tree 341df6d7d352afc086f6315d9fef4f25e84651f3
parent b88a4416b5e5f2bda2240c632ba79e15a9a75c45
author Wing Li <wingers@google.com> 1663186697 -0700
committer Wing Li <wingers@google.com> 1679376035 -0700

feat(psci): add support for OS-initiated mode

This patch adds a `psci_validate_state_coordination` function that is
called by `psci_cpu_suspend_start` in OS-initiated mode.

This function validates the request per sections 4.2.3.2, 5.4.5, and 6.3
of the PSCI spec (DEN0022D.b):
- The requested power states are consistent with the system's state
- The calling core is the last running core at the requested power level

This function differs from `psci_do_state_coordination` in that:
- The `psci_req_local_pwr_states` map is not modified if the request
  were to be denied
- The `state_info` argument is never modified since it contains the
  power states requested by the calling OS

This is conditionally compiled into the build depending on the value of
the `PSCI_OS_INIT_MODE` build option.

Change-Id: I667041c842d2856e9d128c98db4d5ae4e4552df3
Signed-off-by: Wing Li <wingers@google.com>