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The trace event cpu_idle provides insufficient information for debugging PSCI requests due to lacking access to determined PSCI domain idle states. The cpu_idle usually only shows -1, 0, or 1 regardless how many idle states the power domain has. Add new trace events namely psci_domain_idle_enter and psci_domain_idle_exit to trace enter and exit events with a determined idle state. These new trace events will help developers debug CPUidle issues on ARM systems using PSCI by providing more detailed information about the requested idle states. Signed-off-by: Keita Morisaki <keyz@google.com> Reviewed-by: Steven Rostedt (Google) <rostedt@goodmis.org> Reviewed-by: Dhruva Gole <d-gole@ti.com> Tested-by: Kevin Hilman <khilman@baylibre.com> Acked-by: Sudeep Holla <sudeep.holla@arm.com> Link: https://lore.kernel.org/r/20250210055828.1875372-1-keyz@google.com Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>