Hi, I would like to resume the discussion on extending the number of PCI buses to 256 (as in Q35) as a follow-up of past discussions: https://lists.gnu.org/archive/html/qemu-devel/2018-01/msg03631.html.
With the current 16MB ECAM region we are limited to 16 PCIe busses. Could we envision to have a 256MB ECAM region and move it to another location beyond 256GB, in virt2_13 machine type? Current ECAM range within [0x3f000000, 0x40000000] would be kept unchanged for legacy and when vms->highmem is set to false. Migration from <2_13 to >=2_13 would be allowed whereas migration from > =2.13 to <2.13 wouldn't. Thanks Eric
