robin Murphy <robin.murphy@arm.com> | 2023-08-02 17:20:57 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-08-11 12:08:09 +0200 |
| commit | e3399bd014e9f2faedb66c8660b7f81ef20aa44f (patch) | |
| tree | a7e4f20eba4a9dbef49114e43bb4f405b6d95898 /Documentation | |
| 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>
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/arm64/silicon-errata.rst | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/Documentation/arm64/silicon-errata.rst b/Documentation/arm64/silicon-errata.rst index bbc80eff03f9..9f94afe2fc17 100644 --- a/Documentation/arm64/silicon-errata.rst +++ b/Documentation/arm64/silicon-errata.rst @@ -141,6 +141,8 @@ stable kernels. +----------------+-----------------+-----------------+-----------------------------+ | ARM | MMU-500 | #841119,826419 | N/A | +----------------+-----------------+-----------------+-----------------------------+ +| ARM | MMU-600 | #1076982 | N/A | ++----------------+-----------------+-----------------+-----------------------------+ +----------------+-----------------+-----------------+-----------------------------+ | Broadcom | Brahma-B53 | N/A | ARM64_ERRATUM_845719 | +----------------+-----------------+-----------------+-----------------------------+ |