Date: Sun, 07 Aug 2022 20:54:38 +0000 From: bugzilla-noreply@freebsd.org To: bugs@FreeBSD.org Subject: [Bug 265700] DMA initialization failed causes instantaneous kernel panic when source llvm > 14.0.4 Message-ID: <bug-265700-227@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D265700 Bug ID: 265700 Summary: DMA initialization failed causes instantaneous kernel panic when source llvm > 14.0.4 Product: Base System Version: 13.1-STABLE Hardware: powerpc OS: Any Status: New Severity: Affects Some People Priority: --- Component: kern Assignee: bugs@FreeBSD.org Reporter: bugreporter@firemail.cc Hardware: Raptor Computing Talos II, 128GB RAM, etc. This is a big-endian targetted: so, not powerpc64le. With install media built from sources on the stable/13 branch between the import of llvm-14.0.5 (so, 862668c4874d8ffb8d74108a55719670c8b923b6) and ti= p, which for me is currently f95569fafcba5ed3cd119f8d177622fe0e64bbf6, on kern= el boot I get an insta-panic when the kernel attempts to initialize DMA for an AHCI channel. Rebuilding (cross-rebuilding I guess) back to commitid 3fbe3365df59f9b973c7b5bc8e82e13199ab5057 allows the DMA initialize to compl= ete. I am booting the install media from a USB stick; there are a larger number = of storage devices in this system. The console reports, during this crash: ahci0: AHCI v1.00 with 4 6Gbps ports, Port Multiplier supported with FBS ahcich0: <AHCI channel> at channel 0 on ahci0 ahcich0: WARNING - DMA initialization failed, error 12 fatal kernel trap: exception =3D 0x300 (data storage interrupt) virtual address =3D 0x4f dsisr =3D 0x40000000 srr0 =3D 0xc000000003030d50 (0xd40d50) srr1 =3D 0x9000000000001032 current msr =3D 0x9000000000001032 lr =3D 0xc000000003030d48 (0xd40d48) frame =3D 0xc00800000000bf20 curthread =3D 0xc000000003a6f480 pid =3D 0, comm =3D swapper panic: data storage interrupt trap cpuid =3D 0 time =3D 1 KDB: stack backtrace: #0 0xc000000002bdc4f0 at kdb_backtrace+0x90 #1 0xc000000002b6c148 at vpanic+0x1b8 #2 0xc000000002b6bf7c at panic+0x44 #3 0xc000000003044dc0 at trap+0x304 #4 0xc0000000030390f4 at powerpc_interrupt+0x1b4 Uptime: 1s (and then instantly reboots) If I build from mainline again which I think has LLVM 15.* imported, it's b= ack to working again at least in terms of booting. If there are any debugging mechanisms you'd like me to pursue, I have a bit= of time on my hands and I'm motivated to get powerpc64 (not le) running on my talos. --=20 You are receiving this mail because: You are the assignee for the bug.=
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