On Wed, Aug 09, 2023 at 04:21:47AM +0530, Maverickk 78 wrote: > Hello, > > I am running qemu-system-x86_64 > > qemu-system-x86_64 --version > QEMU emulator version 8.0.92 (v8.1.0-rc2-80-g0450cf0897) > > qemu-system-x86_64 \ > -m 2G,slots=4,maxmem=4G \ > -smp 4 \ > -machine type=q35,accel=kvm,cxl=on \ > -enable-kvm \ > -nographic \ > -device pxb-cxl,id=cxl.0,bus=pcie.0,bus_nr=52 \ > -device cxl-rp,id=rp0,bus=cxl.0,chassis=0,port=0,slot=0 \ > -object memory-backend-file,id=mem0,mem-path=/tmp/mem0,size=1G,share=true \ > -device cxl-type3,bus=rp0,volatile-memdev=mem0,id=cxl-mem0 \ > -M cxl-fmw.0.targets.0=cxl.0,cxl-fmw.0.size=1G > > > I was expecting the CXL memory to be listed in "System Ram", the lsmem > shows only 2G memory which is System RAM, it's not listing the CXL > memory. > > Do I need to pass any particular parameter in the kernel command line? > > Is there any documentation available? I followed the inputs provided in > > https://lore.kernel.org/linux-mm/y+csoehvlkudn...@kroah.com/T/ > > Is there any documentation/blog listed?
If I remember it correctly, for volatile cxl memory, we need to create a region and then it will be discovered as system memory and shows up. Try to create a region with "cxl create-region". Fan >
