Re: [Qemu-devel] [PATCH 00/13] IOMMU: Enable interrupt remapping for Intel IOMMU

[Jan Kiszka]

On 2016-02-19 12:39, Peter Xu wrote:
> On Fri, Feb 19, 2016 at 11:15:06AM +0100, Jan Kiszka wrote:
>> On 2016-02-19 10:58, Paolo Bonzini wrote:
>>> I think you're not verifying the SVT, SID and SQ fields in the IRTE.
>>
>> Exactly.
>>
>>>
>>> The source ID can be passed to the IOMMU using the MemTxAttrs mechanism.
>>
>> Ah, that's a nice new channel, resolving the need for using/passing
>> source-specific target memory regions for this. At least for PCI
>> devices, it should already be populated with the required information,
>> others (IOAPIC, HPET) probably require additional work to pass what I
>> defined as Q35_PSEUDO_BUS_PLATFORM, Q35_PSEUDO_DEVFN_IOAPIC/HPET.
> 
> Jan, Rita, Paolo, 
> 
> One more thing to ask: do we have any plan to move on the work to
> support vhost/pass-through devices? Do you think we need these too?

We need them eventually as well, but - unless some of them just work by
chance (unlikely) - that was not in the scope if the ongoing project,
rather a potential add-on for later.

Jan

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