On Sun, May 8, 2016 at 7:24 PM, Damon Namod <m...@damon.at> wrote: > Hi Okky, > > thanks for you response! > > Passing the card to a Linux (Ubuntu 15.04) guest fails with the same > message: > > qemu-system-x86_64: vfio_dma_map(0x5613dc154610, 0xfeb90000, > 0x2000, 0x7f7976a09000) = -14 (Bad address) > qemu: hardware error: vfio: DMA mapping failed, unable to continue > > The M1015 is already flashed to IT mode and I have disable bios boot > support to circumvent the issue you described. I already switched the PCIe > slot but the symptoms are the same. Actually it's an interesting thought > that it might have something to do with the controller itself. Any more > thoughts on this? Could be the Xeon E3-1200 and the laking ACS support be > an issue (I don't think so though)? Could be a different machine type than > `pc` help? > > I also tried the latest GIT version of `qemu-system-x86_64` but the error > message remains the same. Is there any way to get some more details about > the error? `dmesg` isn't much of a help as it doesn't contain any messages > regarding my problem. The only error message I got is found inside > `/var/log/libvirt/qemu/`... >
I don't know what you've got going on here. The closest thing I've got is this: 02:00.0 Serial Attached SCSI controller [0107]: LSI Logic / Symbios Logic SAS2308 PCI-Express Fusion-MPT SAS-2 [1000:0086] (rev 05) SeaBIOS isn't too fond of it with the ROM enabled (hangs for a while after SeaBIOS version string[1]), but if I run it with rombar=0, it seems pretty happy, certainly no mapping faults. Can you try just a very simple VM, something like: sudo qemu-system-x86_64 -enable-kvm -m 2G -net none -monitor stdio -serial none -parallel none -vnc :1 -device vfio-pci,host=1:00.0,rombar=0 -S -cdrom Fedora-Live-Cinnamon-x86_64-23-10.iso (or whatever ISO image you like that you can boot up and poke around in the VM a bit) This will start in paused mode to a (qemu) prompt on the terminal. Use 'c' to continue execution. Connect VNC to display :1, minding firewalls if you're connecting from another system. What's the host kernel version? Can you try something newer? Thanks, Alex [1] Oh, it actually did boot eventually and executed the HBA option ROM, just took a minute or two.
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