Xen devel - Feb 2011 - [PATCH] amd iommu: Fix a xen crash after pci-attach

Keir,
pci-detach triggers IO page table deallocation if the last passthru device has 
been removed from pdev list, and this will result a BUG on amd systems for 
next pci-attach. This patch fixes this issue.
Thanks,
Wei

Signed-off-by: Wei Wang <wei.wang2@amd.com>
--
Advanced Micro Devices GmbH
Sitz: Dornach, Gemeinde Aschheim, 
Landkreis München Registergericht München, 
HRB Nr. 43632
WEEE-Reg-Nr: DE 12919551
Geschäftsführer:
Alberto Bozzo, Andrew Bowd


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On Tuesday 01 February 2011 17:27:16 Wei Wang2 wrote:
> Keir,
> pci-detach triggers IO page table deallocation if the last passthru device
> has been removed from pdev list, and this will result a BUG on amd systems
> for next pci-attach. This patch fixes this issue.
> Thanks,
> Wei
>
> Signed-off-by: Wei Wang <wei.wang2@amd.com>
> --
> Advanced Micro Devices GmbH
> Sitz: Dornach, Gemeinde Aschheim,
> Landkreis München Registergericht München,
> HRB Nr. 43632
> WEEE-Reg-Nr: DE 12919551
> Geschäftsführer:
> Alberto Bozzo, Andrew Bowd
Keir, 
I think this should also be back ported to 4.0, I found the same issue with 
xen-4.0.2-rc2-pre. Patch has been attached.
Thanks,
Wei
Signed-off-by: Wei Wang <wei.wang2@amd.com>


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