[Expired for QEMU because there has been no activity for 60 days.]
** Changed in: qemu
Status: Incomplete => Expired
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https://bugs.launchpad.net/bugs/1731347
Title:
VFIO Passthrough of SAS2008-based HBA card fails on E3-1225v3 due to
failed DMA mapping (-14)
Status in QEMU:
Expired
Bug description:
There is a bug preventing multiple people with my combination of
hardware from using PCI passthrough. I am not actually sure whether
the bug is in kernel/kvm, vfio or qemu, however, as qemu is the
highest-level of these, I am reporting the bug here as you will likely
know better where the origin of the bug may be found.
When attempting to pass through this device to a KVM using VFIO, this
results in error -14 (Bad Address):
# qemu-system-x86_64 -enable-kvm -m 10G -net none -monitor stdio -serial
# none -parallel none -vnc :1 -device vfio-pci,host=1:00.0 -S
QEMU 2.9.1 monitor - type 'help' for more information
(qemu) c
(qemu) qemu-system-x86_64: VFIO_MAP_DMA: -14
qemu-system-x86_64: vfio_dma_map(0x7f548f0a1fc0, 0xfebd0000, 0x2000,
0x7f54a909d000) = -14 (Bad address)
qemu: hardware error: vfio: DMA mapping failed, unable to continue
See also:
https://bugzilla.proxmox.com/show_bug.cgi?id=1556
https://www.redhat.com/archives/vfio-users/2016-May/msg00088.html
This has occurred on Proxmox (Proxmox and Debian packages, Ubuntu kernel),
Ubuntu,
and pure Debian packages and kernel on Proxmox. However, this error
reportedly does NOT occur for:
- different distributions(!) (Fedora 24, 25)
- different HBA cards (SAS2308, SAS3008)
- different CPU (E3-1220v5)
I would be thankful for any input and I'll be happy to provide any
further info necessary. This is my first time delving this deep into
anything close to the kernel.
Thanks and best regards,
Johannes Falke
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