[vfio-users] vfio-pci 0000:88:00.1: timed out waiting for pending transaction; performing function level reset anyway

[王强]

Hi, I have two graphics card in a pc, the two graphics card are in
downstream of a PLX/PEX PCIE Bridge Chip. I test four VM to run furmark
bencehmark. But after a few minutes, I got some errors from kernel:


[ 1012.160863] pcieport 0000:80:02.0: PCIe Bus Error:
severity=Uncorrected (Non-Fatal), type=Transaction Layer,
id=8010(Requester ID)

[ 1012.164695] pcieport 0000:80:02.0:   device [8086:2f04] error
status/mask=00004000/00000000

[ 1012.168566] pcieport 0000:80:02.0:    [14] Completion Timeout     (First)

[ 1012.178387] pcieport 0000:80:02.0: PCIe Bus Error:
severity=Uncorrected (Non-Fatal), type=Transaction Layer,
id=8010(Requester ID)

[ 1012.186594] pcieport 0000:80:02.0:   device [8086:2f04] error
status/mask=00004000/00000000

[ 1012.191010] pcieport 0000:80:02.0:    [14] Completion Timeout     (First)

[ 1215.142467] vfio-pci 0000:88:00.1: timed out waiting for pending
transaction; performing function level reset anyway

and I check the vm state, all of them are paused. I can't use virsh reset
command to reset these vm.

        [root at test ~]# *virsh list*
         Id    Name                           State
        ----------------------------------------------------
         5     S850-06                    paused
         6     S850-05                    paused

and the lspci result is

        [root at test ~]# *lspci -nns 80:02.0*

80:02.0 PCI bridge [0604]: Intel Corporation Xeon E7 v3/Xeon E5
v3/Core i7 PCI Express Root Port 2 [8086:2f04] (rev 02)
        [root at test ~]# *lspci -tvv*
         +-[0000:80]-+-02.0-[81-8e]----00.0-[82-8e]--+-08.0-[83-88]----00.0-[84-88]--+-01.0-[85]----00.0

         |
         |
 +-02.0-[86]----00.0
         |
         |
 +-04.0-[87]--+-00.0  Advanced Micro Devices, Inc. [AMD/ATI] Cape
Verde PRO [Radeon HD
8740]
         |
         |                                                     |

\-00.1  Advanced Micro Devices, Inc. [AMD/ATI] Cape Verde/Pitcairn
HDMI Audio [Radeon HD 7700/7800 Series]
         |
         |
\-05.0-[88]--+-00.0  Advanced Micro Devices, Inc. [AMD/ATI] Cape Verde
PRO [Radeon HD
8740]
         |
         |

\-00.1  Advanced Micro Devices, Inc. [AMD/ATI] Cape Verde/Pitcairn
HDMI Audio [Radeon HD 7700/7800 Series]



Is it impossible to reset vm or vfio-pci after a pcie aer happen?
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