сделал так
-smp 4,sockets=1,cores=4,threads=1 # -numa node,nodeid=0,cpus=0-3
\
1536 pages successfully allocated. Starting the VM with 6144 Mb RAM.
...
WARNING: Image format was not specified for '/dev/nvme0n1' and probing guessed raw.
Automatically detecting the format is dangerous for raw images, write operations on block 0 will be restricted.
Specify the 'raw' format explicitly to remove the restrictions.
WARNING: Image format was not specified for '/dev/sdd' and probing guessed raw.
Automatically detecting the format is dangerous for raw images, write operations on block 0 will be restricted.
Specify the 'raw' format explicitly to remove the restrictions.
qemu-system-x86_64: unable to map backing store for guest RAM: Cannot allocate memory