Re: [PATCH v4 3/3] iommu/arm-smmu-qcom: Implement S2CR quirk

2020-10-19 Thread Bjorn Andersson
On Mon 19 Oct 09:04 CDT 2020, Robin Murphy wrote: > On 2020-10-17 05:39, Bjorn Andersson wrote: > > The firmware found in some Qualcomm platforms intercepts writes to S2CR > > in order to replace bypass type streams with fault; and ignore S2CR > > updates of type fault. > > > > Detect this behavi

Re: [PATCH v4 3/3] iommu/arm-smmu-qcom: Implement S2CR quirk

2020-10-19 Thread Robin Murphy
On 2020-10-17 05:39, Bjorn Andersson wrote: The firmware found in some Qualcomm platforms intercepts writes to S2CR in order to replace bypass type streams with fault; and ignore S2CR updates of type fault. Detect this behavior and implement a custom write_s2cr function in order to trick the fir

[PATCH v4 3/3] iommu/arm-smmu-qcom: Implement S2CR quirk

2020-10-16 Thread Bjorn Andersson
The firmware found in some Qualcomm platforms intercepts writes to S2CR in order to replace bypass type streams with fault; and ignore S2CR updates of type fault. Detect this behavior and implement a custom write_s2cr function in order to trick the firmware into supporting bypass streams by the me