diff options
| author | David Christensen <drc@linux.ibm.com> | 2024-06-03 17:27:41 -0400 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2024-06-05 15:53:22 -0700 |
| commit | 1467713eb2244a54c99028a2eacd44f2d1badaf7 (patch) | |
| tree | 6aaf658ba1f61e5841c5be91eb7387ccb30ddd97 | |
| parent | c790275b5edf5d8280ae520bda7c1f37da460c00 (diff) | |
ionic: advertise 52-bit addressing limitation for MSI-X
Current ionic devices only support 52 internal physical address
lines. This is sufficient for x86_64 systems which have similar
limitations but does not apply to all other architectures,
notably IBM POWER (ppc64). To ensure that MSI/MSI-X vectors are
not set outside the physical address limits of the NIC, set the
no_64bit_msi value of the pci_dev structure during device probe.
Signed-off-by: David Christensen <drc@linux.ibm.com>
Reviewed-by: Shannon Nelson <shannon.nelson@amd.com>
Link: https://lore.kernel.org/r/20240603212747.1079134-1-drc@linux.ibm.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
| -rw-r--r-- | drivers/net/ethernet/pensando/ionic/ionic_bus_pci.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/net/ethernet/pensando/ionic/ionic_bus_pci.c b/drivers/net/ethernet/pensando/ionic/ionic_bus_pci.c index 6ba8d4aca0a0..a7146d50f814 100644 --- a/drivers/net/ethernet/pensando/ionic/ionic_bus_pci.c +++ b/drivers/net/ethernet/pensando/ionic/ionic_bus_pci.c @@ -326,6 +326,11 @@ static int ionic_probe(struct pci_dev *pdev, const struct pci_device_id *ent) goto err_out; } +#ifdef CONFIG_PPC64 + /* Ensure MSI/MSI-X interrupts lie within addressable physical memory */ + pdev->no_64bit_msi = 1; +#endif + err = ionic_setup_one(ionic); if (err) goto err_out; |