diff options
author | Rob Clark <robdclark@chromium.org> | 2023-12-10 10:06:53 -0800 |
---|---|---|
committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-01-25 15:35:46 -0800 |
commit | 979dc1cbd865888431a692e7385401ec869d33d0 (patch) | |
tree | 89f0ca3170c4ac8cd70ceb5921f176ef5f0b22ba /rust/alloc | |
parent | 8c8bcd45e9b10eef12321f08d2e5be33d615509c (diff) | |
download | linux-stable-979dc1cbd865888431a692e7385401ec869d33d0.tar.gz linux-stable-979dc1cbd865888431a692e7385401ec869d33d0.tar.bz2 linux-stable-979dc1cbd865888431a692e7385401ec869d33d0.zip |
iommu/arm-smmu-qcom: Add missing GMU entry to match table
commit afc95681c3068956fed1241a1ff1612c066c75ac upstream.
In some cases the firmware expects cbndx 1 to be assigned to the GMU,
so we also want the default domain for the GMU to be an identy domain.
This way it does not get a context bank assigned. Without this, both
of_dma_configure() and drm/msm's iommu_domain_attach() will trigger
allocating and configuring a context bank. So GMU ends up attached to
both cbndx 1 and later cbndx 2. This arrangement seemingly confounds
and surprises the firmware if the GPU later triggers a translation
fault, resulting (on sc8280xp / lenovo x13s, at least) in the SMMU
getting wedged and the GPU stuck without memory access.
Cc: stable@vger.kernel.org
Signed-off-by: Rob Clark <robdclark@chromium.org>
Tested-by: Johan Hovold <johan+linaro@kernel.org>
Reviewed-by: Robin Murphy <robin.murphy@arm.com>
Link: https://lore.kernel.org/r/20231210180655.75542-1-robdclark@gmail.com
Signed-off-by: Will Deacon <will@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'rust/alloc')
0 files changed, 0 insertions, 0 deletions