android-mainline/NOUPSTREAM-ANDROID-add-vendor-hooks-to-override-show_cpufinfo_max_freq.patch

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Todd Kjos <tkjos@google.com>
Date: Mon, 23 Nov 2020 11:08:48 -0800
Subject: NOUPSTREAM: ANDROID: add vendor hooks to override
 show_cpufinfo_max_freq

QC value-add requires the ability to override the value displayed
by show_cpuinfo_max_freq.

[CPNOTE: 03/06/21] Lee: Vendor related code - maintain forever

Bug: 173984660
Signed-off-by: Todd Kjos <tkjos@google.com>
Change-Id: Ida11256f399f0730bc1228524b9687df3e7b8bf4
---
 drivers/android/vendor_hooks.c |  3 +++
 drivers/cpufreq/cpufreq.c      | 10 +++++++++-
 drivers/cpufreq/freq_table.c   |  2 ++
 include/trace/hooks/cpufreq.h  | 25 +++++++++++++++++++++++++
 4 files changed, 39 insertions(+), 1 deletion(-)
 create mode 100644 include/trace/hooks/cpufreq.h

diff --git a/drivers/android/vendor_hooks.c b/drivers/android/vendor_hooks.c
--- a/drivers/android/vendor_hooks.c
+++ b/drivers/android/vendor_hooks.c
@@ -23,6 +23,7 @@
 #include <trace/hooks/printk.h>
 #include <trace/hooks/gic_v3.h>
 #include <trace/hooks/epoch.h>
+#include <trace/hooks/cpufreq.h>
 #include <trace/hooks/mm.h>
 #include <trace/hooks/preemptirq.h>
 #include <trace/hooks/ftrace_dump.h>
@@ -81,6 +82,8 @@ EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_gic_v3_set_affinity);
 EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_gic_v3_affinity_init);
 EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_show_suspend_epoch_val);
 EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_show_resume_epoch_val);
+EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_show_max_freq);
+EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_freq_table_limits);
 EXPORT_TRACEPOINT_SYMBOL_GPL(android_rvh_sched_newidle_balance);
 EXPORT_TRACEPOINT_SYMBOL_GPL(android_rvh_sched_nohz_balancer_kick);
 EXPORT_TRACEPOINT_SYMBOL_GPL(android_rvh_find_busiest_queue);
diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c
--- a/drivers/cpufreq/cpufreq.c
+++ b/drivers/cpufreq/cpufreq.c
@@ -30,6 +30,7 @@
 #include <linux/syscore_ops.h>
 #include <linux/tick.h>
 #include <trace/events/power.h>
+#include <trace/hooks/cpufreq.h>
 
 static LIST_HEAD(cpufreq_policy_list);
 
@@ -690,8 +691,15 @@ static ssize_t show_##file_name				\
 	return sprintf(buf, "%u\n", policy->object);	\
 }
 
+static ssize_t show_cpuinfo_max_freq(struct cpufreq_policy *policy, char *buf)
+{
+	unsigned int max_freq = policy->cpuinfo.max_freq;
+
+	trace_android_vh_show_max_freq(policy, &max_freq);
+	return sprintf(buf, "%u\n", max_freq);
+}
+
 show_one(cpuinfo_min_freq, cpuinfo.min_freq);
-show_one(cpuinfo_max_freq, cpuinfo.max_freq);
 show_one(cpuinfo_transition_latency, cpuinfo.transition_latency);
 show_one(scaling_min_freq, min);
 show_one(scaling_max_freq, max);
diff --git a/drivers/cpufreq/freq_table.c b/drivers/cpufreq/freq_table.c
--- a/drivers/cpufreq/freq_table.c
+++ b/drivers/cpufreq/freq_table.c
@@ -9,6 +9,7 @@
 
 #include <linux/cpufreq.h>
 #include <linux/module.h>
+#include <trace/hooks/cpufreq.h>
 
 /*********************************************************************
  *                     FREQUENCY TABLE HELPERS                       *
@@ -51,6 +52,7 @@ int cpufreq_frequency_table_cpuinfo(struct cpufreq_policy *policy,
 			max_freq = freq;
 	}
 
+	trace_android_vh_freq_table_limits(policy, min_freq, max_freq);
 	policy->min = policy->cpuinfo.min_freq = min_freq;
 	policy->max = max_freq;
 	/*
diff --git a/include/trace/hooks/cpufreq.h b/include/trace/hooks/cpufreq.h
new file mode 100644
--- /dev/null
+++ b/include/trace/hooks/cpufreq.h
@@ -0,0 +1,25 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#undef TRACE_SYSTEM
+#define TRACE_SYSTEM cpufreq
+
+#define TRACE_INCLUDE_PATH trace/hooks
+
+#if !defined(_TRACE_HOOK_CPUFREQ_H) || defined(TRACE_HEADER_MULTI_READ)
+#define _TRACE_HOOK_CPUFREQ_H
+
+#include <linux/cpufreq.h>
+#include <linux/tracepoint.h>
+#include <trace/hooks/vendor_hooks.h>
+
+DECLARE_HOOK(android_vh_show_max_freq,
+	TP_PROTO(struct cpufreq_policy *policy, unsigned int *max_freq),
+	TP_ARGS(policy, max_freq));
+
+DECLARE_HOOK(android_vh_freq_table_limits,
+	TP_PROTO(struct cpufreq_policy *policy, unsigned int min_freq,
+		 unsigned int max_freq),
+	TP_ARGS(policy, min_freq, max_freq));
+
+#endif /* _TRACE_HOOK_CPUFREQ_H */
+/* This part must be outside protection */
+#include <trace/define_trace.h>