hi all
I have a PCIe device on ESXi6.7, and config it passThrough to guest operation system(ubuntu 16.04TLS).I refer to the following knowledge base pages:
https://kb.vmware.com/s/article/2142307
https://kb.vmware.com/s/article/1010789
The PCIe device driver under guest os must use MSI interrupt mode with 32 messages request.
Using command "lspci -xxx" got different MSI register value on host ESXi and guest operation system.
The "81 01" value for MSI means allows 1 messages request.So the driver not working.
why the register value are different in host ESXi and guest OS?
host ESXi lspci -d
00: 57 1e 01 00 06 04 10 00 00 00 00 12 10 00 00 00
10: 00 00 30 f7 00 00 00 00 0c 00 e4 ff 2f 00 00 00
20: 0c 00 e0 ff 2f 00 00 00 00 00 00 00 57 1e 01 00
30: 00 00 00 00 40 00 00 00 00 00 00 00 0a 01 00 00
40: 01 50 c3 df 08 00 00 00 00 00 00 00 00 00 00 00
50: 05 70 8b 01 98 02 e0 fe 00 00 00 00 00 00 00 00
60: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
70: 10 00 02 00 c2 8f 2c 11 30 20 10 00 01 6d 43 00
80: 40 00 81 10 00 00 00 00 00 00 00 00 00 00 00 00
90: 00 00 00 00 10 00 00 80 00 00 00 00 02 00 00 80
a0: 03 00 01 00 00 00 00 00 00 00 00 00 00 00 00 00
b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
c0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
guest lspci -xxx
00: 57 1e 01 00 07 04 10 00 00 00 00 12 10 40 00 00
10: 00 00 30 fd 00 00 00 00 0c 00 af e7 00 00 00 00
20: 0c 00 a8 e7 00 00 00 00 00 00 00 00 57 1e 01 00
30: 00 00 00 00 40 00 00 00 00 00 00 00 07 01 00 00
40: 01 50 c3 df 08 00 00 00 00 00 00 00 00 00 00 00
50: 05 70 81 01 00 00 e0 fe 00 00 00 00 e5 40 00 00
60: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
70: 10 00 02 00 00 00 00 00 00 00 00 00 02 06 00 00
80: 00 00 02 02 00 00 00 00 00 00 00 00 00 00 00 00
90: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
a0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
c0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
