[PATCH] examples/l3fwd-power: support CPPC cpufreq

[Jie Hai <haijie1@huawei.com>]

Currently the l3fwd-power only supports ACPI cpufreq and Pstate
cpufreq, This patch adds CPPC cpufreq.

Signed-off-by: Jie Hai <haijie1@huawei.com>
---
 examples/l3fwd-power/main.c | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/examples/l3fwd-power/main.c b/examples/l3fwd-power/main.c
index fd3ade330f82..5090d5598172 100644
--- a/examples/l3fwd-power/main.c
+++ b/examples/l3fwd-power/main.c
@@ -2453,9 +2453,10 @@ init_power_library(void)
 		/* we're not supporting the VM channel mode */
 		env = rte_power_get_env();
 		if (env != PM_ENV_ACPI_CPUFREQ &&
-				env != PM_ENV_PSTATE_CPUFREQ) {
+				env != PM_ENV_PSTATE_CPUFREQ &&
+				env != PM_ENV_CPPC_CPUFREQ) {
 			RTE_LOG(ERR, POWER,
-				"Only ACPI and PSTATE mode are supported\n");
+				"Only ACPI, PSTATE and CPPC mode are supported\n");
 			return -1;
 		}
 	}
@@ -2639,12 +2640,14 @@ autodetect_mode(void)
 	/*
 	 * Empty poll and telemetry modes have to be specifically requested to
 	 * be enabled, but we can auto-detect between interrupt mode with or
-	 * without frequency scaling. Both ACPI and pstate can be used.
+	 * without frequency scaling. Any of ACPI, pstate and CPPC can be used.
 	 */
 	if (rte_power_check_env_supported(PM_ENV_ACPI_CPUFREQ))
 		return APP_MODE_LEGACY;
 	if (rte_power_check_env_supported(PM_ENV_PSTATE_CPUFREQ))
 		return APP_MODE_LEGACY;
+	if (rte_power_check_env_supported(PM_ENV_CPPC_CPUFREQ))
+		return APP_MODE_LEGACY;
 
 	RTE_LOG(NOTICE, L3FWD_POWER, "Frequency scaling not supported, selecting interrupt-only mode\n");
 
-- 
2.30.0