[LinuxBIOS] Help with meaning of config options.
marc.jones at amd.com
Tue Dec 4 19:01:37 CET 2007
Steve Isaacs wrote:
> On Tue, 2007-12-04 at 10:18 -0700, Marc Jones wrote:
>> CONFIG_MAX_CPUS : Saves space in the ACPI tables and additional stack
>> space for maximum possible number of cores in the system. Might be
>> better named as CONFIG_MAX_CPUs_CORES (AMD only)
>> CONFIG_MAX_PHYSICAL_CPUS: Used to set memory SPD addresses and in
>> coherent HyperTransport initialization (AMD only)
>> CONFIG_LOGICAL_CPUS : This is the flag to build in multi-core support.
>> Similar to CONFIG_MAX_CPUS but only set to 0 or 1. (Used by AMD and
>> Intel code)
>> Your setup:
>> CONFIG_MAX_CPUS : 4 - 4 cores
>> CONFIG_MAX_PHYSICAL_CPUS: 2 - 2 CPUs
>> CONFIG_LOGICAL_CPUS : 1 - build multi core support in.
> I'm not suggesting a change. I'm just trying to make sure I understand
> the semantics.
> So, would it make sense to think of it as having an option that defines
> the number of cores per CPU (e.g. CONFIG_CORES_PER_CPU) and let
> CONFIG_MAX_CPUS equal CONFIG_MAX_PHYSICAL_CPUS * CONFIG_CORES_PER_CPU?
I would ack that patch.
Senior Firmware Engineer
(970) 226-9684 Office
mailto:Marc.Jones at amd.com
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