Hi Jean,
On 2017/10/6 21:31, Jean-Philippe Brucker wrote:
> If the SMMU supports it and the kernel was built with HTTU support, enable
> + if (IS_ENABLED(CONFIG_ARM64_HW_AFDBM) && (reg & (IDR0_HA | IDR0_HD))) {
> + smmu->features |= ARM_SMMU_FEAT_HA;
> + if (reg & IDR0_HD)
> + smmu->features |= ARM_SMMU_FEAT_HD;
> + }
What is relationship of armv8.1 HW_AFDBM and SMMUv3 HTTU? I mean why we need
IS_ENABLED(CONFIG_ARM64_HW_AFDBM) ?
If CONFIG_ARM64_HW_AFDBM=y but the process do not support ARMv8.1, should it also
enable related feature for SMMUv3?
Thanks
Yisheng Xie
> +
> /*
> * If the CPU is using VHE, but the SMMU doesn't support it, the SMMU
> * will create TLB entries for NH-EL1 world and will miss the
>
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