On 01.01.24 08:53, Ho-Ren (Jack) Chuang wrote:
Introduce a new configuration option 'host-mem-type=' in the '-object memory-backend-ram', allowing users to specify from which type of memory to allocate.Users can specify 'cxlram' as an argument, and QEMU will then automatically locate CXL RAM NUMA nodes and use them as the backend memory. For example: -object memory-backend-ram,id=vmem0,size=19G,host-mem-type=cxlram \ -device pxb-cxl,bus_nr=12,bus=pcie.0,id=cxl.1 \ -device cxl-rp,port=0,bus=cxl.1,id=root_port13,chassis=0,slot=2 \ -device cxl-type3,bus=root_port13,volatile-memdev=vmem0,id=cxl-vmem0 \ -M cxl-fmw.0.targets.0=cxl.1,cxl-fmw.0.size=19G,cxl-fmw.0.interleave-granularity=8k \
You can achieve the exact same thing already simply by using memory policies and detecting the node(s) before calling QEMU, no?
There has to be a good reason to add such a shortcut into QEMU, and it should be spelled out here.
-- Cheers, David / dhildenb
