RE: [Xen-devel] Genapic

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

Puthiyaparambil, Aravindh wrote:
> I am a little confused here. When you say XenLinux I am assuming you
> are talking about the Linux user kernels which have Xen patches. Why
> would we even turn on the mach specific features in the user kernels?
> 
Xen assumes particular mach specific featurs, such as timer, memory
reporting, IRQ, interrutp handling, which don't necessarily work with
such mach specific features as found on real machines.

> I would think that that the mach specific code needs to reside in the
> Xen hypervisor itself. It at the moment has unified apic.c/io_apic.c
> for x86_32 and x86_64 platforms. Don't we to add genapic code in
> there? Or am I wrong on this? Maybe I need more coffee :-)
I talked about the generic platform support, not genapic per se. We have
moved ACPI, PCI, and part of io_apic (which required apic.c) handling to
dom0 to do better platform detection and configuration. Xen still owns
IO APICs, and some operatons must be done by Xen.  

Jun

> 
> Aravindh
> 

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