82599 VF trigger master abort

[idata]

Hi experts,

I am working on 82599ES in Linux Host and FreeBSD Guest.

But an error happened when PF detected one VF is bad(say VF PCI status is PCI_STATUS_REC_MASTER_ABORT),

it would issue a VF FLR. Then the VF in Guest can not triger the TX/RX MSI-x interrupt.

I checked the EIMS in Guest, it showed the value is "0x0". So I changed the value to "0x1" to enable the TX/RX MSI-x,

but unfortunately the changing did not take effect. Read the EIMS value still is "0x0".

So my questions are:

1. what is VF master abort?

2. what could I do (for PF and VF) when VF master abort happened?

Thanks

[idata]

Hi RyanMile,

Thank you for posting in Wired Ethernet Commmunity.While we're checking your concern, please share the PF and VF driver version loaded in your system.regards,Vince

[idata]

Hi Vince,

My environment is:

Host: CentOS7.2 Linux 3.10.0-327.28.2.el7.x86_64

PF version is:

# ethtool -i enp4s0f0

driver: ixgbe

version: 4.0.1-k-rh7.2

firmware-version: 0x1bab0001

bus-info: 0000:04:00.0

supports-statistics: yes

supports-test: yes

supports-eeprom-access: yes

supports-register-dump: yes

supports-priv-flags: no

Guest: FreeBSD 10.1

VF version is: 1.1.4 (obtained from source code: ixv.c)

FYI, I found the TxRx queue never disabled in Guest when ixv_disable_queue executed (write to EIMC).

So I turned off the TxRx MSI-x bit of EIAM in ixv VF driver. After that, in my test, the master abort never happened.

I am not sure if this EIAM and EIMC will cause VF master abort.

Thanks for your attention.

[idata]

Hi RyanMile, Thanks for providing the update, please let us know if you still have other query regarding 82599.

regards,Vince