[vfio-users] vfio pass through only works once after reboot - more tests

[Karsten Elfenbein]

Hi,

after my first tries in
http://lists.nongnu.org/archive/html/qemu-discuss/2015-09/msg00003.html
I did an other round of tests.

I made the GF460 the primary card and put the GF970 into vfio. With
that config the VM could start and use the card multiple times without
rebooting. (vfio is chowned to me)

The only bad output I get from qemu while running the gf970 in the VM is:
qemu-system-x86_64: vfio_pci_write_config(0000:06:00.0, 0x418,
0xe0000, 0x4) failed: Bad address

Then I switched back to the GF460 for the VM and get some more of these lines:
qemu-system-x86_64: vfio_pci_read_config(0000:03:00.0, 0x13c, 0x4)
failed: Bad address
qemu-system-x86_64: vfio_pci_write_config(0000:03:00.0, 0x13c,
0x3ffffff2, 0x4) failed: Bad address
qemu-system-x86_64: vfio_pci_read_config(0000:03:00.0, 0x150, 0x4)
failed: Bad address
qemu-system-x86_64: vfio_pci_write_config(0000:03:00.0, 0x150,
0xfffffff2, 0x4) failed: Bad address
qemu-system-x86_64: vfio_pci_write_config(0000:03:00.0, 0x48c,
0x118008c, 0x4) failed: Bad address
qemu-system-x86_64: vfio_pci_read_config(0000:03:00.0, 0x45c, 0x4)
failed: Bad address
qemu-system-x86_64: vfio_pci_write_config(0000:03:00.0, 0x45c,
0xfffffff2, 0x4) failed: Bad address
qemu-system-x86_64: vfio_pci_read_config(0000:03:00.0, 0x158, 0x4)
failed: Bad address
qemu-system-x86_64: vfio_pci_write_config(0000:03:00.0, 0x158,
0xfffffff2, 0x4) failed: Bad address
qemu-system-x86_64: vfio_pci_write_config(0000:03:00.0, 0x610, 0x5,
0x4) failed: Bad address
qemu-system-x86_64: vfio_pci_write_config(0000:03:00.0, 0x418,
0xe0000, 0x4) failed: Bad address
The second boot looks the same but the card does not bring a signal.
(not even the card bios comes up)

Installing the Nvidia driver with the GF460 crashed the Windows 10 VM
with more if these lines:
qemu-system-x86_64: vfio_pci_read_config(0000:03:00.0, 0x60c, 0x4)
failed: Bad address
qemu-system-x86_64: vfio_pci_read_config(0000:03:00.0, 0x610, 0x4)
failed: Bad address
qemu-system-x86_64: vfio_pci_read_config(0000:03:00.0, 0x138, 0x4)
failed: Bad address
qemu-system-x86_64: vfio_pci_write_config(0000:03:00.0, 0x138,
0xfffffff2, 0x4) failed: Bad address
qemu-system-x86_64: vfio_pci_read_config(0000:03:00.0, 0x460, 0x4)
failed: Bad address
qemu-system-x86_64: vfio_pci_read_config(0000:03:00.0, 0x460, 0x4)
failed: Bad address
qemu-system-x86_64: vfio_pci_read_config(0000:03:00.0, 0x150, 0x4)
failed: Bad address
qemu-system-x86_64: vfio_pci_read_config(0000:03:00.0, 0x18c, 0x4)
failed: Bad address
qemu-system-x86_64: vfio_pci_read_config(0000:03:00.0, 0x4a8, 0x4)
failed: Bad address
qemu-system-x86_64: vfio_pci_read_config(0000:03:00.0, 0x4a4, 0x4)
failed: Bad address
qemu-system-x86_64: vfio_pci_read_config(0000:03:00.0, 0x138, 0x4)
failed: Bad address
qemu-system-x86_64: vfio_pci_write_config(0000:03:00.0, 0x138,
0xf007fff2, 0x4) failed: Bad address
qemu-system-x86_64: vfio_pci_read_config(0000:03:00.0, 0x460, 0x4)
failed: Bad address
qemu-system-x86_64: vfio_pci_write_config(0000:03:00.0, 0x460,
0xfffffff2, 0x4) failed: Bad address
qemu-system-x86_64: vfio_pci_write_config(0000:03:00.0, 0x138,
0xfffffff2, 0x4) failed: Bad address
qemu-system-x86_64: vfio_pci_read_config(0000:03:00.0, 0x4a8, 0x4)
failed: Bad address
qemu-system-x86_64: vfio_pci_read_config(0000:03:00.0, 0x4a4, 0x4)
failed: Bad address
qemu-system-x86_64: vfio_pci_read_config(0000:03:00.0, 0x4a8, 0x4)
failed: Bad address
qemu-system-x86_64: vfio_pci_read_config(0000:03:00.0, 0x4a4, 0x4)
failed: Bad address
qemu-system-x86_64: vfio_pci_read_config(0000:03:00.0, 0x4a8, 0x4)
failed: Bad address


Just wondering if it is possible to get the card running or better to
just grab a GF950.

Thanks
Karsten