tree c3be66a37ca2353f52a3e1b25ce54bf8e7603713
parent e456f532b031086f952b46dc6bb7eb8d4fa399a3
author Raghu Krishnamurthy <raghupathyk@nvidia.com> 1717466549 -0700
committer Raghu Krishnamurthy <raghupathyk@nvidia.com> 1729005628 -0700

feat(rmmd): el3 token sign during attestation

Add required SMCs by RMM to push attestation signing requests to EL3
and get responses. EL3 may then choose to push these requests to a HES
as suitable for a platform. This patch also supports the new
RMM_EL3_FEATURES interface, that RMM can use to query for support for
HES based signing. The new interface exposes a feature register with
different bits defining different discoverable features. This new
interface is available starting the 0.4 version of the RMM-EL3
interface, causing the version to bump up. This patch also adds a
platform port for FVP that implements the platform hooks required to
enable the new SMCs, but it does not push to a HES and instead copies a
zeroed buffer in EL3.

Change-Id: I69c110252835122a9533e71bdcce10b5f2a686b2
Signed-off-by: Raghu Krishnamurthy <raghupathyk@nvidia.com>