[coreboot] Thinkpad SD card controller DMA

[Jose Trujillo]

Hello Thomas,

It is not enough just to disable it from the devicetree ?

JT.

‐‐‐‐‐‐‐ Original Message ‐‐‐‐‐‐‐

On June 21, 2018 1:43 PM, Thomasheidler via coreboot <coreboot at coreboot.org> wrote:

> Thanks for your response and suggestions.
> 
> Luckily I don’t need the SD card reader and would rather completely disable it to protect against any DMA attack before the kernel initializes IOMMU. The problem is that I don’t know how to prevent the controller from initializing at all, short of actually desoldering the chip from the mainboard, which is risky.
> 
> Regarding the EC, are you aware of any working libre replacement for the EC on any Lenovo Thinkpad?
> 
> 
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