Re: [PATCH for-5.1 V4 0/7] mips: Add Loongson-3 machine support (with KVM)

[Aleksandar Markovic]

Just adding Jiaxun.

пет, 5. јун 2020. у 10:38 Aleksandar Markovic
<aleksandar.qemu.devel@gmail.com> је написао/ла:
>
> уто, 2. јун 2020. у 04:38 Huacai Chen <zltjiangshi@gmail.com> је написао/ла:
> >
> > Loongson-3 CPU family include Loongson-3A R1/R2/R3/R4 and Loongson-3B
> > R1/R2.
>
> Hi, Huacai,
>
> The documents you kindly provided contain some valuable info on
> Loongson-3A R1/R2/R3/R4 and Loongson-3B R1/R2. However, I
> couldn't find detailed instruction-by-instruction specifications.
>
> In fact, I don't need all the details right now, but some form of
> overview of instructions sets of Loongson-3A R1/R2/R3/R4 and
> Loongson-3B R1/R2. Could you please provide textual description
> (one of two paragraph) of supported instructions for each of these
> models:
>
> * Loongson-3A R1
> * Loongson-3A R2
> * Loongson-3A R3
> * Loongson-3A R4
> * Loongson-3B R1
> * Loongson-3B R2
>
> (what is the base instructuin set; the difference to the previous model;
> what SIMD extension (LMI/MSA) is supported other specifics around
> supported instructions)
>
> Based on your answer I may bring forward some suggestions on the
> improvement of v4 of this series.
>
> Truly yours,
> Aleksandar
>
> > 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.
> >
> > 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.devel@gmail.com>.
> >
> > Huacai Chen(4):
> >  hw/mips: Implement the kvm_type() hook in MachineClass
> >  target/mips: Add Loongson-3 CPU definition
> >  hw/mips: Add Loongson-3 machine support (with KVM)
> >  MAINTAINERS: Add myself as Loongson-3 maintainer
> >
> > Signed-off-by: Huacai Chen <chenhc@lemote.com>
> > ---
> >  MAINTAINERS                          |   5 +
> >  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                     |  42 ++
> >  hw/mips/loongson3.c                  | 901 
> > +++++++++++++++++++++++++++++++++++
> >  include/hw/mips/mips.h               |   3 +
> >  target/mips/cpu.h                    |  28 ++
> >  target/mips/internal.h               |   2 +
> >  target/mips/mips-defs.h              |   7 +-
> >  target/mips/translate.c              |   2 +
> >  target/mips/translate_init.inc.c     |  86 ++++
> >  14 files changed, 1092 insertions(+), 4 deletions(-)
> >  create mode 100644 hw/mips/common.c
> >  create mode 100644 hw/mips/loongson3.c
> > --
> > 2.7.0