Re: [PATCH v4 10/18] PCI: Account for ACS egress control in isolation checks
Jason Gunthorpe <[email protected]>
| Newsgroups | org.kernel.vger.linux-doc,dev.linux.lists.iommu,org.kernel.vger.linux-kernel,org.kernel.vger.linux-pci |
|---|---|
| Message-ID | <178761377056.3197084.2573998749847027711.b4-review@b4> |
> pci_acs_enabled() treats P2P Request Redirect as effective whenever its > control bit is set. PCIe r7.0, sec 6.12.3, table 6-11 lets an enabled > Egress Control Vector override it: a clear vector bit routes the request > directly. This may well all be correct, but I'd prefer not to touch grouping in this series working on p2pdma.. The grouping logic is already not doing a good job with the spec and we can't change it because it creates regression. -- Jason