On 26/11/2018 13:48, Quentin Perret wrote:
> On Monday 26 Nov 2018 at 13:20:43 (+0100), Daniel Lezcano wrote:
>> diff --git a/drivers/base/arch_topology.c b/drivers/base/arch_topology.c
>> index fd5325b..e0c5b60 100644
>> --- a/drivers/base/arch_topology.c
>> +++ b/drivers/base/arch_topology.c
>> @@ -243,9 +243,20 @@ static int __init register_cpufreq_notifier(void)
>> * until we have the necessary code to parse the cpu capacity, so
>> * skip registering cpufreq notifier.
>> */
>> - if (!acpi_disabled || !raw_capacity)
>> + if (!acpi_disabled)
>> return -EINVAL;
>>
>> + if (!raw_capacity) {
>> +
>> + pr_info("cpu_capacity: No capacity defined in DT, set default "
>> + "values to %ld\n", SCHED_CAPACITY_SCALE);
>> +
>> + raw_capacity = kmalloc_array(num_possible_cpus(),
>> + sizeof(*raw_capacity), GFP_KERNEL);
>> + if (!raw_capacity)
>> + return -ENOMEM;
>> + }
>> +
>> if (!alloc_cpumask_var(&cpus_to_visit, GFP_KERNEL)) {
>> pr_err("cpu_capacity: failed to allocate memory for
>> cpus_to_visit\n");
>> return -ENOMEM;
>
> I just tried on my Juno by removing the capacity-dmips-mhz values from
> the DT and got the following:
>
> $ cat /sys/devices/system/cpu/cpufreq/policy*/scaling_available_frequencies
> 450000 575000 700000 775000 850000
> 450000 625000 800000 950000 1100000
> $ cat /sys/devices/system/cpu/cpu*/cpu_capacity
> 791
> 1024
> 1024
> 791
> 791
> 791
>
> Same thing with a partially-filled DT (which is the expected behaviour
> now). So feel free to add:
>
> Tested-by: Quentin Perret <quentin.per...@arm.com>
Thanks for testing!
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