Re: CXL volatile memory is not listed

[Maverickk 78]

Thanks Phil, David and Fan

Looks like it was an error from my side due to lack of information
cxl create-region works :)


On Thu, 10 Aug 2023 at 16:29, Philippe Mathieu-Daudé <philmd@linaro.org> wrote:
>
> Hi,
>
> Cc'ing Igor and David.
>
> On 9/8/23 00:51, 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.
>
> Sounds like a bug. Do you mind reporting at
> https://gitlab.com/qemu-project/qemu/-/issues?
>
> Thanks,
>
> Phil.
>
> > 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+CSOeHVLKudN0A6@kroah.com/T/
> >
> > Is there any documentation/blog listed?
> >
>