Re: [Xen-users] iommu bios bugs

[David Sutton <kantras@xxxxxxxxx>]

Jacek,

On Sun, Jun 9, 2013 at 11:39 AM, jacek burghardt <jaceksburghardt@xxxxxxxxx> wrote:

I have 890FXA=GD65

I attempted to boot 3.9.5 kernel and latest xen-4.3

I get [      0.028164] [Firmware Bug]: AMD-Vi: IOAPIC[24] not in IVRS table

[      0.028170] [Firmware Bug]: AMD-Vi: No southbridge IOAPIC found in IVRS table
[      0.028174] AMD-Vi: Disabling interrupt remapping due to BIOS bug(s)

and xen

(XEN) AMD Fam10h machine check reporting enabled

(XEN) PCI: MCFG configuration 0: base e0000000 segment 0000 buses 00 - ff

(XEN) PCI: Not using MCFG for segment 0000 bus 00-ff

(XEN) IVHD Error: no information for IO-APIC 0x6

(XEN) AMD-Vi: Error initialization

(XEN) I/O virtualisation disabled

(XEN) ENABLING IO-APIC IRQs

Any patches to work around this I found this  patch for kernel https://bbs.archlinux.org/viewtopic.php?pid=1278191

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Suggestion: If you try using google, with the search string: "site:lists.xen.org/archives/html/xen-users ivrs iommu io-apic hack" (or something similar) then you will find the thread on the xen-users list where this particular issue was being discussed. Someone posted a hack for xen-4.2.2 to work around the bios error ( http://lists.xen.org/archives/html/xen-users/2013-05/msg00579.html ) Note: since this is a hack, and it is basically changing some code which was implemented for a security advisory, it's most likely not going to be supported by anyone and you are responsible for any issues which may occur. Having said that, I have that patch used on one of my systems (Sabertooth 990FX rev 1.0) and its been working well, but this is also my own personal machine behind a firewall.

Regards,

  David

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