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authorRafael J. Wysocki2017-03-22 23:52:18 +0100
committerRafael J. Wysocki2017-03-24 03:04:31 +0100
commiteb5139d1a2272487b223c4879ecd2a1b48c2250e (patch)
tree2f578c921bc42f8bcb6bf29643e61ab4b8726ef2 /drivers/cpufreq
parentf1a91645b7f0896a12f91b57e1c6492fe137f85b (diff)
cpufreq: intel_pstate: Support HWP processors in all operation modes
Currently, some processors supporting HWP are only supported by intel_pstate if HWP is actually going to be used and not supported otherwise which is confusing. Specifically, they are not supported if "intel_pstate=no_hwp" is passed to the kernel in the command line or if the driver is started in the passive mode ("intel_pstate=passive"). There is no real reason for that, because everything about those processor is known anyway and the driver can work with them in all modes, so make that happen, but use the load-based P-state selection algorithm for the active mode "powersave" policy with them. Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/cpufreq')
-rw-r--r--drivers/cpufreq/intel_pstate.c33
1 files changed, 19 insertions, 14 deletions
diff --git a/drivers/cpufreq/intel_pstate.c b/drivers/cpufreq/intel_pstate.c
index 815f5577b32a..87725e2ac3ac 100644
--- a/drivers/cpufreq/intel_pstate.c
+++ b/drivers/cpufreq/intel_pstate.c
@@ -2627,28 +2627,33 @@ static const struct x86_cpu_id hwp_support_ids[] __initconst = {
static int __init intel_pstate_init(void)
{
- const struct x86_cpu_id *id;
- struct cpu_defaults *cpu_def;
- int rc = 0;
+ int rc;
if (no_load)
return -ENODEV;
- if (x86_match_cpu(hwp_support_ids) && !no_hwp) {
+ if (x86_match_cpu(hwp_support_ids)) {
copy_cpu_funcs(&core_params.funcs);
- hwp_active++;
- intel_pstate.attr = hwp_cpufreq_attrs;
- goto hwp_cpu_matched;
- }
+ if (no_hwp) {
+ pstate_funcs.get_target_pstate = get_target_pstate_use_cpu_load;
+ } else {
+ hwp_active++;
+ intel_pstate.attr = hwp_cpufreq_attrs;
+ goto hwp_cpu_matched;
+ }
+ } else {
+ const struct x86_cpu_id *id;
+ struct cpu_defaults *cpu_def;
- id = x86_match_cpu(intel_pstate_cpu_ids);
- if (!id)
- return -ENODEV;
+ id = x86_match_cpu(intel_pstate_cpu_ids);
+ if (!id)
+ return -ENODEV;
- cpu_def = (struct cpu_defaults *)id->driver_data;
+ cpu_def = (struct cpu_defaults *)id->driver_data;
- copy_pid_params(&cpu_def->pid_policy);
- copy_cpu_funcs(&cpu_def->funcs);
+ copy_pid_params(&cpu_def->pid_policy);
+ copy_cpu_funcs(&cpu_def->funcs);
+ }
if (intel_pstate_msrs_not_valid())
return -ENODEV;