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Introduce sysctl knobs to allow configuring DPM watchdog timeouts at runtime. Currently, these timeouts are fixed at compile time via CONFIG_DPM_WATCHDOG_TIMEOUT and CONFIG_DPM_WATCHDOG_WARNING_TIMEOUT. This limits flexibility if the timeouts need to be adjusted for different testing scenarios or hardware behaviors without rebuilding the kernel. Add the following sysctl files under /proc/sys/kernel/: - dpm_watchdog_timeout_secs: The total timeout before panic. The maximum value is capped at CONFIG_DPM_WATCHDOG_TIMEOUT to prevent unreasonably large timeouts. - dpm_watchdog_warning_timeout_secs: The warning timeout. The maximum value is capped at the current dpm_watchdog_timeout_secs. Both sysctls have a minimum value of 1. Signed-off-by: Tzung-Bi Shih <tzungbi@kernel.org> Link: https://patch.msgid.link/20260608021526.1023248-4-tzungbi@kernel.org Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>