RE: [Xen-devel] Memory mapping for PEG/PCIe Graphics Passthrough to <any> DomU

["Han, Weidong" <weidong.han@xxxxxxxxx>]

Fantu,

 

Can you try with the attached patch? and pls post the output of “lspci –v”?

 

Regards,

Weidong

 

From: xen-devel-bounces@xxxxxxxxxxxxxxxxxxx [mailto:xen-devel-bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of Weidong Han
Sent: Friday, January 08, 2010 10:46 AM
To: Pasi Kärkkäinen
Cc: xen-devel@xxxxxxxxxxxxxxxxxxx; Fantu
Subject: Re: [Xen-devel] Memory mapping for PEG/PCIe Graphics Passthrough to <any> DomU

 

Pasi Kärkkäinen wrote:

On Thu, Jan 07, 2010 at 08:14:47AM -0800, Fantu wrote:

i have grub2 also here and i have add dummy=foo before root...

xm dmesg

])

(XEN) [VT-D]dmar.c:548: Host address width 39

(XEN) [VT-D]dmar.c:557: found ACPI_DMAR_DRHD:

(XEN) [VT-D]dmar.c:374:   dmaru->address = fbfff000

(XEN) [VT-D]dmar.c:326:   endpoint: 0:1b.0

(XEN) [VT-D]dmar.c:557: found ACPI_DMAR_DRHD:

(XEN) [VT-D]dmar.c:374:   dmaru->address = fbffe000

(XEN) [VT-D]dmar.c:331:   IOAPIC: f0:1f.7

(XEN) [VT-D]dmar.c:331:   IOAPIC: 0:13.0

(XEN) [VT-D]dmar.c:386:   flags: INCLUDE_ALL

(XEN) [VT-D]dmar.c:561: found ACPI_DMAR_RMRR:

(XEN) [VT-D]dmar.c:446:   RMRR region: base_addr ec000 end_address effff

(XEN) [VT-D]dmar.c:326:   endpoint: 0:1d.0

(XEN) [VT-D]dmar.c:326:   endpoint: 0:1d.1

(XEN) [VT-D]dmar.c:326:   endpoint: 0:1d.2

(XEN) [VT-D]dmar.c:326:   endpoint: 0:1d.7

(XEN) [VT-D]dmar.c:326:   endpoint: 0:1a.0

(XEN) [VT-D]dmar.c:326:   endpoint: 0:1a.1

(XEN) [VT-D]dmar.c:326:   endpoint: 0:1a.2

(XEN) [VT-D]dmar.c:326:   endpoint: 0:1a.7

(XEN) [VT-D]dmar.c:561: found ACPI_DMAR_RMRR:

(XEN) [VT-D]dmar.c:417: RMRR error: base_addr bf7dc000 end_address bf7dbfff

(XEN) Failed to parse ACPI DMAR.  Disabling VT-d.

This looks like you have a buggy BIOS, it doesn't have correct DMAR RMRR table..

When RMRR address range is not in reserved memory (BIOS issue), can use

'iommu_inclusive_mapping=1' to work around it. 

So try that options for xen.gz in grub config.

http://wiki.xensource.com/xenwiki/VTdHowTo

yes, obviously the RMRR is setting incorrectly in BIOS. The base address shouldn't be greater than end address. "iommu_inclusive_mapping=1" cannot help here. You should report this issue to the vendor and ask for a correct BIOS.

Regards,
Weidong

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fix-rmrr.patch
Description: fix-rmrr.patch

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