lkml.org 
[lkml]   [2009]   [Jun]   [27]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH 8/9] x86/apic: match destination id with destination mode

* Eric W. Biederman <ebiederm@xmission.com> wrote:

> Ingo Molnar <mingo@elte.hu> writes:
>
> > The question here is whether this should layer on top of
> > Jeremy's IO-APIC driverization patches. I think it should.
>
> The patch is a bad hack that is totally misdocumented. A bit like
> the Xen apic changes in that respect.
>
> I haven't seen Jeremy's IO-APIC driverization patches.
>
> I am stumped why we need any driverization in this area. x86_64
> and has had for years a mechanism that is perfectly fine for
> abstracting this. i386 also has had something similar and last I
> looked we just about had that code merged.

We have the local apic abstracted out into struct apic on both
32-bit and 64-bit, but not the IO-APIC methods.

> Xen doesn't have ioapics so it doesn't need us faking writes to
> ioapics. Xen either needs to parse the ioapic tables itself or
> Xen needs a proper interface to be given the table information.
>
> I this patch can be replaced by a 2 line change to the apic mode
> logic to force us into physflat mode on moorestown.

Yes, probably. I havent looked deeply into all the merits yet, there
were so many other structural problems with these patches.

Ingo


\
 
 \ /
  Last update: 2009-06-27 19:05    [W:0.044 / U:0.320 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site