Re: 256 apic id for amd64

[Andi Kleen]

On Tue, Jan 11, 2005 at 09:44:07AM -0800, Yinghai Lu wrote:
> Actually It seems the Opteron System with Nvidia chip set can lift the bsp
> (core0/node0) to 0x10, and the jiffies is still changing in for CPU0. I try
> to enable the 8259 PIC in SB, it will cause the jiffies not changing.
> At the same time in the AMD 8111 SB MB, the 8259 PIC is default enabled, So
> after I lift the APIC id, it will stop jiffies. The problem is after I
> disable the 8259 in amd8111, it will cause other booting problem. maybe the
> io-apic is not enabled properly.

There is code that assumes all legacy interrupts (that includes the timer)
are routed to IO-APIC #0.  I still didn't get quite why you want to 
change that anyways. 

-Andi
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