Re: Two questions about the MADT in ACPI table

[Hanjun Guo <hanjun.guo@linaro.org>]

On 2017/2/13 21:31, Dou Liyang wrote:
> Hi, Rafael, Lv
>
> May I ask for your help.
>
> Recently, I am very confused about the generation of the MADT
> in ACPI table.
>
> 1: Why we put all the Apic Ids which flag==1 in front of the
> one which flag==0 in MADT?
>
> Just like that:
>
> -----orginal-----------------MADT-------
> Apic Id    Enable Flag    Apic Id    Enable Flag
> 0x00    1        0x00    1
> 0x02    1        0x02    1
> 0x04    0        0x10    1
> 0x06    0        0x12    1
> 0x10    1        0x04    0
> 0x12    1        0x06    0
> 0x14    0        0x14    0
> 0x16    0        0x16    0
>
> If the flag is the same, It will not change the order.
>
> -----orginal-----------------MADT---------
> Apic Id    Enable Flag    Apic Id    Enable Flag
> 0x00    0        0x00    0
> 0x02    0        0x02    0
> 0x04    0        0x04    0
> 0x06    0        0x06    0
> 0x10    0        0x10    0
> 0x12    0        0x12    0
> 0x14    0        0x14    0
> 0x16    0        0x16    0

Sorry, a little bit confused, local APIC entries are listed in
MADT by firmware, and MADT is a static table which means the OS
will not update the orders.

>
>
> 2: If the order rule can be changed ?
> If it can be done, What should I do?

What's the issue you are facing? any problem here?

Thanks
Hanjun