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SubjectRe: [PATCH] x86: let MPS support selectable
On Thu, Jun 19, 2008 at 8:10 AM, Maciej W. Rozycki <macro@linux-mips.org> wrote:
> On Thu, 19 Jun 2008, Yinghai Lu wrote:
>
>> @@ -233,6 +233,19 @@ config SMP
>>
>> If you don't know what to do here, say N.
>>
>> +config X86_FIND_SMP_CONFIG
>> + def_bool y
>> + depends on X86_MPPARSE || X86_VOYAGER || X86_VISWS
>> + depends on X86_32
>> +
>> +config X86_MPPARSE
>> + def_bool y
>> + bool "Enable MPS table"
>> + depends on (X86_32 && (X86_LOCAL_APIC && !X86_VISWS)) || X86_64
>> + help
>> + For old smp systems that do not have proper acpi support. Newer systems
>> + (esp with 64bit cpus) with acpi support, MADT and DSDT will override it
>> +
>> choice
>> prompt "Subarchitecture Type"
>> default X86_PC
>
> First of all you want to make sure at least one of ACPI and X86_MPPARSE
> is enabled if X86_LOCAL_APIC or you risk a known-broken kernel
> configuration, e.g. SMP which has no slightest chance to work.
>
> Personally I'd be happy to see CONFIG_ACPI_BOOT we used to have at one
> point back just so that you can use ACPI tables to run an SMP system
> without the need to pull all the power management stuff. Useful if the MP
> table is broken beyond recovery. I am assuming it has been removed for a
> reason though.

thanks. will try to add CONFIG_ACPI_BOOT...

YH


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