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Sat, 21 Jun 2025 19:48:59 GMT (envelope-from bugzilla-noreply@freebsd.org) X-Authentication-Warning: kenobi.freebsd.org: www set sender to bugzilla-noreply@freebsd.org using -f From: bugzilla-noreply@freebsd.org To: net@FreeBSD.org Subject: [Bug 287492] Unable to detect NIC cards on few PCIe Gen5 slots on Dell R770 servers where x2APIC mode is enabled Date: Sat, 21 Jun 2025 19:48:56 +0000 X-Bugzilla-Reason: AssignedTo X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: Base System X-Bugzilla-Component: kern X-Bugzilla-Version: 15.0-CURRENT X-Bugzilla-Keywords: vendor X-Bugzilla-Severity: Affects Some People X-Bugzilla-Who: jhb@FreeBSD.org X-Bugzilla-Status: New X-Bugzilla-Resolution: X-Bugzilla-Priority: --- X-Bugzilla-Assigned-To: net@FreeBSD.org X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: cc Message-ID: In-Reply-To: References: Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="UTF-8" X-Bugzilla-URL: https://bugs.freebsd.org/bugzilla/ Auto-Submitted: auto-generated List-Id: Networking and TCP/IP with FreeBSD List-Archive: https://lists.freebsd.org/archives/freebsd-net List-Help: List-Post: List-Subscribe: List-Unsubscribe: Sender: owner-freebsd-net@FreeBSD.org MIME-Version: 1.0 https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D287492 John Baldwin changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |kib@FreeBSD.org --- Comment #3 from John Baldwin --- The issue is that for this system we need to support it's I/O MMU that is u= sed to remap APIC IDs used in I/O APIC and MSI interrupts so that the interrupt message uses an APIC ID < 255, but it after it is remapped by the I/O MMU it ends up using a "real" APIC ID that can be larger. There are separate I/O MMU drivers for Intel systems (DMAR) vs AMD. 14.2 should have support for DMAR, but I believe only 15.0 has support for AMD's= I/O MMU (and I'm not fully certain if interrupt remapping is enabled by default= for AMD in 15.0). Can you confirm which CPU vendor you are using? --=20 You are receiving this mail because: You are the assignee for the bug.=