Messages in this thread | | | Date | Wed, 17 Aug 2022 19:48:53 -0300 | From | Jason Gunthorpe <> | Subject | Re: [PATCH v11 04/13] PCI: Allow PASID only when ACS enforced on upstreaming path |
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On Wed, Aug 17, 2022 at 04:17:43PM -0500, Bjorn Helgaas wrote:
> Does the PCIe spec really allow TLPs with PASID to be routed anywhere > except upstream?
I think yes:
2.2.10.2 End-End TLP Prefix Processing:
The presence of an End-End TLP Prefix does not alter the routing of a TLP. TLPs are routed based on the routing rules covered in Section 2.2.4 .
Which I read as saying that routing is done after stripping all the prefixes. PASID is a prefix.
Lu, you may want to quote the spec in the commit message to make it clear.
A strange choice in my opinion, but there it is..
Jason
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