On 10/28/2015 05:55 PM, Alexandre Courbot wrote:
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.
Once L4T for T210 has been released, it'll contain a full set of nvtboot binaries and flashing support. You an easily acquire this internally already; send me an email if you need a link. I'd expect a public SW release by the time any T210 boards capable of running upstream are available.