linux-kernel - [PATCH 3/5] cpufreq/amd-pstate: Refactor amd_pstate_epp_reenable() and amd_pstate_epp

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Message-ID: <20241204144842.164178-4-Dhananjay.Ugwekar@amd.com>
Date: Wed, 4 Dec 2024 14:48:40 +0000
From: Dhananjay Ugwekar <Dhananjay.Ugwekar@....com>
To: <gautham.shenoy@....com>, <mario.limonciello@....com>,
	<perry.yuan@....com>, <rafael@...nel.org>, <viresh.kumar@...aro.org>
CC: <linux-pm@...r.kernel.org>, <linux-kernel@...r.kernel.org>, "Dhananjay
 Ugwekar" <Dhananjay.Ugwekar@....com>
Subject: [PATCH 3/5] cpufreq/amd-pstate: Refactor amd_pstate_epp_reenable() and amd_pstate_epp_offline()

Replace similar code chunks with amd_pstate_update_perf() and
amd_pstate_set_epp() function calls.

Signed-off-by: Dhananjay Ugwekar <Dhananjay.Ugwekar@....com>
---
 drivers/cpufreq/amd-pstate.c | 36 +++++++-----------------------------
 1 file changed, 7 insertions(+), 29 deletions(-)

diff --git a/drivers/cpufreq/amd-pstate.c b/drivers/cpufreq/amd-pstate.c
index a1b2393cef22..a38be7727c9d 100644
--- a/drivers/cpufreq/amd-pstate.c
+++ b/drivers/cpufreq/amd-pstate.c
@@ -1630,25 +1630,17 @@ static int amd_pstate_epp_set_policy(struct cpufreq_policy *policy)
 
 static void amd_pstate_epp_reenable(struct amd_cpudata *cpudata)
 {
-	struct cppc_perf_ctrls perf_ctrls;
-	u64 value, max_perf;
+	u64 max_perf;
 	int ret;
 
 	ret = amd_pstate_cppc_enable(true);
 	if (ret)
 		pr_err("failed to enable amd pstate during resume, return %d\n", ret);
 
-	value = READ_ONCE(cpudata->cppc_req_cached);
 	max_perf = READ_ONCE(cpudata->highest_perf);
 
-	if (cpu_feature_enabled(X86_FEATURE_CPPC)) {
-		wrmsrl_on_cpu(cpudata->cpu, MSR_AMD_CPPC_REQ, value);
-	} else {
-		perf_ctrls.max_perf = max_perf;
-		cppc_set_perf(cpudata->cpu, &perf_ctrls);
-		perf_ctrls.energy_perf = AMD_CPPC_ENERGY_PERF_PREF(cpudata->epp_cached);
-		cppc_set_epp_perf(cpudata->cpu, &perf_ctrls, 1);
-	}
+	amd_pstate_update_perf(cpudata, 0, 0, max_perf, false);
+	amd_pstate_set_epp(cpudata, cpudata->epp_cached);
 }
 
 static int amd_pstate_epp_cpu_online(struct cpufreq_policy *policy)
@@ -1668,7 +1660,6 @@ static int amd_pstate_epp_cpu_online(struct cpufreq_policy *policy)
 static void amd_pstate_epp_offline(struct cpufreq_policy *policy)
 {
 	struct amd_cpudata *cpudata = policy->driver_data;
-	struct cppc_perf_ctrls perf_ctrls;
 	int min_perf;
 	u64 value;
 
@@ -1676,23 +1667,10 @@ static void amd_pstate_epp_offline(struct cpufreq_policy *policy)
 	value = READ_ONCE(cpudata->cppc_req_cached);
 
 	mutex_lock(&amd_pstate_limits_lock);
-	if (cpu_feature_enabled(X86_FEATURE_CPPC)) {
-		cpudata->epp_policy = CPUFREQ_POLICY_UNKNOWN;
-
-		/* Set max perf same as min perf */
-		value &= ~AMD_CPPC_MAX_PERF(~0L);
-		value |= AMD_CPPC_MAX_PERF(min_perf);
-		value &= ~AMD_CPPC_MIN_PERF(~0L);
-		value |= AMD_CPPC_MIN_PERF(min_perf);
-		wrmsrl_on_cpu(cpudata->cpu, MSR_AMD_CPPC_REQ, value);
-	} else {
-		perf_ctrls.desired_perf = 0;
-		perf_ctrls.min_perf = min_perf;
-		perf_ctrls.max_perf = min_perf;
-		cppc_set_perf(cpudata->cpu, &perf_ctrls);
-		perf_ctrls.energy_perf = AMD_CPPC_ENERGY_PERF_PREF(HWP_EPP_BALANCE_POWERSAVE);
-		cppc_set_epp_perf(cpudata->cpu, &perf_ctrls, 1);
-	}
+
+	amd_pstate_update_perf(cpudata, min_perf, 0, min_perf, false);
+	amd_pstate_set_epp(cpudata, AMD_CPPC_EPP_BALANCE_POWERSAVE);
+
 	mutex_unlock(&amd_pstate_limits_lock);
 }
 
-- 
2.34.1