Hi, Aleksandar, On Sun, May 3, 2020 at 6:50 PM Aleksandar Markovic <aleksandar.qemu.de...@gmail.com> wrote: > > нед, 3. мај 2020. у 12:21 Huacai Chen <zltjiang...@gmail.com> је написао/ла: > > > > 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. > > > > Huacai, thanks for putting together v3, which is a little better than v2, and > thanks for addressing my previous suggestions. > > Now, give us some time to digest new data on Loongson3. We will > respond, but it won't happen immediately, which is, you'd agree, > reasonable. Just be patient. > > But again, in general, I salute your efforts very much! > > Yours, Aleksandar I'm sorry for this late response because I have done many tests to reproduce the problem reported at https://patchew.org/QEMU/1588501221-1205-1-git-send-email-che...@lemote.com/, but I don't have such a failure...
What I have done: 1, "make check" on MIPS64 platform (distro is Fedora28 for Loongson); 2, "make check" on X86_64 platform (distro is RHEL8); 3, "make docker-test-quick@centos7 SHOW_ENV=1 NETWORK=1" on X86_64 platform (distro is RHEL8); 4, "make docker-test-quick@centos7 SHOW_ENV=1 J=n NETWORK=1" on X86_64 platform (distro is RHEL8 and I've tried n=2,3,4....14); I always get the same result: Not run: 259 Passed all 117 iotests And, it seems that my patchset doesn't touch anything about iotests, so I don't know why the build test fails on iotests 192 (Maybe your build test has the same problem without my patches). P.S.: I have found a problem that my patchset has a build failure with CONFIG_KVM=n, but this is another problem and I will send V4 to fix it (after collecting all problems in V3). > > > 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 <che...@lemote.com> > > --- > > 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 -- Huacai Chen
