5 Aug
2015
5 Aug
'15
8:33 p.m.
On 07/29/2015 01:47 PM, Stephen Warren wrote:
From: Stephen Warren swarren@nvidia.com
Additionally, ARM64 devices typically run a secure monitor in EL3 and U-Boot in EL2, and set up some secure RAM carve-outs to contain the EL3 code and data. These carve-outs are located at the top of 32-bit address space. Restrict U-Boot's RAM usage to well below the location of those carve-outs. Ideally, we would the secure monitor would inform U-Boot of exactly which RAM it could use at run-time. However, I'm not sure how to do that at present (and even if such a mechanism does exist, it would likely not be generic across all forms of secure monitor).
TomW, what are your thoughts on applying this given the discussion thread? Thanks.