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. 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 > >
