lkml.org 
[lkml]   [2012]   [Mar]   [20]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: 3.2.1 Unable to reset IRR messages on boot
On Tue, Mar 20, 2012 at 01:41:32PM -0700, Suresh Siddha wrote:
> On Tue, 2012-03-20 at 16:25 -0400, Konrad Rzeszutek Wilk wrote:
> > On Tue, Mar 20, 2012 at 01:05:19PM -0700, Suresh Siddha wrote:
> > > Also does the dom0 see all the GSI's/io-apic's that the host sees or is
> > > it going to be just one io-apic? I was just wondering if the reg 01 need
> > > to be same as what the host sees?
> >
> > It does not use the APIC mechanism at all. It only needs the GSI value
> > from the IOAPIC and LAPIC so that the ACPI can work.
>
> So the number of redirection entries in the io-apic need to be same as
> the original values then?

It can be up to sixteen and or up to whatever the INT_SRV_OVR has. With
the dummy mapping it was 0xff, which meant it had up to 255 which was more than
enough.
>
> > It could also at startup copy the original values and stick them in these copies.
> > That does mean using the memory allocator to allocate X copies for X IOAPICS. I
> > don't think the memory allocator is active at that stage since we using fixmaps.
> > Thoughts?
>
> You should be able to use alloc_bootmem friends.
>
> thanks,
> suresh
>


\
 
 \ /
  Last update: 2012-03-20 21:57    [W:0.079 / U:14.620 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site