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linux/drivers/iommu/arm
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AngeloGioacchino Del Regno d9c47d2bf3 iommu/qcom: Disable and reset context bank before programming 
[ Upstream commit 9f3fef23d9 ]

Writing	the new	TTBRs, TCRs and MAIRs on a previously enabled
context bank may trigger a context fault, resulting in firmware
driven AP resets: change the domain initialization programming
sequence to disable the context bank(s) and to also clear the
related fault address (CB_FAR) and fault status (CB_FSR)
registers before writing new values to TTBR0/1, TCR/TCR2, MAIR0/1.

Fixes: 0ae349a0f3 ("iommu/qcom: Add qcom_iommu")
Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Link: https://lore.kernel.org/r/20230622092742.74819-4-angelogioacchino.delregno@collabora.com
Signed-off-by: Will Deacon <will@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
History 2023-09-13 09:42:54 +02:00
..
arm-smmu iommu/qcom: Disable and reset context bank before programming 2023-09-13 09:42:54 +02:00
arm-smmu-v3 iommu/arm-smmu-v3: Document nesting-related errata 2023-08-11 12:08:09 +02:00
Makefile iommu/arm-smmu: Move Arm SMMU drivers into their own subdirectory 2020-07-27 12:53:10 +01:00