Re: [PATCH v3 00/12] arm64: Add HOTPLUG_PARALLEL support for secondary CPUs

[Jinjie Ruan]

On 6/29/2026 12:04 PM, Shrikanth Hegde wrote:
> 
> 
> On 6/24/26 2:55 PM, Jinjie Ruan wrote:
>> Support for parallel secondary CPU bringup is already utilized by x86,
>> MIPS, and RISC-V. This patch brings this capability to the arm64
>> architecture.
>>
>> Introduce CONFIG_HOTPLUG_PARALLEL_SMT to avoid primary SMT threads
>> to boot first constraint.
>>
>> And add a 'cpu' parameter to update_cpu_boot_status() to allow updating
>> the boot status at a per-CPU granularity during parallel bringup.
>>
>> Rework the global `secondary_data` and `__early_cpu_boot_status` accessed
>> during early boot into per-CPU arrays to allow secondary CPUs to boot
>> in parallel.
>>
> 
> Shouldn't this be called CONFIG_BRINGUP_PARALLEL instead?
> Hotplug usually means disable/enable CPU at runtime.

According to my understanding, the parallelism here includes CPU bringup
and hotplug.