Re: [PATCH v2 0/5] iommu: Support identity mappings of reserved-memory regions

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23.04.2021 19:32, Thierry Reding пишет:
> Note that there will be no new releases of the bootloader for earlier
> devices, so adding support for these new DT bindings will not be
> practical. The bootloaders on those devices do pass information about
> the active framebuffer via the kernel command-line, so we may want to
> add code to create reserved regions in the IOMMU based on that.

Since this change requires a bootloader update anyways, why it's not
possible to fix the bootloader properly, making it to stop all the DMA
activity before jumping into kernel?



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