diff options
author | Linus Torvalds | 2019-05-15 08:46:44 -0700 |
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committer | Linus Torvalds | 2019-05-15 08:46:44 -0700 |
commit | bfbfbf7368627860dd769567599d73ad8f6d8191 (patch) | |
tree | 0db55522cfa41fa95fa236c7074753dfc6c7e2e8 /arch/x86/kernel | |
parent | 88f76bc31b93cc228f5a43d5b565dc53615970ae (diff) | |
parent | 2a8d69f6139b605b2e36c80540cb8e8da2d016be (diff) |
Merge tag 'pm-5.2-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull more power management updates from Rafael Wysocki:
"These fix a recent regression causing kernels built with CONFIG_PM
unset to crash on systems that support the Performance and Energy Bias
Hint (EPB), clean up the cpufreq core and some users of transition
notifiers and introduce a new power domain flag into the generic power
domains framework (genpd).
Specifics:
- Fix recent regression causing kernels built with CONFIG_PM unset to
crash on systems that support the Performance and Energy Bias Hint
(EPB) by avoiding to compile the EPB-related code depending on
CONFIG_PM when it is unset (Rafael Wysocki).
- Clean up the transition notifier invocation code in the cpufreq
core and change some users of cpufreq transition notifiers
accordingly (Viresh Kumar).
- Change MAINTAINERS to cover the schedutil governor as part of
cpufreq (Viresh Kumar).
- Simplify cpufreq_init_policy() to avoid redundant computations (Yue
Hu).
- Add explanatory comment to the cpufreq core (Rafael Wysocki).
- Introduce a new flag, GENPD_FLAG_RPM_ALWAYS_ON, to the generic
power domains (genpd) framework along with the first user of it
(Leonard Crestez)"
* tag 'pm-5.2-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
soc: imx: gpc: Use GENPD_FLAG_RPM_ALWAYS_ON for ERR009619
PM / Domains: Add GENPD_FLAG_RPM_ALWAYS_ON flag
cpufreq: Update MAINTAINERS to include schedutil governor
cpufreq: Don't find governor for setpolicy drivers in cpufreq_init_policy()
cpufreq: Explain the kobject_put() in cpufreq_policy_alloc()
cpufreq: Call transition notifier only once for each policy
x86: intel_epb: Take CONFIG_PM into account
Diffstat (limited to 'arch/x86/kernel')
-rw-r--r-- | arch/x86/kernel/cpu/intel_epb.c | 22 | ||||
-rw-r--r-- | arch/x86/kernel/tsc.c | 2 |
2 files changed, 22 insertions, 2 deletions
diff --git a/arch/x86/kernel/cpu/intel_epb.c b/arch/x86/kernel/cpu/intel_epb.c index f4dd73396f28..ebb14a26f117 100644 --- a/arch/x86/kernel/cpu/intel_epb.c +++ b/arch/x86/kernel/cpu/intel_epb.c @@ -97,6 +97,7 @@ static void intel_epb_restore(void) wrmsrl(MSR_IA32_ENERGY_PERF_BIAS, (epb & ~EPB_MASK) | val); } +#ifdef CONFIG_PM static struct syscore_ops intel_epb_syscore_ops = { .suspend = intel_epb_save, .resume = intel_epb_restore, @@ -193,6 +194,25 @@ static int intel_epb_offline(unsigned int cpu) return 0; } +static inline void register_intel_ebp_syscore_ops(void) +{ + register_syscore_ops(&intel_epb_syscore_ops); +} +#else /* !CONFIG_PM */ +static int intel_epb_online(unsigned int cpu) +{ + intel_epb_restore(); + return 0; +} + +static int intel_epb_offline(unsigned int cpu) +{ + return intel_epb_save(); +} + +static inline void register_intel_ebp_syscore_ops(void) {} +#endif + static __init int intel_epb_init(void) { int ret; @@ -206,7 +226,7 @@ static __init int intel_epb_init(void) if (ret < 0) goto err_out_online; - register_syscore_ops(&intel_epb_syscore_ops); + register_intel_ebp_syscore_ops(); return 0; err_out_online: diff --git a/arch/x86/kernel/tsc.c b/arch/x86/kernel/tsc.c index 15b5e98a86f9..356dfc555a27 100644 --- a/arch/x86/kernel/tsc.c +++ b/arch/x86/kernel/tsc.c @@ -979,7 +979,7 @@ static int time_cpufreq_notifier(struct notifier_block *nb, unsigned long val, if (!(freq->flags & CPUFREQ_CONST_LOOPS)) mark_tsc_unstable("cpufreq changes"); - set_cyc2ns_scale(tsc_khz, freq->cpu, rdtsc()); + set_cyc2ns_scale(tsc_khz, freq->policy->cpu, rdtsc()); } return 0; |