Re: [PATCH 1/1] x86/AMD: Fix setup ssss:bb:dd:f for d0 failed

[Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>]

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On 8/30/2013 3:09 AM, Jan Beulich wrote:
>> Sorry for didn't get a chance to follow up with this sooner.  Ok, I see
>> >the code you mentioned.
>> >However, if I understand this correctly, it is also mapping the bridge
>> >to the domU
>> >along with the end-device.  This is not the same as what you mentioned
>> >that the bridge should
>> >be mapped to only Dom0.
> I don't think I ever said this. Whether we're talking about DomU or
> Dom0 here is irrelevant. I'm just pointing out that bridges do get
> mappings established for them whenever a device behind them gets
> mapped.
>
> Jan
Ok, I think Iunderstand it a bit more now. I'll modify the code to skip 
only the hostbridge when they are not
specifiedin the IVRS as it is not needed to be mapped to adomain.  I'll 
send out the code shortly.

However, I also found out that the current AMD IOMMU driver maps other 
type of bridges
(i.e. DEV_TYPE_PCIe_BRIDGE, DEV_TYPE_PCIe2PCI_BRIDGE, and 
DEV_TYPE_LEGACY_PCI_BRIDGE) _only_ to Dom0,
and they won't get reassignedwhen the end point devices downstreamare 
assignedto other domain.
I don't think this is correct.I'll work on this and and send out a 
separate patch for this.

Thank you,

Suravee


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