Commit 5e9ab267 authored by Linus Torvalds's avatar Linus Torvalds
Browse files

Merge tag 'pm-6.12-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm 

Pull power management fixes from Rafael Wysocki:
 "These fix two issues in the amd-pstate cpufreq driver and update the
  intel_rapl power capping driver with a new processor ID.

  Specifics:

   - Enable ACPI CPPC in amd_pstate_register_driver() after disabling it
     in amd_pstate_unregister_driver() when switching driver operation
     modes (Dhananjay Ugwekar)

   - Make amd-pstate use nominal performance as the maximum performance
     level when boost is disabled (Mario Limonciello)

   - Add ArrowLake-H to the list of processors where PL4 is supported in
     the MSR part of the intel_rapl power capping driver (Srinivas
     Pandruvada)"

* tag 'pm-6.12-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  powercap: intel_rapl_msr: Add PL4 support for ArrowLake-H
  cpufreq/amd-pstate: Use nominal perf for limits when boost is disabled
  cpufreq/amd-pstate: Fix amd_pstate mode switch on shared memory systems
parents 3b3a0ef6 cf8679bb

drivers/cpufreq/amd-pstate.c

+24 −6
Original line number Diff line number Diff line
@@ -536,11 +536,16 @@ static int amd_pstate_verify(struct cpufreq_policy_data *policy) 


static int amd_pstate_update_min_max_limit(struct cpufreq_policy *policy)

{

	u32 max_limit_perf, min_limit_perf, lowest_perf;

	u32 max_limit_perf, min_limit_perf, lowest_perf, max_perf;

	struct amd_cpudata *cpudata = policy->driver_data;



	max_limit_perf = div_u64(policy->max * cpudata->highest_perf, cpudata->max_freq);

	min_limit_perf = div_u64(policy->min * cpudata->highest_perf, cpudata->max_freq);

	if (cpudata->boost_supported && !policy->boost_enabled)

		max_perf = READ_ONCE(cpudata->nominal_perf);

	else

		max_perf = READ_ONCE(cpudata->highest_perf);



	max_limit_perf = div_u64(policy->max * max_perf, policy->cpuinfo.max_freq);

	min_limit_perf = div_u64(policy->min * max_perf, policy->cpuinfo.max_freq);



	lowest_perf = READ_ONCE(cpudata->lowest_perf);

	if (min_limit_perf < lowest_perf)
@@ -1201,11 +1206,21 @@ static int amd_pstate_register_driver(int mode) 
		return -EINVAL;



	cppc_state = mode;



	ret = amd_pstate_enable(true);

	if (ret) {

		pr_err("failed to enable cppc during amd-pstate driver registration, return %d\n",

		       ret);

		amd_pstate_driver_cleanup();

		return ret;

	}



	ret = cpufreq_register_driver(current_pstate_driver);

	if (ret) {

		amd_pstate_driver_cleanup();

		return ret;

	}



	return 0;

}
@@ -1496,10 +1511,13 @@ static int amd_pstate_epp_update_limit(struct cpufreq_policy *policy) 
	u64 value;

	s16 epp;



	if (cpudata->boost_supported && !policy->boost_enabled)

		max_perf = READ_ONCE(cpudata->nominal_perf);

	else

		max_perf = READ_ONCE(cpudata->highest_perf);

	min_perf = READ_ONCE(cpudata->lowest_perf);

	max_limit_perf = div_u64(policy->max * cpudata->highest_perf, cpudata->max_freq);

	min_limit_perf = div_u64(policy->min * cpudata->highest_perf, cpudata->max_freq);

	max_limit_perf = div_u64(policy->max * max_perf, policy->cpuinfo.max_freq);

	min_limit_perf = div_u64(policy->min * max_perf, policy->cpuinfo.max_freq);



	if (min_limit_perf < min_perf)

		min_limit_perf = min_perf;

drivers/powercap/intel_rapl_msr.c

+1 −0
Original line number Diff line number Diff line
@@ -148,6 +148,7 @@ static const struct x86_cpu_id pl4_support_ids[] = { 
	X86_MATCH_VFM(INTEL_METEORLAKE, NULL),

	X86_MATCH_VFM(INTEL_METEORLAKE_L, NULL),

	X86_MATCH_VFM(INTEL_ARROWLAKE_U, NULL),

	X86_MATCH_VFM(INTEL_ARROWLAKE_H, NULL),

	{}

};