Re: [PATCH v3 5/8] iommu/arm-smmu-qcom: Consistently initialize stream mappings
From: Sai Prakash Ranjan <hidden>
Date: 2020-09-11 08:27:44
On 2020-09-04 21:25, 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. Signed-off-by: Bjorn Andersson <redacted> ---
Reviewed-by: Sai Prakash Ranjan <redacted> Tested-by: Sai Prakash Ranjan <redacted> -- QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, hosted by The Linux Foundation _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel