How to enable virtio-scsi by default?

[zhanghaiyang9999]

I used the latest OVMF(OvmfPkg) with PVE environment, If the virtual machine has more than one virtio-scsi disk, in the grub phase, just can only recognize one disk, but if I set the boot order in PVE environment, then all the other virtio-scsi disks will be recognized in the grub phase.

My question is:
How does the OvmfPkg codes control the virtio-scsi disks behavior in the booting phase? can it initialize all the virtio-scsi disks by default?
I made some changes for a test, I change these value to TRUE, then rebuilt the OVMF.fd, it still can't initialize the virtio-scsi disks on booting.
DEFINE PVSCSI_ENABLE = TRUE
DEFINE MPT_SCSI_ENABLE = TRUE
DEFINE LSI_SCSI_ENABLE = TRUE

Does anybody know how to modify the codes to support my requirement? Thanks!