Messages in this thread | | | Date | Tue, 20 Mar 2012 16:48:59 -0400 | From | Konrad Rzeszutek Wilk <> | Subject | Re: 3.2.1 Unable to reset IRR messages on boot |
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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 >
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