What were you trying to do that didn't work?
[root@ampere-mtsnow-altramax-13 kar]# /usr/libexec/qemu-kvm -cpu 'host' -object '{"size": 4294967296, "prealloc": false, "share": false, "merge": false, "dump": false, "id": "mem-memN0", "qom-type": "memory-backend-ram"}'
qemu-kvm: warning: Machine type 'virt-rhel9.4.0' is deprecated: machines from the previous RHEL major release are subject to deletion in the next RHEL major release
qemu-kvm: ../system/memory.c:2419: void *memory_region_get_ram_ptr(MemoryRegion *): Assertion `mr->ram_block' failed.
Aborted (core dumped)

Please provide the package NVR for which the bug is seen:
Host Distro:     RHEL-10.0-20240910.2 
Host Kernel:  6.11.0-0.rc5.22.el10.aarch64+64k
QEMU:  qemu-kvm-9.1.0-1.el10
edk2:  edk2-20240524-5.el10

How reproducible is this bug?:
With -object '{"size": 4294967296, "prealloc": false, "share": false, "merge": false, "dump": false, "id": "mem-memN0", "qom-type": "memory-backend-ram"}' boot

Steps to reproduce
100%

Other
qemu-kvm-9.0.0-8.el10 -----> can boot normally
I will use a binary search to find the commit that caused the issue.
The issue can be reproduced on both 4k and 64k hosts.{}