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Re: [Xen-devel] [BUG] After upgrade to Xen 4.12.0 iommu=no-igfx


  • To: Roman Shaposhnik <roman@xxxxxxxxxx>
  • From: Jan Beulich <JBeulich@xxxxxxxx>
  • Date: Wed, 24 Jul 2019 12:04:21 +0000
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  • Cc: Juergen Gross <JGross@xxxxxxxx>, Andrew Cooper <andrew.cooper3@xxxxxxxxxx>, Paul Durrant <Paul.Durrant@xxxxxxxxxx>, "xen-devel@xxxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxxx>, "boris.ostrovsky@xxxxxxxxxx" <boris.ostrovsky@xxxxxxxxxx>, Roger Pau Monné <roger.pau@xxxxxxxxxx>
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  • Thread-topic: [Xen-devel] [BUG] After upgrade to Xen 4.12.0 iommu=no-igfx

On 24.07.2019 14:00, Jan Beulich wrote:
> On 23.07.2019 19:58, Roman Shaposhnik wrote:
>> No worries. Take a look at the head of the log attached.
> 
> One more thing for you to tweak to make the log even more useful:
> As per
> 
> (XEN) Xen version 4.12.0 (@) (gcc (Alpine 6.4.0) 6.4.0) debug=n  Tue Jul 23 
> 17:15:48 UTC 2019
> 
> this is a non-debug build. If you used a debug one, there ought to
> be another confirming message next to
> 
> (XEN) [VT-D]found ACPI_DMAR_RMRR:
> (XEN) [VT-D]  RMRR address range 8d800000..8fffffff not in reserved memory; 
> need "iommu_inclusive_mapping=1"?
> (XEN) [VT-D] endpoint: 0000:00:02.0
> 
> plus others in case of errors beyond the memory map related one
> (which, as was pointed out already, is a warning only). In case
> you're interested, see register_one_rmrr() in particular.

Oh, additionally you want to add "loglvl=all" to your hypervisor
command line.

Jan
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