Hi,
you'd want to compare the lsmod and lspci output of the case that worked, you
said "If I bring up the guest using a generic image (not the kvm specific
kernal) the interface appears for SRIOV VF".
Now in this guest I'd expect the following section:
00:06.0 Ethernet controller: Intel Corporation Ethernet Virtual Function 700
Series (rev 02)
Subsystem: Intel Corporation Ethernet Virtual Function 700 Series
Physical Slot: 6
Flags: fast devsel
Memory at fe000000 (64-bit, prefetchable) [size=64K]
Memory at fe018000 (64-bit, prefetchable) [size=16K]
Capabilities: [70] MSI-X: Enable- Count=5 Masked-
Capabilities: [a0] Express Endpoint, MSI 00
To also have
Kernel driver in use: ?????
Finding which driver exactly that is would be step one.
I think for the card that I see here that would be "i40evf", but please confirm
that to be sure.
Now (still on the working environment) check where you have that module from
$ modinfo i40evf
filename:
/lib/modules/5.4.0-42-generic/kernel/drivers/net/ethernet/intel/iavf/iavf.ko
...
$ dpkg -S
/lib/modules/5.4.0-42-generic/kernel/drivers/net/ethernet/intel/iavf/iavf.ko
linux-modules-5.4.0-42-generic:
/lib/modules/5.4.0-42-generic/kernel/drivers/net/ethernet/intel/iavf/iavf.ko
So in my case I have confirmed that I
a) have the module installed
b) which package it is from
Now switch to your bad environment.
Check modinfo there, does the module exist (I'd assume it isn't).
In that case is the "linux-modules-5.4.0-42-generic" (or whatever matches your
case) package installed - if not why is that since the dependencies should have
pulled it in?
I hope this already helps to resolve, looking forward to hear back from
you.
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https://bugs.launchpad.net/bugs/1892422
Title:
Pci passthrough interface not showing up in Ubuntu 20.04 but does show
in 18.04
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