On Fri, 17 Jan 2025 09:24:15 +0900 Itaru Kitayama <itaru.kitay...@linux.dev> wrote:
> > On Jan 16, 2025, at 19:58, Jonathan Cameron <jonathan.came...@huawei.com> > > wrote: > > > > On Thu, 16 Jan 2025 15:04:53 +0900 > > Itaru Kitayama <itaru.kitay...@linux.dev> wrote: > > > >> Hi Jonathan, > >> > >>> On Jan 14, 2025, at 19:26, Jonathan Cameron <jonathan.came...@huawei.com> > >>> wrote: > >>> > >>> On Tue, 14 Jan 2025 12:03:03 +0900 > >>> Itaru Kitayama <itaru.kitay...@linux.dev> wrote: > >>> > >>>> Hi Jonathan, > >>>> > >>>>> On Jan 10, 2025, at 21:31, Jonathan Cameron > >>>>> <jonathan.came...@huawei.com> wrote: > >>>>> > >>>>> On Fri, 10 Jan 2025 09:20:54 +0000 > >>>>> "Zhijian Li (Fujitsu)" via <qemu-devel@nongnu.org> wrote: > >>>>> > >>>>>> On 10/01/2025 13:29, Itaru Kitayama wrote: > >>>>>>> Hi, > >>>>>>> Is anybody working on the CXL emulation on aarch64? > >>>>>> > >>>>>> I'm not currently working on the CXL emulation on aarch64. > >>>>>> > >>>>>> However, IIRC the CXL maintainer's tree should work. > >>>>>> https://gitlab.com/jic23/qemu/ > >>>>> > >>>>> Pick up latest branch from there. I'm prepping a rebased version > >>>>> with some new stuff but might take a few more days. > >>>> > >>>> Thanks for sharing your work with us. Your master and cxl-2024-11-27 > >>>> branches give: > >>>> > >>>> $ qemu-system-aarch64: -accel tcg,cxl=on: Property 'tcg-accel.cxl' not > >>>> found > >>> > >>> cxl is a machine property not a accel one. So needs to be after virt > >>> There are tests in the tree for bios tables. Copy the command line from > >>> those. > >>> > >>>> > >>>> My commands are below: > >>>> $HOME/projects/qemu/build/qemu-system-aarch64 \ > >>>> -M virt,virtualization=on,gic-version=3 \ > >>>> -M acpi=off -cpu max,sme=off -m 8G -smp 4 \ > >>>> -accel tcg,cxl=on \ > >>>> -nographic \ > >>>> -bios $HOME/cca-v4/out/bin/flash.bin \ > >>>> -kernel Image-cca \ > >>>> -drive > >>>> format=raw,if=none,file=$HOME/cca-v4/out-or/images/rootfs.ext2,id=hd0 \ > >>>> -device virtio-blk-pci,drive=hd0 \ > >>>> -append root=/dev/vda \ > >>>> -nodefaults \ > >>>> --serial tcp:localhost:54320 \ > >>>> -serial tcp:localhost:54321 \ > >>>> -append "root=/dev/vda earlycon console=hvc0" \ > >>>> -device virtio-net-pci,netdev=net0 \ > >>>> -netdev user,id=net0 \ > >>>> -device virtio-9p-device,fsdev=shr0,mount_tag=shr0 \ > >>>> -fsdev local,security_model=none,path=../../,id=shr0 > >>>> > >>>> Yes, I’m using Linaro’s CCA capable OP-TEE builds above. > >>> > >>> I'm a little curious why optee is relevant for this but shouldn't matter > >>> as long > >>> as an appropriate EDK2 is loaded. > >>> > >> > >> I picked up your tree’s “master” and “cxl-next” as of today, and only the > >> latter at least booted. > >> The former gives: > >> > >> qemu-system-aarch64: Property 'virt-9.2-machine.cxl' not found > >> > >> Should I stick with the cxl-next? My concern is that the base QEMU version > >> is a bit old > >> 7.0.50. > > > > Always use the latest dated branch on that tree. I release whenever there > > is something new to carry or a major rebase needed. > > > > cxl-<date> is the right branch to use. Hope that helps. > > > > Okay the cxl-2024-11-27 gives this: > > qemu-system-aarch64: CFMWS does not fit under PA limit > > Below is my QEMU options I use currently: > Try using max as the cpu (or n1 or later). a53 is ancient which is probably where the limit comes from. > /home/itaru/projects/qemu/build/qemu-system-aarch64 \ > -M > virt,virtualization=on,pflash0=rom,pflash1=efivars,gic-version=3,virtualization=on,cxl=on > -m 8192 \ > -cpu cortex-a53 \ > -smp 2 \ > -accel tcg \ > -nographic \ > -display none \ > -kernel ${HOME}/projects/linux/arch/arm64/boot/Image \ > -append "root=/dev/vda rw earlycon acpi=force" \ > -drive format=raw,if=none,file=${HOME}/ubuntu24.img,id=hd0 \ > -device virtio-blk-pci,drive=hd0 \ > -nodefaults \ > -serial mon:stdio \ > -device virtio-net-pci,netdev=net0 \ > -netdev user,id=net0,hostfwd=tcp::8024-:22 \ > -blockdev > node-name=rom,driver=file,filename=edk2-aarch64-code.fd,read-only=true \ > -blockdev > node-name=efivars,driver=file,filename=qemu-arm64-efivars.test \ > -object > memory-backend-file,id=cxl-mem1,share=on,mem-path=/tmp/cxltest.raw,size=256M \ > -object > memory-backend-file,id=cxl-lsa1,share=on,mem-path=/tmp/lsa.raw,size=256M \ > -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,memdev=cxl-mem1,lsa=cxl-lsa1,id=cxl-pmem0 \ > -M cxl-fmw.0.targets.0=cxl.1,cxl-fmw.0.size=4G > > > Jonathan > > > >> > >> Thanks, > >> Itaru. > >> > >>> Jonathan > >>> > >>>> > >>>> Let me know which branch you were suggesting. > >>>> > >>>> Thanks, > >>>> Itaru. > >>>> > >>>>> > >>>>> Note my main development work is on arm64 so that tends to work > >>>>> more reliably than x86 which I only lightly test for stuff that > >>>>> isn't ready for upstream yet. > >>>>> > >>>>> Give me a shout if you run into any problems. > >>>>> > >>>>> The main blocker on upstreaming this is resolving the missing device > >>>>> tree > >>>>> support for PCI expander bridges. I've not made any progress on this > >>>>> since > >>>>> talk at Linaro connect in 2023. > >>>>> > >>>>> Jonathan > >>>>> > >>>>> > >>>>>> > >>>>>> > >>>>>> Thanks > >>>>>> Zhijian > >>>>>> > >>>>>>> If there’s a WIP branch, a pointer would be appreciated. > >>>>>>> > >>>>>>> Itaru > >
