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feat(psci): require validate_power_state to expose CPU_SUSPEND

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psci_cpu_suspend unconditionally calls psci_validate_power_state, which
asserts that the platform implements ops->validate_power_state. To avoid
a failure at runtime, do not expose CPU_SUSPEND unless that callback is
implemented. This also allows a platform to provide SYSTEM_SUSPEND
without providing CPU_SUSPEND.

Signed-off-by: Samuel Holland <samuel@sholland.org>
Change-Id: I5dafb7845f482ab3af03a9de562def41dd70189e
This commit is contained in:
Samuel Holland 2021-04-28 17:52:02 -05:00 • committed by Manish Pandey
parent 02d36a92fc
commit a1d5ac6a5a
1 changed files with 2 additions and 1 deletions
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lib/psci/psci_setup.c
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@ -250,6 +250,7 @@ int __init psci_setup(const psci_lib_args_t *lib_args)
psci_caps |= define_psci_cap(PSCI_CPU_ON_AARCH64);
if ((psci_plat_pm_ops->pwr_domain_suspend != NULL) &&
(psci_plat_pm_ops->pwr_domain_suspend_finish != NULL)) {
if (psci_plat_pm_ops->validate_power_state != NULL)
psci_caps |= define_psci_cap(PSCI_CPU_SUSPEND_AARCH64);
if (psci_plat_pm_ops->get_sys_suspend_power_state != NULL)
psci_caps |= define_psci_cap(PSCI_SYSTEM_SUSPEND_AARCH64);