Re: [Xen-devel] [PATCH] xend: passthrough: add an option pci-passthrough-strict-check

[Simon Horman <horms@xxxxxxxxxxxx>]

On Mon, Sep 07, 2009 at 06:02:02PM +0800, Cui, Dexuan wrote:
> Currently when assigning device to HVM guest, we use the strict check for HVM
> guest by default.(For PV guest we use loose check automatically if necessary.)
> 
> When we assign device to HVM guest, if we meet with the co-assignment issues 
> or
> the ACS issue (see changeset 20081: 4a517458406f), we could try changing the
> option to 'no' -- however, we have to realize this may incur security issue 
> and
> we can't make sure the device assignment could really work properly even after
> we do this.
> 
> The option is located in /etc/xen/xend-config.sxp:
> (pci-passthrough-strict-check yes)

This sounds like it opens a can of worms to me.
I take it that you have equipment and a set-up in
mind that needs this.


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