Re: [PATCH 13/13] PCI: Add KUnit coverage for ACS isolation checks
Logan Gunthorpe <[email protected]>
| Newsgroups | org.kernel.vger.linux-kernel,org.kernel.vger.linux-doc,org.kernel.vger.linux-pci |
|---|---|
| Message-ID | <[email protected]> |
On 2026-08-02 09:09, Leon Romanovsky wrote: > From: Leon Romanovsky <[email protected]> > > Direct Translated P2P and Egress Control both let a peer request reach > the peer without Request Redirect, and whether Request Redirect still > isolates depends further on Translation Blocking and on the flags the > caller requests. Firmware owns these bits, so the combinations are not > reachable on a given machine. > > Drive pci_acs_flags_enabled() with a fake pci_ops supplying the ACS > Control register and check each combination. The function is exposed > under CONFIG_KUNIT via VISIBLE_IF_KUNIT. > > Signed-off-by: Leon Romanovsky <[email protected]> > Assisted-by: Claude Opus 5 <[email protected]> Reviewed-by: Logan Gunthorpe <[email protected]>