RE: [Xen-devel] [PATCH][RFC] Support more Capability Structures andDevice Specific

[Ian Jackson <Ian.Jackson@xxxxxxxxxxxxx>]

Dong, Eddie writes ("RE: [Xen-devel] [PATCH][RFC] Support more Capability 
Structures andDevice Specific"):
> If we agree the basic policy is pass through except the ones with known
> behavior, I think we don't need that many case to case handle. Dexuan is
> working on the implementation base on the summit talk and close to end,
> maybe Yuji and Dexuan can coordinate first to see if the proposed policy
> can server yuji's purpose.

Is it really safe to pass through operations with unknown behavious ?
Particularly if the system has an iommu, the administrator may be
expecting the passthrough mechanism to defend the host from rogue
behaviour by the card and its owning guest.

(I'm no expert on PCI so forgive me if this question is stupid.)

Ian.

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