On Wednesday, September 16, 2020, Huacai Chen <zltjiang...@gmail.com> wrote:
> Loongson-3 CPU family include Loongson-3A R1/R2/R3/R4 and Loongson-3B > R1/R2. Loongson-3A R1 is the oldest and its ISA is the smallest, while > Loongson-3A R4 is the newest and its ISA is almost the superset of all > others. To reduce complexity, in QEMU we just define two CPU types: > > 1, "Loongson-3A1000" CPU which is corresponding to Loongson-3A R1. It is > suitable for TCG because Loongson-3A R1 has fewest ASE. > 2, "Loongson-3A4000" CPU which is corresponding to Loongson-3A R4. It is > suitable for KVM because Loongson-3A R4 has the VZ ASE. > > Loongson-3 lacks English documents. I've tried to translated them with > translate.google.com, and the machine translated documents (together > with their original Chinese versions) are available here. > > Loongson-3A R1 (Loongson-3A1000) > User Manual Part 1: > http://ftp.godson.ac.cn/lemote/3A1000_p1.pdf > http://ftp.godson.ac.cn/lemote/Loongson3A1000_processor_user_manual_P1.pdf > (Chinese Version) > User Manual Part 2: > http://ftp.godson.ac.cn/lemote/3A1000_p2.pdf > http://ftp.godson.ac.cn/lemote/Loongson3A1000_processor_user_manual_P2.pdf > (Chinese Version) > > Loongson-3A R2 (Loongson-3A2000) > User Manual Part 1: > http://ftp.godson.ac.cn/lemote/3A2000_p1.pdf > http://ftp.godson.ac.cn/lemote/Loongson3A2000_user1.pdf (Chinese Version) > User Manual Part 2: > http://ftp.godson.ac.cn/lemote/3A2000_p2.pdf > http://ftp.godson.ac.cn/lemote/Loongson3A2000_user2.pdf (Chinese Version) > > Loongson-3A R3 (Loongson-3A3000) > User Manual Part 1: > http://ftp.godson.ac.cn/lemote/3A3000_p1.pdf > http://ftp.godson.ac.cn/lemote/Loongson3A3000_3B3000usermanual1.pdf > (Chinese Version) > User Manual Part 2: > http://ftp.godson.ac.cn/lemote/3A3000_p2.pdf > http://ftp.godson.ac.cn/lemote/Loongson3A3000_3B3000usermanual2.pdf > (Chinese Version) > > Loongson-3A R4 (Loongson-3A4000) > User Manual Part 1: > http://ftp.godson.ac.cn/lemote/3A4000_p1.pdf > http://ftp.godson.ac.cn/lemote/3A4000user.pdf (Chinese Version) > User Manual Part 2: > I'm sorry that it is unavailable now. > > And human-translated documents (W.I.P) are available here now: > https://github.com/loongson-community/docs/tree/master/ > English-translation-of-Loongson-manual > > Both KVM and TCG are available now! > > We now already have a full functional Linux kernel (based on Linux-5.4.x > LTS, the kvm host side and guest side have both been upstream for Linux- > 5.9, but Linux-5.9 has not been released yet) here: > > https://github.com/chenhuacai/linux > > Of course the upstream kernel is also usable (though it is "unstable" > now): > > https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git > > How to use QEMU/Loongson-3? > 1, Download kernel source from the above URL; > 2, Build a kernel with arch/mips/configs/loongson3_{def,hpc}config; > 3, Boot a Loongson-3A4000 host with this kernel (for KVM mode); > 4, Build QEMU-master with this patchset; > 5, modprobe kvm (only necessary for KVM mode); > 6, Use QEMU with TCG: > qemu-system-mips64el -M loongson3-virt,accel=tcg -cpu > Loongson-3A1000 -kernel <path_to_kernel> -append ... > Use QEMU with KVM: > qemu-system-mips64el -M loongson3-virt,accel=kvm -cpu > Loongson-3A4000 -kernel <path_to_kernel> -append ... > > The "-cpu" parameter is optional here and QEMU will use the correct > type for TCG/KVM automatically. > > V1 -> V2: > 1, Add a cover letter; > 2, Improve CPU definitions; > 3, Remove LS7A-related things (Use GPEX instead); > 4, Add a description of how to run QEMU/Loongson-3. > > V2 -> V3: > 1, Fix all possible checkpatch.pl errors and warnings. > > V3 -> V4: > 1, Sync code with upstream; > 2, Remove merged patches; > 3, Fix build failure without CONFIG_KVM; > 4, Add Reviewed-by: Aleksandar Markovic <aleksandar.qemu.de...@gmail.com>. > > V4 -> V5: > 1, Improve coding style; > 2, Remove merged patches; > 3, Rename machine name from "loongson3" to "loongson3-virt"; > 4, Rework the "loongson3-virt" machine to drop any ISA things; > 5, Rework "hw/mips: Implement the kvm_type() hook in MachineClass"; > 6, Add Jiaxun Yang as a reviewer of Loongson-3. > > V5 -> V6: > 1, Fix license preamble; > 2, Improve commit messages; > 3, Add hw/intc/loongson_liointc.c to MAINTAINERS; > 4, Fix all possible checkpatch.pl errors and warnings. > > V7 and V8 have only one patch (machine definition) with some minor > improvements. > > V8 -> V9: > 1, Update KVM type definition from kernel; > 2, Fix PageMask with variable page size for TCG; > 3, Add TCG support (add Loongson-EXT instructions). > > Huacai Chen and Jiaxun Yang (6): > linux-headers: Update MIPS KVM type defintition > target/mips: Fix PageMask with variable page size > target/mips: Add loongson-ext lswc2 group of instructions (Part 1) > target/mips: Add loongson-ext lswc2 group of instructions (Part 2) > target/mips: Add loongson-ext lsdc2 group of instructions > hw/mips: Add Loongson-3 machine support > > Signed-off-by: Huacai Chen <che...@lemote.com> > --- > default-configs/mips64el-softmmu.mak | 1 + > hw/mips/Kconfig | 11 + > hw/mips/fw_cfg.c | 35 ++ > hw/mips/fw_cfg.h | 19 + > hw/mips/loongson3_virt.c | 956 ++++++++++++++++++++++++++++++ > +++++ > hw/mips/meson.build | 3 +- > linux-headers/linux/kvm.h | 5 +- > target/mips/cp0_helper.c | 36 +- > target/mips/cpu.h | 1 + > target/mips/translate.c | 437 ++++++++++++++++ > 10 files changed, 1494 insertions(+), 10 deletions(-) > create mode 100644 hw/mips/fw_cfg.c > create mode 100644 hw/mips/fw_cfg.h > create mode 100644 hw/mips/loongson3_virt.c > -- There should be a suitable note in QEMU documentation describing new functionality. Thanks, Aleksandar > 2.7.0 >
