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FAILED: patch "[PATCH] cpufreq: intel_pstate: Change intel_pstate_get_hwp_max()" failed to apply to 4.19-stable tree

PATCH [email protected] 1 participant 1 message Mar 1, 2021

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Stable branch CPU frequency scaling framework Intel pstate driver
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The patch below does not apply to the 4.19-stable tree.
If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <[email protected]>.

thanks,

greg k-h

------------------ original commit in Linus's tree ------------------

From a45ee4d4e13b0e35a8ec7ea0bf9267243d57b302 Mon Sep 17 00:00:00 2001
From: "Rafael J. Wysocki" <[email protected]>
Date: Thu, 7 Jan 2021 19:43:30 +0100
Subject: [PATCH] cpufreq: intel_pstate: Change intel_pstate_get_hwp_max()
argument

All of the callers of intel_pstate_get_hwp_max() access the struct cpudata object that corresponds to the given CPU already and the function itself needs to access that object (in order to update hwp_cap_cached), so modify the code to pass a struct cpudata pointer to it instead of the CPU number.

Signed-off-by Rafael J. Wysocki <[email protected]>
Tested-by Chen Yu <[email protected]>
drivers/cpufreq/intel_pstate.c +8 -8
index 74bf54e6c993..3eb63daf2523 100644
@@ -819,13 +819,13 @@ static struct freq_attr *hwp_cpufreq_attrs[] = {
 	NULL,
 };
 
-static void intel_pstate_get_hwp_max(unsigned int cpu, int *phy_max,
+static void intel_pstate_get_hwp_max(struct cpudata *cpu, int *phy_max,
 				     int *current_max)
 {
 	u64 cap;
 
-	rdmsrl_on_cpu(cpu, MSR_HWP_CAPABILITIES, &cap);
-	WRITE_ONCE(all_cpu_data[cpu]->hwp_cap_cached, cap);
+	rdmsrl_on_cpu(cpu->cpu, MSR_HWP_CAPABILITIES, &cap);
+	WRITE_ONCE(cpu->hwp_cap_cached, cap);
 	if (global.no_turbo || global.turbo_disabled)
 		*current_max = HWP_GUARANTEED_PERF(cap);
 	else

@@ -1213,7 +1213,7 @@ static void update_qos_request(enum freq_qos_req_type type)
 			continue;
 
 		if (hwp_active)
-			intel_pstate_get_hwp_max(i, &turbo_max, &max_state);
+			intel_pstate_get_hwp_max(cpu, &turbo_max, &max_state);
 		else
 			turbo_max = cpu->pstate.turbo_pstate;
 

@@ -1723,7 +1723,7 @@ static void intel_pstate_get_cpu_pstates(struct cpudata *cpu)
 	if (hwp_active && !hwp_mode_bdw) {
 		unsigned int phy_max, current_max;
 
-		intel_pstate_get_hwp_max(cpu->cpu, &phy_max, &current_max);
+		intel_pstate_get_hwp_max(cpu, &phy_max, &current_max);
 		cpu->pstate.turbo_freq = phy_max * cpu->pstate.scaling;
 		cpu->pstate.turbo_pstate = phy_max;
 	} else {

@@ -2208,7 +2208,7 @@ static void intel_pstate_update_perf_limits(struct cpudata *cpu,
 	 * rather than pure ratios.
 	 */
 	if (hwp_active) {
-		intel_pstate_get_hwp_max(cpu->cpu, &turbo_max, &max_state);
+		intel_pstate_get_hwp_max(cpu, &turbo_max, &max_state);
 	} else {
 		max_state = global.no_turbo || global.turbo_disabled ?
 			cpu->pstate.max_pstate : cpu->pstate.turbo_pstate;

@@ -2323,7 +2323,7 @@ static void intel_pstate_verify_cpu_policy(struct cpudata *cpu,
 	if (hwp_active) {
 		int max_state, turbo_max;
 
-		intel_pstate_get_hwp_max(cpu->cpu, &turbo_max, &max_state);
+		intel_pstate_get_hwp_max(cpu, &turbo_max, &max_state);
 		max_freq = max_state * cpu->pstate.scaling;
 	} else {
 		max_freq = intel_pstate_get_max_freq(cpu);

@@ -2710,7 +2710,7 @@ static int intel_cpufreq_cpu_init(struct cpufreq_policy *policy)
 	if (hwp_active) {
 		u64 value;
 
-		intel_pstate_get_hwp_max(policy->cpu, &turbo_max, &max_state);
+		intel_pstate_get_hwp_max(cpu, &turbo_max, &max_state);
 		policy->transition_delay_us = INTEL_CPUFREQ_TRANSITION_DELAY_HWP;
 		rdmsrl_on_cpu(cpu->cpu, MSR_HWP_REQUEST, &value);
 		WRITE_ONCE(cpu->hwp_req_cached, value);