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RE: [Xen-devel] [vt-d][xen4-rc6] Hangs on startup

To: Keir Fraser <Keir.Fraser@xxxxxxxxxxxxx>, Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>, Łukasz Oleś <lukaszoles@xxxxxxxxx>
Subject: RE: [Xen-devel] [vt-d][xen4-rc6] Hangs on startup
From: Ross Philipson <Ross.Philipson@xxxxxxxxxx>
Date: Wed, 17 Mar 2010 08:46:43 -0400
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Thread-topic: [Xen-devel] [vt-d][xen4-rc6] Hangs on startup
Actually I think I ran into this once before. Someone sent me a screen shot of 
their e820 mappings from the actual BIOS setup program clearly showing the 
memory range was reserved yet the check that generated the message below was 
triggered. I could not reproduce it but I think I tracked it down to changes 
that xen was making to the e820 mappings in sanitize_e820_map() (that is IIRC, 
it was a year ago or more).


-----Original Message-----
From: xen-devel-bounces@xxxxxxxxxxxxxxxxxxx 
[mailto:xen-devel-bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of Keir Fraser
Sent: Wednesday, March 17, 2010 4:22 AM
To: Konrad Rzeszutek Wilk; Łukasz Oleś 
Cc: xen-devel@xxxxxxxxxxxxxxxxxxx
Subject: Re: [Xen-devel] [vt-d][xen4-rc6] Hangs on startup

On 16/3/10 23:55, "Konrad Rzeszutek Wilk" <konrad.wilk@xxxxxxxxxx> wrote:

> On Wed, Mar 17, 2010 at 12:41:50AM +0100, Łukasz Oleś wrote:
>> Hi,
>> I'm trying to run xen4-rc6 with iommu=1 option, but it hangs during the
>> startup.
> .. snip ..
>> (XEN) [VT-D]dmar.c:481:   RMRR address range not in reserved memory
>> base = bdc00000 end = ffffffffbfffffff; iommu_inclusive_mapping=1
>> parameter may be needed.
> Did you try that?

Actually iommu_inclusive_mapping=1 is the default now. The above warning
appears to print even when iommu_inclusive_mapping is set. :-)

 -- Keir

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