82599 VF trigger master abort

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