Re: [Xen-devel] Xen 4.2.1 boot failure with IOMMU enabled

[Boris Ostrovsky <boris.ostrovsky@xxxxxxxxxx>]

----- povder@xxxxxxxxx wrote:

> 
> GRUB entry:
>  title CentOS Xen kernel IOMMU serial console (3.7.1-3.el6xen.x86_64)
>         root (hd0,0)
>         kernel /xen.gz dom0_mem=1G,max:1G dom0_max_vcpus=1
> dom0_vcpus_pin iommu=verbose loglvl=all guest_loglvl=all iommu=1
> com1=38400,8n1 console=com1

Try adding "iommu=debug" option --- it will print more information including 
dump of the ACPI table that describes IOMMU.

-boris


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