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Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , David Christensen , netdev@vger.kernel.org (open list:PENSANDO ETHERNET DRIVERS), linux-kernel@vger.kernel.org (open list) Subject: [PATCH net-next v2] ionic: advertise 52-bit addressing limitation for MSI-X Date: Mon, 3 Jun 2024 17:27:41 -0400 Message-ID: <20240603212747.1079134-1-drc@linux.ibm.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240530214026.774256-1-drc@linux.ibm.com> References: <20240530214026.774256-1-drc@linux.ibm.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-TM-AS-GCONF: 00 X-Proofpoint-GUID: Cmtwd-_6opUdRXMsHcHFevFRVV6SKc1b X-Proofpoint-ORIG-GUID: dMg9qzWn0gWnPL_IrE_FJbqkg08Gr8_h X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1039,Hydra:6.0.650,FMLib:17.12.28.16 definitions=2024-06-03_17,2024-05-30_01,2024-05-17_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 mlxscore=0 malwarescore=0 bulkscore=0 lowpriorityscore=0 mlxlogscore=889 spamscore=0 suspectscore=0 impostorscore=0 phishscore=0 clxscore=1015 priorityscore=1501 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2405010000 definitions=main-2406030173 Content-Type: text/plain; charset="utf-8" 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 Reviewed-by: Shannon Nelson --- v2: Limit change to ppc64 systems as suggested --- drivers/net/ethernet/pensando/ionic/ionic_bus_pci.c | 5 +++++ 1 file changed, 5 insertions(+) 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 str= uct pci_device_id *ent) goto err_out; } =20 +#ifdef CONFIG_PPC64 + /* Ensure MSI/MSI-X interrupts lie within addressable physical memory */ + pdev->no_64bit_msi =3D 1; +#endif + err =3D ionic_setup_one(ionic); if (err) goto err_out; --=20 2.43.0