Re: [PATCH for-5.1 V3 0/7] mips: Add Loongson-3 machine support (with KVM)

[Yonggang Luo]

The english version of the reference document is hard to head.

I suggest first convert the chinese version into markdown or alternative format and

place them at github.

And we then translate the document with google translate.  

On Sun, May 3, 2020 at 6:22 PM Huacai Chen <address@hidden> 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.

We are preparing to add QEMU's Loongson-3 support. MIPS VZ extension is
fully supported in Loongson-3A R4+, so we at first add QEMU/KVM support
in this series. And the next series will add QEMU/TCG support (it will
emulate Loongson-3A R1).

We already have a full functional Linux kernel (based on Linux-5.4.x LTS
but not upstream yet) here:

https://github.com/chenhuacai/linux

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;
4, Build QEMU-5.0.0 with this patchset;
5, modprobe kvm;
6, Use QEMU with TCG (available in future):
       qemu-system-mips64el -M loongson3,accel=tcg -cpu Loongson-3A1000 -kernel <path_to_kernel> -append ...
   Use QEMU with KVM (available at present):
       qemu-system-mips64el -M loongson3,accel=kvm -cpu Loongson-3A4000 -kernel <path_to_kernel> -append ...

   The "-cpu" parameter can be omitted 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.

Huacai Chen(7):
 configure: Add KVM target support for MIPS64
 hw/mips: Implement the kvm_type() hook in MachineClass
 hw/mips: Add CPU IRQ3 delivery for KVM
 target/mips: Add Loongson-3 CPU definition
 target/mips: Add more CP0 register for save/restor
 hw/mips: Add Loongson-3 machine support (with KVM)
 MAINTAINERS: Add myself as Loongson-3 maintainer

Signed-off-by: Huacai Chen <address@hidden>
---
 MAINTAINERS                          |   5 +
 configure                            |   2 +-
 default-configs/mips64el-softmmu.mak |   1 +
 hw/core/Makefile.objs                |   2 +-
 hw/core/null-machine.c               |   4 +
 hw/mips/Kconfig                      |  10 +
 hw/mips/Makefile.objs                |   3 +-
 hw/mips/common.c                     |  31 ++
 hw/mips/mips_int.c                   |   4 +-
 hw/mips/mips_loongson3.c             | 901 +++++++++++++++++++++++++++++++++++
 include/hw/mips/mips.h               |   3 +
 target/mips/cpu.h                    |  28 ++
 target/mips/internal.h               |   2 +
 target/mips/kvm.c                    | 212 +++++++++
 target/mips/machine.c                |   6 +-
 target/mips/mips-defs.h              |   7 +-
 target/mips/translate.c              |   2 +
 target/mips/translate_init.inc.c     |  86 ++++
 18 files changed, 1300 insertions(+), 9 deletions(-)
 create mode 100644 hw/mips/common.c
 create mode 100644 hw/mips/mips_loongson3.c
--
2.7.0

--

         此致
礼
罗勇刚
Yours
    sincerely,
Yonggang Luo