diff options
| author | Pranjal Shrivastava <praan@google.com> | 2026-06-15 23:50:34 +0000 |
|---|---|---|
| committer | Joerg Roedel <joerg.roedel@amd.com> | 2026-07-09 10:11:02 +0200 |
| commit | 4f2cd6091ac41566a7300f5a4590d20a99aaa8bc (patch) | |
| tree | 3386119415a2b2fb6a424884bb8405daaff93993 /drivers | |
| parent | 8cdeaa50eae8dad34885515f62559ee83e7e8dda (diff) | |
PCI/ATS: Ensure pci_ats_supported() is PF-aware for VFs
Update pci_ats_supported() to additionally check the associated PF's
status when called on a VF. This ensures that PF-level quirks and
untrusted status are correctly propagated to VFs, providing a robust
support check that aligns with the kernel's PF-centric ATS configuration
model and is immune to the timing of VF-specific fixups.
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Reviewed-by: Samiullah Khawaja <skhawaja@google.com>
Reviewed-by: Nicolin Chen <nicolinc@nvidia.com>
Reviewed-by: Lu Baolu <baolu.lu@linux.intel.com>
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
Signed-off-by: Pranjal Shrivastava <praan@google.com>
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/pci/ats.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/drivers/pci/ats.c b/drivers/pci/ats.c index 96efa00d9743..679a3c3c1d54 100644 --- a/drivers/pci/ats.c +++ b/drivers/pci/ats.c @@ -40,10 +40,13 @@ void pci_ats_init(struct pci_dev *dev) */ bool pci_ats_supported(struct pci_dev *dev) { - if (!dev->ats_cap) + if (!dev->ats_cap || dev->untrusted) return false; - return (dev->untrusted == 0); + if (dev->is_virtfn) + return pci_ats_supported(pci_physfn(dev)); + + return true; } EXPORT_SYMBOL_GPL(pci_ats_supported); |