Re: [Xen-devel] VT-d HowTo Update

[Simon Horman <horms@xxxxxxxxxxxx>]

On Tue, Apr 21, 2009 at 11:08:39AM +0100, Espen Skoglund wrote:
> You may also want to mention the various boot time parameters (or at
> least some of them).  The following comment is snipped from
> xen/drivers/passthrough/iommu.c.
> 
>       eSk
> 
> /*
>  * The 'iommu' parameter enables the IOMMU.  Optional comma separated
>  * value may contain:
>  *
>  *   off|no|false|disable       Disable IOMMU (default)
>  *   pv                         Enable IOMMU for PV domains
>  *   no-pv                      Disable IOMMU for PV domains (default)
>  *   force|required             Don't boot unless IOMMU is enabled
>  *   passthrough                Enable VT-d DMA passthrough (no DMA
>  *                              translation for Dom0)
>  *   no-snoop                   Disable VT-d Snoop Control
>  *   no-qinval                  Disable VT-d Queued Invalidation
>  *   no-intremap                Disable VT-d Interrupt Remapping
>  */

Thanks, that is a good point. Though to be honest I'm not
entirely sure what the last 3 options do.

-- 
Simon Horman
  VA Linux Systems Japan K.K. Satellite Lab in Sydney, Australia
  H: www.vergenet.net/~horms/            W: www.valinux.co.jp/en


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