Re: [PATCH 4/5] iommu/arm-smmu-qcom: Consstently initialize stream mappings

Vinod Koul
2020-07-09T07:32:15Z

On 08-07-20, 22:01, Bjorn Andersson wrote:
> Firmware that traps writes to S2CR to translate BYPASS into FAULT also
> ignores writes of type FAULT. As such booting with "disable_bypass" set
> will result in all S2CR registers left as configured by the bootloader.
>
> This has been seen to result in indeterministic results, as these
> mappings might linger and reference context banks that Linux is
> reconfiguring.
>
> Use the fact that BYPASS writes result in FAULT type to force all stream
> mappings to FAULT.

s/Consstently/Consistently in patch subject

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~Vinod