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Wed, 6 May 2026 03:03:56 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: virtualization@FreeBSD.org Subject: [Bug 292895] Reproducible ARM64/bhyve panic on CIX/Cortex-A720 platforms Date: Wed, 06 May 2026 03:03:56 +0000 X-Bugzilla-Reason: AssignedTo X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: Base System X-Bugzilla-Component: bhyve X-Bugzilla-Version: 15.0-STABLE X-Bugzilla-Keywords: X-Bugzilla-Severity: Affects Some People X-Bugzilla-Who: editor@callfortesting.org X-Bugzilla-Status: New X-Bugzilla-Resolution: X-Bugzilla-Priority: --- X-Bugzilla-Assigned-To: virtualization@FreeBSD.org X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: 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: Discussion List-Archive: https://lists.freebsd.org/archives/freebsd-virtualization List-Help: List-Post: List-Subscribe: List-Unsubscribe: X-BeenThere: freebsd-virtualization@freebsd.org Sender: owner-freebsd-virtualization@FreeBSD.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D292895 --- Comment #16 from Michael Dexter --- Giving that fix a try: devmem2 will build on FreeBSD, only throwing a few errors. This dd(1) command should be equivalent to the read operation of devmem2 as called by smmu-evtq-fix.sh: dd if=3D/dev/mem bs=3D1 skip=3D$((0x0b010020)) count=3D4 | hexdump -C However, the read causes a panic on 16.0-CURRENT on a MS-R1 and the Orange = Pi 6+, which share the same CPU: panic: pmap_map_io_transient: TODO: Map out of DMAP data cpuid =3D 9 time =3D 1778010919 KDB: stack backtrace: db_trace_self() at db_trace_self db_trace_self_wrapper() at db_trace_self_wrapper+0x38 vpanic() at vpanic+0x1b8 panic() at panic+0x48 pmap_map_io_transient() at pmap_map_io_transient+0x184 uiomove_fromphys() at uiomove_fromphys+0x158 memrw() at memrw+0x1a8 devfs_read_f() at devfs_read_f+0xf8 dofileread() at dofileread+0x74 kern_readv() at kern_readv+0x4c sys_read() at sys_read+0xc0 do_el0_sync() at do_el0_sync+0x600 handle_el0_sync() at handle_el0_sync+0x4c --- exception, esr 0x56000000 KDB: enter: panic This happens with or without vmm.ko loaded. --=20 You are receiving this mail because: You are the assignee for the bug.=