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. 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
