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. -- To unsubscribe from this list: send the line "unsubscribe linux-tegra" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
