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2024-12-19 9370bb92b2d16684ee45cf24e879c93c509162da 
 kernel/drivers/cpufreq/acpi-cpufreq.c
....@@ -1,3 +1,4 @@
1
+// SPDX-License-Identifier: GPL-2.0-or-later
12 /*
23  * acpi-cpufreq.c - ACPI Processor P-States Driver
34  *
....@@ -5,24 +6,6 @@
56  *  Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
67  *  Copyright (C) 2002 - 2004 Dominik Brodowski <linux@brodo.de>
78  *  Copyright (C) 2006       Denis Sadykov <denis.m.sadykov@intel.com>
8
- *
9
- * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
10
- *
11
- *  This program is free software; you can redistribute it and/or modify
12
- *  it under the terms of the GNU General Public License as published by
13
- *  the Free Software Foundation; either version 2 of the License, or (at
14
- *  your option) any later version.
15
- *
16
- *  This program is distributed in the hope that it will be useful, but
17
- *  WITHOUT ANY WARRANTY; without even the implied warranty of
18
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
19
- *  General Public License for more details.
20
- *
21
- *  You should have received a copy of the GNU General Public License along
22
- *  with this program; if not, write to the Free Software Foundation, Inc.,
23
- *  59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
24
- *
25
- * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
269  */
2710 
2811 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
....@@ -43,10 +26,12 @@
4326 #include <linux/uaccess.h>
4427 
4528 #include <acpi/processor.h>
29
+#include <acpi/cppc_acpi.h>
4630 
4731 #include <asm/msr.h>
4832 #include <asm/processor.h>
4933 #include <asm/cpufeature.h>
34
+#include <asm/cpu_device_id.h>
5035 
5136 MODULE_AUTHOR("Paul Diefenbaugh, Dominik Brodowski");
5237 MODULE_DESCRIPTION("ACPI Processor P-States Driver");
....@@ -61,6 +46,7 @@
6146 
6247 #define INTEL_MSR_RANGE		(0xffff)
6348 #define AMD_MSR_RANGE		(0x7)
49
+#define HYGON_MSR_RANGE		(0x7)
6450 
6551 #define MSR_K7_HWCR_CPB_DIS	(1ULL << 25)
6652 
....@@ -95,6 +81,7 @@
9581 		rdmsr_on_cpu(cpu, MSR_IA32_MISC_ENABLE, &lo, &hi);
9682 		msr = lo | ((u64)hi << 32);
9783 		return !(msr & MSR_IA32_MISC_ENABLE_TURBO_DISABLE);
84
+	case X86_VENDOR_HYGON:
9885 	case X86_VENDOR_AMD:
9986 		rdmsr_on_cpu(cpu, MSR_K7_HWCR, &lo, &hi);
10087 		msr = lo | ((u64)hi << 32);
....@@ -113,6 +100,7 @@
113100 		msr_addr = MSR_IA32_MISC_ENABLE;
114101 		msr_mask = MSR_IA32_MISC_ENABLE_TURBO_DISABLE;
115102 		break;
103
+	case X86_VENDOR_HYGON:
116104 	case X86_VENDOR_AMD:
117105 		msr_addr = MSR_K7_HWCR;
118106 		msr_mask = MSR_K7_HWCR_CPB_DIS;
....@@ -139,12 +127,12 @@
139127 	boost_set_msr(enable);
140128 }
141129 
142
-static int set_boost(int val)
130
+static int set_boost(struct cpufreq_policy *policy, int val)
143131 {
144
-	get_online_cpus();
145
-	on_each_cpu(boost_set_msr_each, (void *)(long)val, 1);
146
-	put_online_cpus();
147
-	pr_debug("Core Boosting %sabled.\n", val ? "en" : "dis");
132
+	on_each_cpu_mask(policy->cpus, boost_set_msr_each,
133
+			 (void *)(long)val, 1);
134
+	pr_debug("CPU %*pbl: Core Boosting %sabled.\n",
135
+		 cpumask_pr_args(policy->cpus), val ? "en" : "dis");
148136 
149137 	return 0;
150138 }
....@@ -175,7 +163,9 @@
175163 	if (ret || val > 1)
176164 		return -EINVAL;
177165 
178
-	set_boost(val);
166
+	get_online_cpus();
167
+	set_boost(policy, val);
168
+	put_online_cpus();
179169 
180170 	return count;
181171 }
....@@ -225,6 +215,8 @@
225215 
226216 	if (boot_cpu_data.x86_vendor == X86_VENDOR_AMD)
227217 		msr &= AMD_MSR_RANGE;
218
+	else if (boot_cpu_data.x86_vendor == X86_VENDOR_HYGON)
219
+		msr &= HYGON_MSR_RANGE;
228220 	else
229221 		msr &= INTEL_MSR_RANGE;
230222 
....@@ -253,7 +245,7 @@
253245 
254246 static u32 cpu_freq_read_intel(struct acpi_pct_register *not_used)
255247 {
256
-	u32 val, dummy;
248
+	u32 val, dummy __always_unused;
257249 
258250 	rdmsr(MSR_IA32_PERF_CTL, val, dummy);
259251 	return val;
....@@ -270,7 +262,7 @@
270262 
271263 static u32 cpu_freq_read_amd(struct acpi_pct_register *not_used)
272264 {
273
-	u32 val, dummy;
265
+	u32 val, dummy __always_unused;
274266 
275267 	rdmsr(MSR_AMD_PERF_CTL, val, dummy);
276268 	return val;
....@@ -361,7 +353,7 @@
361353 
362354 	val = drv_read(data, mask);
363355 
364
-	pr_debug("get_cur_val = %u\n", val);
356
+	pr_debug("%s = %u\n", __func__, val);
365357 
366358 	return val;
367359 }
....@@ -373,7 +365,7 @@
373365 	unsigned int freq;
374366 	unsigned int cached_freq;
375367 
376
-	pr_debug("get_cur_freq_on_cpu (%d)\n", cpu);
368
+	pr_debug("%s (%d)\n", __func__, cpu);
377369 
378370 	policy = cpufreq_cpu_get_raw(cpu);
379371 	if (unlikely(!policy))
....@@ -453,8 +445,7 @@
453445 	if (acpi_pstate_strict) {
454446 		if (!check_freqs(policy, mask,
455447 				 policy->freq_table[index].frequency)) {
456
-			pr_debug("acpi_cpufreq_target failed (%d)\n",
457
-				policy->cpu);
448
+			pr_debug("%s (%d)\n", __func__, policy->cpu);
458449 			result = -EAGAIN;
459450 		}
460451 	}
....@@ -568,7 +559,7 @@
568559 static int __init acpi_cpufreq_early_init(void)
569560 {
570561 	unsigned int i;
571
-	pr_debug("acpi_cpufreq_early_init\n");
562
+	pr_debug("%s\n", __func__);
572563 
573564 	acpi_perf_data = alloc_percpu(struct acpi_processor_performance);
574565 	if (!acpi_perf_data) {
....@@ -622,7 +613,7 @@
622613 static int acpi_cpufreq_blacklist(struct cpuinfo_x86 *c)
623614 {
624615 	/* Intel Xeon Processor 7100 Series Specification Update
625
-	 * http://www.intel.com/Assets/PDF/specupdate/314554.pdf
616
+	 * https://www.intel.com/Assets/PDF/specupdate/314554.pdf
626617 	 * AL30: A Machine Check Exception (MCE) Occurring during an
627618 	 * Enhanced Intel SpeedStep Technology Ratio Change May Cause
628619 	 * Both Processor Cores to Lock Up. */
....@@ -638,21 +629,58 @@
638629 }
639630 #endif
640631 
632
+#ifdef CONFIG_ACPI_CPPC_LIB
633
+static u64 get_max_boost_ratio(unsigned int cpu)
634
+{
635
+	struct cppc_perf_caps perf_caps;
636
+	u64 highest_perf, nominal_perf;
637
+	int ret;
638
+
639
+	if (acpi_pstate_strict)
640
+		return 0;
641
+
642
+	ret = cppc_get_perf_caps(cpu, &perf_caps);
643
+	if (ret) {
644
+		pr_debug("CPU%d: Unable to get performance capabilities (%d)\n",
645
+			 cpu, ret);
646
+		return 0;
647
+	}
648
+
649
+	highest_perf = perf_caps.highest_perf;
650
+	nominal_perf = perf_caps.nominal_perf;
651
+
652
+	if (!highest_perf || !nominal_perf) {
653
+		pr_debug("CPU%d: highest or nominal performance missing\n", cpu);
654
+		return 0;
655
+	}
656
+
657
+	if (highest_perf < nominal_perf) {
658
+		pr_debug("CPU%d: nominal performance above highest\n", cpu);
659
+		return 0;
660
+	}
661
+
662
+	return div_u64(highest_perf << SCHED_CAPACITY_SHIFT, nominal_perf);
663
+}
664
+#else
665
+static inline u64 get_max_boost_ratio(unsigned int cpu) { return 0; }
666
+#endif
667
+
641668 static int acpi_cpufreq_cpu_init(struct cpufreq_policy *policy)
642669 {
643
-	unsigned int i;
644
-	unsigned int valid_states = 0;
645
-	unsigned int cpu = policy->cpu;
646
-	struct acpi_cpufreq_data *data;
647
-	unsigned int result = 0;
648
-	struct cpuinfo_x86 *c = &cpu_data(policy->cpu);
649
-	struct acpi_processor_performance *perf;
650670 	struct cpufreq_frequency_table *freq_table;
671
+	struct acpi_processor_performance *perf;
672
+	struct acpi_cpufreq_data *data;
673
+	unsigned int cpu = policy->cpu;
674
+	struct cpuinfo_x86 *c = &cpu_data(cpu);
675
+	unsigned int valid_states = 0;
676
+	unsigned int result = 0;
677
+	u64 max_boost_ratio;
678
+	unsigned int i;
651679 #ifdef CONFIG_SMP
652680 	static int blacklisted;
653681 #endif
654682 
655
-	pr_debug("acpi_cpufreq_cpu_init\n");
683
+	pr_debug("%s\n", __func__);
656684 
657685 #ifdef CONFIG_SMP
658686 	if (blacklisted)
....@@ -795,6 +823,28 @@
795823 		valid_states++;
796824 	}
797825 	freq_table[valid_states].frequency = CPUFREQ_TABLE_END;
826
+
827
+	max_boost_ratio = get_max_boost_ratio(cpu);
828
+	if (max_boost_ratio) {
829
+		unsigned int freq = freq_table[0].frequency;
830
+
831
+		/*
832
+		 * Because the loop above sorts the freq_table entries in the
833
+		 * descending order, freq is the maximum frequency in the table.
834
+		 * Assume that it corresponds to the CPPC nominal frequency and
835
+		 * use it to set cpuinfo.max_freq.
836
+		 */
837
+		policy->cpuinfo.max_freq = freq * max_boost_ratio >> SCHED_CAPACITY_SHIFT;
838
+	} else {
839
+		/*
840
+		 * If the maximum "boost" frequency is unknown, ask the arch
841
+		 * scale-invariance code to use the "nominal" performance for
842
+		 * CPU utilization scaling so as to prevent the schedutil
843
+		 * governor from selecting inadequate CPU frequencies.
844
+		 */
845
+		arch_set_max_freq_ratio(true);
846
+	}
847
+
798848 	policy->freq_table = freq_table;
799849 	perf->state = 0;
800850 
....@@ -852,7 +902,7 @@
852902 {
853903 	struct acpi_cpufreq_data *data = policy->driver_data;
854904 
855
-	pr_debug("acpi_cpufreq_cpu_exit\n");
905
+	pr_debug("%s\n", __func__);
856906 
857907 	policy->fast_switch_possible = false;
858908 	policy->driver_data = NULL;
....@@ -868,8 +918,9 @@
868918 {
869919 	struct acpi_processor_performance *perf = per_cpu_ptr(acpi_perf_data,
870920 							      policy->cpu);
921
+	unsigned int freq = policy->freq_table[0].frequency;
871922 
872
-	if (perf->states[0].core_frequency * 1000 != policy->cpuinfo.max_freq)
923
+	if (perf->states[0].core_frequency * 1000 != freq)
873924 		pr_warn(FW_WARN "P-state 0 is not max freq\n");
874925 }
875926 
....@@ -877,7 +928,7 @@
877928 {
878929 	struct acpi_cpufreq_data *data = policy->driver_data;
879930 
880
-	pr_debug("acpi_cpufreq_resume\n");
931
+	pr_debug("%s\n", __func__);
881932 
882933 	data->resume = 1;
883934 
....@@ -950,7 +1001,7 @@
9501001 	if (cpufreq_get_current_driver())
9511002 		return -EEXIST;
9521003 
953
-	pr_debug("acpi_cpufreq_init\n");
1004
+	pr_debug("%s\n", __func__);
9541005 
9551006 	ret = acpi_cpufreq_early_init();
9561007 	if (ret)
....@@ -987,7 +1038,7 @@
9871038 
9881039 static void __exit acpi_cpufreq_exit(void)
9891040 {
990
-	pr_debug("acpi_cpufreq_exit\n");
1041
+	pr_debug("%s\n", __func__);
9911042 
9921043 	acpi_cpufreq_boost_exit();
9931044 
....@@ -1004,14 +1055,14 @@
10041055 late_initcall(acpi_cpufreq_init);
10051056 module_exit(acpi_cpufreq_exit);
10061057 
1007
-static const struct x86_cpu_id acpi_cpufreq_ids[] = {
1008
-	X86_FEATURE_MATCH(X86_FEATURE_ACPI),
1009
-	X86_FEATURE_MATCH(X86_FEATURE_HW_PSTATE),
1058
+static const struct x86_cpu_id __maybe_unused acpi_cpufreq_ids[] = {
1059
+	X86_MATCH_FEATURE(X86_FEATURE_ACPI, NULL),
1060
+	X86_MATCH_FEATURE(X86_FEATURE_HW_PSTATE, NULL),
10101061 	{}
10111062 };
10121063 MODULE_DEVICE_TABLE(x86cpu, acpi_cpufreq_ids);
10131064 
1014
-static const struct acpi_device_id processor_device_ids[] = {
1065
+static const struct acpi_device_id __maybe_unused processor_device_ids[] = {
10151066 	{ACPI_PROCESSOR_OBJECT_HID, },
10161067 	{ACPI_PROCESSOR_DEVICE_HID, },
10171068 	{},