soc/intel/meteorlake: Add EPP override support

This updates energy performance preference value to all logical CPUs
when the corresponding chip config is true.

This patch is backported from
`commit 0bb2225718 ("soc/intel/alderlake: Add EPP override
support")`.

BUG=b:266522659
TEST=Able to build and boot google/rex.

Signed-off-by: Subrata Banik <subratabanik@google.com>
Change-Id: I8172276159fe3987dae36ec30ebceb76dd0ef326
Reviewed-on: https://review.coreboot.org/c/coreboot/+/74154
Reviewed-by: Eric Lai <eric_lai@quanta.corp-partner.google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/soc/intel/meteorlake/chip.h

@@ -346,6 +346,10 @@ struct soc_intel_meteorlake_config {
 
 	/* Enable PCH to CPU energy report feature. */
 	bool pch_pm_energy_report_enable;
+
+	/* Energy-Performance Preference (HWP feature) */
+	bool enable_energy_perf_pref;
+	uint8_t energy_perf_pref_value;
 };
 
 typedef struct soc_intel_meteorlake_config config_t;

src/soc/intel/meteorlake/cpu.c

@@ -124,6 +124,12 @@ void soc_core_init(struct device *cpu)
 	/* Set energy policy */
 	set_energy_perf_bias(ENERGY_POLICY_NORMAL);
 
+	const config_t *conf = config_of_soc();
+	/* Set energy-performance preference */
+	if (conf->enable_energy_perf_pref)
+		if (check_energy_perf_cap())
+			set_energy_perf_pref(conf->energy_perf_pref_value);
+
 	/* Enable Turbo */
 	enable_turbo();
 
@@ -140,6 +146,19 @@ static void per_cpu_smm_trigger(void)
 	smm_relocate();
 }
 
+static void pre_mp_init(void)
+{
+	soc_fsp_load();
+
+	const config_t *conf = config_of_soc();
+	if (conf->enable_energy_perf_pref) {
+		if (check_energy_perf_cap())
+			enable_energy_perf_pref();
+		else
+			printk(BIOS_WARNING, "Energy Performance Preference not supported!\n");
+	}
+}
+
 static void post_mp_init(void)
 {
 	/* Set Max Ratio */
@@ -160,7 +179,7 @@ static const struct mp_ops mp_ops = {
 	 * that are set prior to ramstage.
 	 * Real MTRRs programming are being done after resource allocation.
 	 */
-	.pre_mp_init = soc_fsp_load,
+	.pre_mp_init = pre_mp_init,
 	.get_cpu_count = get_cpu_count,
 	.get_smm_info = smm_info,
 	.get_microcode_info = get_microcode_info,