Re: [PATCH v4 14/18] PCI/P2PDMA: Extract pure ACS routing decision helpers

Logan 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 <[email protected]> 

On 2026-08-21 13:38, Leon Romanovsky wrote:
> From: Leon Romanovsky <[email protected]>
> 
> The ACS routing decision and Egress Control Vector size calculation are
> mixed with config-space I/O, which makes their branch-heavy behavior
> difficult to exercise independently.
> 
> Extract pci_acs_p2pdma_decision() with explicit Request or Completion type,
> target availability, and vector state inputs. Extract
> pci_acs_egress_port_valid() for the encoded vector-size boundary. Keep
> config access in their callers and expose only the pure helpers under
> CONFIG_KUNIT.
> 
> Tested-by: Tushar Dave <[email protected]>
> Signed-off-by: Leon Romanovsky <[email protected]>

Makes sense:

Reviewed-by: Logan Gunthorpe <[email protected]>
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