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Date: Wed, 26 May 2021 17:01:04 +0200
From: "Rafael J. Wysocki" <rjw@...ysocki.net>
To: Linux PM <linux-pm@...r.kernel.org>
Cc: LKML <linux-kernel@...r.kernel.org>,
Srinivas Pandruvada <srinivas.pandruvada@...ux.intel.com>,
Chen Yu <yu.c.chen@...el.com>,
Randy Dunlap <rdunlap@...radead.org>
Subject: [PATCH] cpufreq: intel_pstate: hybrid: Fix build with CONFIG_ACPI unset
From: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
One of the previous commits introducing hybrid processor support to
intel_pstate broke build with CONFIG_ACPI unset.
Fix that and while at it fix up empty stubs of two functions related
to ACPI CPPC.
Fixes: eb3693f0521e ("cpufreq: intel_pstate: hybrid: CPU-specific scaling factor")
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
---
drivers/cpufreq/intel_pstate.c | 97 +++++++++++++++++++++--------------------
1 file changed, 50 insertions(+), 47 deletions(-)
Index: linux-pm/drivers/cpufreq/intel_pstate.c
===================================================================
--- linux-pm.orig/drivers/cpufreq/intel_pstate.c
+++ linux-pm/drivers/cpufreq/intel_pstate.c
@@ -385,9 +385,14 @@ static int intel_pstate_get_cppc_gurante
}
#else /* CONFIG_ACPI_CPPC_LIB */
-static void intel_pstate_set_itmt_prio(int cpu)
+static inline void intel_pstate_set_itmt_prio(int cpu)
{
}
+
+static inline int intel_pstate_get_cppc_guranteed(int cpu)
+{
+ return -ENOTSUPP;
+}
#endif /* CONFIG_ACPI_CPPC_LIB */
static void intel_pstate_init_acpi_perf_limits(struct cpufreq_policy *policy)
@@ -470,27 +475,6 @@ static void intel_pstate_exit_perf_limit
acpi_processor_unregister_performance(policy->cpu);
}
-#else /* CONFIG_ACPI */
-static inline void intel_pstate_init_acpi_perf_limits(struct cpufreq_policy *policy)
-{
-}
-
-static inline void intel_pstate_exit_perf_limits(struct cpufreq_policy *policy)
-{
-}
-
-static inline bool intel_pstate_acpi_pm_profile_server(void)
-{
- return false;
-}
-#endif /* CONFIG_ACPI */
-
-#ifndef CONFIG_ACPI_CPPC_LIB
-static int intel_pstate_get_cppc_guranteed(int cpu)
-{
- return -ENOTSUPP;
-}
-#endif /* CONFIG_ACPI_CPPC_LIB */
static bool intel_pstate_cppc_perf_valid(u32 perf, struct cppc_perf_caps *caps)
{
@@ -505,6 +489,20 @@ static bool intel_pstate_cppc_perf_caps(
return caps->highest_perf && caps->lowest_perf <= caps->highest_perf;
}
+#else /* CONFIG_ACPI */
+static inline void intel_pstate_init_acpi_perf_limits(struct cpufreq_policy *policy)
+{
+}
+
+static inline void intel_pstate_exit_perf_limits(struct cpufreq_policy *policy)
+{
+}
+
+static inline bool intel_pstate_acpi_pm_profile_server(void)
+{
+ return false;
+}
+#endif /* CONFIG_ACPI */
static void intel_pstate_hybrid_hwp_perf_ctl_parity(struct cpudata *cpu)
{
@@ -530,7 +528,6 @@ static void intel_pstate_hybrid_hwp_perf
*/
static void intel_pstate_hybrid_hwp_calibrate(struct cpudata *cpu)
{
- struct cppc_perf_caps caps;
int perf_ctl_max_phys = cpu->pstate.max_pstate_physical;
int perf_ctl_scaling = cpu->pstate.perf_ctl_scaling;
int perf_ctl_turbo = pstate_funcs.get_turbo();
@@ -548,33 +545,39 @@ static void intel_pstate_hybrid_hwp_cali
pr_debug("CPU%d: HWP_CAP guaranteed = %d\n", cpu->cpu, cpu->pstate.max_pstate);
pr_debug("CPU%d: HWP_CAP highest = %d\n", cpu->cpu, cpu->pstate.turbo_pstate);
- if (intel_pstate_cppc_perf_caps(cpu, &caps)) {
- if (intel_pstate_cppc_perf_valid(caps.nominal_perf, &caps)) {
- pr_debug("CPU%d: Using CPPC nominal\n", cpu->cpu);
-
- /*
- * If the CPPC nominal performance is valid, it can be
- * assumed to correspond to cpu_khz.
- */
- if (caps.nominal_perf == perf_ctl_max_phys) {
- intel_pstate_hybrid_hwp_perf_ctl_parity(cpu);
- return;
- }
- scaling = DIV_ROUND_UP(cpu_khz, caps.nominal_perf);
- } else if (intel_pstate_cppc_perf_valid(caps.guaranteed_perf, &caps)) {
- pr_debug("CPU%d: Using CPPC guaranteed\n", cpu->cpu);
-
- /*
- * If the CPPC guaranteed performance is valid, it can
- * be assumed to correspond to max_freq.
- */
- if (caps.guaranteed_perf == perf_ctl_max) {
- intel_pstate_hybrid_hwp_perf_ctl_parity(cpu);
- return;
+#ifdef CONFIG_ACPI
+ if (IS_ENABLED(CONFIG_ACPI_CPPC_LIB)) {
+ struct cppc_perf_caps caps;
+
+ if (intel_pstate_cppc_perf_caps(cpu, &caps)) {
+ if (intel_pstate_cppc_perf_valid(caps.nominal_perf, &caps)) {
+ pr_debug("CPU%d: Using CPPC nominal\n", cpu->cpu);
+
+ /*
+ * If the CPPC nominal performance is valid, it
+ * can be assumed to correspond to cpu_khz.
+ */
+ if (caps.nominal_perf == perf_ctl_max_phys) {
+ intel_pstate_hybrid_hwp_perf_ctl_parity(cpu);
+ return;
+ }
+ scaling = DIV_ROUND_UP(cpu_khz, caps.nominal_perf);
+ } else if (intel_pstate_cppc_perf_valid(caps.guaranteed_perf, &caps)) {
+ pr_debug("CPU%d: Using CPPC guaranteed\n", cpu->cpu);
+
+ /*
+ * If the CPPC guaranteed performance is valid,
+ * it can be assumed to correspond to max_freq.
+ */
+ if (caps.guaranteed_perf == perf_ctl_max) {
+ intel_pstate_hybrid_hwp_perf_ctl_parity(cpu);
+ return;
+ }
+ scaling = DIV_ROUND_UP(max_freq, caps.guaranteed_perf);
}
- scaling = DIV_ROUND_UP(max_freq, caps.guaranteed_perf);
}
}
+#endif
/*
* If using the CPPC data to compute the HWP-to-frequency scaling factor
* doesn't work, use the HWP_CAP gauranteed perf for this purpose with
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