RE: [Xen-devel] Latest xen-unstable on IBM x440

["Nakajima, Jun" <jun.nakajima@xxxxxxxxx>]

Keir Fraser wrote:
> On 4 May 2005, at 19:00, Nakajima, Jun wrote:
> 
>> As far as I remember, acpi=ht and acpi=off means different things.
>> What IBM x440 requires is "acpi=ht", which uses ACPI tables to get
>> logical CPUs (for HT), and uses MPS to get PCI interrupt routing
>> info. 
> 
> For interrupt routing, which is what breaks, I think it is equivalent
> to acpi=off. We've fixed quite a few issues with the patch already,
> but haven't yet dug into apic.c and io_apic.c -- I think those two
> are the key to successfully booting non-acpi. I don't think it will
> be that tricky either -- mostly a case of carefully adding back code
> that was removed because it isn't used when using ACPI for irq
> routing. 

My point is that it looks like the keyboard is broken now, and it has
nothing to do with ACPI (PCI interrupt routing) if it's PS/2. The plan
for acpi=off is to use PIC mode, which is not desirable for a server
like IBM x440.

Jun

> 
>   -- Keir


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