On Tue, Jun 23, 2015 at 02:57:51PM -0600, Tom Schutter wrote: > I installed 5.7 from > http://ftp3.usa.openbsd.org/pub/OpenBSD/5.7/amd64/install57.iso > in a Windows Server 2012 R2 Hyper-V VM using the "Legacy Network > Adapter". I always get a kernel panic in the de(4) driver during boot. > If I remove the legacy NIC from the VM config, then I successfully > boot, but obviously with no network access.
I looked into this last year but lost interest. It seems like the DMA buffer is being placed past the UVM constraint for DMA ( eg > 4GB). I'm not sure why that's happening, I only spent a day or so looking at it before I got bored and moved on to something else. A side note - the same config on hyperV seems to work on i386, but I noticed some strange clock skewing using that config so I gave up on that also. Another side note - disabling de(4) in config and letting the kernel fall back to dc(4) gets past this particular panic but doesn't allow any traffic to pass. -ml > > What additional information can I provide to help with diagnosis and > create a proper bug report? > > >> OpenBSD/amd64 BOOT 3.28 > ... > wsdisplay0 at vga1 mux 1: console (80x25, vt100 emulation) > wsdisplay0: screen 1-5 added (80x25, vt100 emulation) > de0 at pci0 dev 10 function 0 "DEC 21140" rev 0x20panic: Non dma-reachable > buffer at curaddr 0x107762b70(raw) > Stopped at Debugger+0x9: leave > Debugger() at Debugger+0x9 > panic() at panic+0xfe > _bus_dmamap_load_buffer() at _bus_dmamap_load_buffer+0x1b6 > _bus_dmamap_load() at _bus_dmamap_load+0x7f > tulip_busdma_init() at tulip_busdma_init+0xa0 > tulip_attach() at tulip_attach+0x2a4 > config_attach() at config_attach+0x1bc > pci_probe_device() at pci_probe_device+0x467 > pci_enumerate_bus() at pci_enumerate_bus+0xe9 > config_attach() at config_attach+0x1bc > end trace frame: 0xffffffff81a28e60, count: 0 > RUN AT LEAST 'trace' AND 'ps' AND INCLUDE OUTPUT WHEN REPORTING THIS PANIC! > DO NOT EVEN BOTHER REPORTING THIS WITHOUT INCLUDING THAT INFORMATION! > ddb> trace > Debugger() at Debugger+0x9 > panic() at panic+0xfe > _bus_dmamap_load_buffer() at _bus_dmamap_load_buffer+0x1b6 > _bus_dmamap_load() at _bus_dmamap_load+0x7f > tulip_busdma_init() at tulip_busdma_init+0xa0 > tulip_attach() at tulip_attach+0x2a4 > config_attach() at config_attach+0x1bc > pci_probe_device() at pci_probe_device+0x467 > pci_enumerate_bus() at pci_enumerate_bus+0xe9 > config_attach() at config_attach+0x1bc > cpu_configure() at cpu_configure+0x1b > main() at main+0x3df > end trace frame: 0x0, count: -14 > ddb> ps > PID PPID PGRP UID S FLAGS WAIT COMMAND > * 0 -1 0 0 7 0x10200 swapper > > -- > Tom Schutter
