Hi Philippe Mathieu-Daudé :
Hi,
On 9/10/23 11:01, xianglai li wrote:
This series add loongarch kvm support, mainly implement
some interfaces used by kvm such as kvm_arch_get/set_regs,
kvm_arch_handle_exit, kvm_loongarch_set_interrupt, etc.
Currently, we are able to boot LoongArch KVM Linux Guests.
In loongarch VM, mmio devices and iocsr devices are emulated
in user space such as APIC, IPI, pci devices, etc, other
hardwares such as MMU, timer and csr are emulated in kernel.
It is based on temporarily unaccepted linux kvm:
https://github.com/loongson/linux-loongarch-kvm
And We will remove the RFC flag until the linux kvm patches
are merged.
The running environment of LoongArch virt machine:
1. Get the linux source by the above mentioned link.
git checkout kvm-loongarch
make ARCH=loongarch CROSS_COMPILE=loongarch64-unknown-linux-gnu-
loongson3_defconfig
make ARCH=loongarch CROSS_COMPILE=loongarch64-unknown-linux-gnu-
2. Get the qemu source: https://github.com/loongson/qemu
git checkout kvm-loongarch
./configure --target-list="loongarch64-softmmu" --enable-kvm
make
3. Get uefi bios of LoongArch virt machine:
Link:
https://github.com/tianocore/edk2-platforms/tree/master/Platform/Loongson/LoongArchQemuPkg#readme
4. Also you can access the binary files we have already build:
https://github.com/yangxiaojuan-loongson/qemu-binary
The command to boot loongarch virt machine:
$ qemu-system-loongarch64 -machine virt -m 4G -cpu la464 \
-smp 1 -bios QEMU_EFI.fd -kernel vmlinuz.efi -initrd ramdisk \
-serial stdio -monitor telnet:localhost:4495,server,nowait \
-append "root=/dev/ram rdinit=/sbin/init console=ttyS0,115200" \
--nographic
2 years ago Song helped with an access to a LoongArch 3a5000 machine but
it stopped working (IP was x.242.206.180).
Would it be possible to add a Loongarch64 runner to our CI
(ideally with KVM support, but that can come later)? See:
https://www.qemu.org/docs/master/devel/ci.html#jobs-on-custom-runners
Ok, Song Gao will rebuild the Loongarch64 runner environment in the next
few days,
and we will publish it to the community as soon as it is completed.
Thanks,
Xianglai.
Regards,
Phil.
