On 10/29/2015 02:59 AM, Stephen Warren wrote:
On 10/18/2015 10:57 PM, Alexandre Courbot wrote:
T210's GPU secure firmware loading requires a write-protected region
to be set up.
This patch reserves the upper 256KB of RAM as the WPR region and locks
it so the kernel can initiate secure firmware loading.
On T210, it's the responsibility of nvtboot (which runs before U-Boot)
to set up any and all carve-outs. This code should not be necessary, and
indeed I expect the registers it touches can't actually be programmed
from U-Boot, which runs in non-secure mode after WPR is already locked.
Ok, I was running from Thierry's miniloader which did not program or
lock these registers.
The question then is: do we have an official nvtboot binary available
for upstream support? AFAICT Thierry's miniloader solution is the only
solution available to the public, and without this setup one cannot use
the GPU on T210.
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