[V11,0/8] mips: Add Loongson-3 machine support

Message

chen huacai Sept. 24, 2020, 7:35 a.m. UTC

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 <[e-mail]>.

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).

V9 -> V10:
1, Split fw_cfg to a separate patch;
2, Split boot parameters definition to a local header;
3, Update MIPS machine documentation;
4, Many other improvements suggested by Philippe Mathieu-Daudé.

V10 -> V11:
1, Fix some typos;
2, Add Reviewed-by: Philippe Mathieu-Daudé <[e-mail]>.

Huacai Chen and Jiaxun Yang (8):
 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: Implement fw_cfg_arch_key_name()
 hw/mips: Add Loongson-3 machine support
 docs/system: Update MIPS machine documentation

Signed-off-by: Huacai Chen <[e-mail]>
---
 default-configs/mips64el-softmmu.mak |   1 +
 docs/system/cpu-models-mips.rst.inc  |  10 +-
 docs/system/target-mips.rst          |  10 +
 hw/mips/Kconfig                      |  11 +
 hw/mips/fw_cfg.c                     |  35 ++
 hw/mips/fw_cfg.h                     |  19 +
 hw/mips/loongson3_virt.c             | 775 +++++++++++++++++++++++++++++++++++
 hw/mips/loongson_bootp.h             | 187 +++++++++
 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              | 443 ++++++++++++++++++++
 13 files changed, 1524 insertions(+), 12 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
 create mode 100644 hw/mips/loongson_bootp.h
--
2.7.0

Comments

[e-mail] Sept. 24, 2020, 7:52 a.m. UTC | #1

Patchew URL: https://patchew.org/QEMU/[e-mail]/



Hi,

This series seems to have some coding style problems. See output below for
more information:

Type: series
Message-id: [e-mail]
Subject: [PATCH V11 0/8] mips: Add Loongson-3 machine support

=== TEST SCRIPT BEGIN ===
#!/bin/bash
git rev-parse base > /dev/null || exit 0
git config --local diff.renamelimit 0
git config --local diff.renames True
git config --local diff.algorithm histogram
./scripts/checkpatch.pl --mailback base..
=== TEST SCRIPT END ===

From https://github.com/patchew-project/qemu
 * [new tag]         patchew/[e-mail] -> patchew/[e-mail]
Switched to a new branch 'test'
cf89714 docs/system: Update MIPS machine documentation
cabf51a hw/mips: Add Loongson-3 machine support
fd67757 hw/mips: Implement fw_cfg_arch_key_name()
dca18c2 target/mips: Add loongson-ext lsdc2 group of instructions
d6d9a34 target/mips: Add loongson-ext lswc2 group of instructions (Part 2)
7832191 target/mips: Add loongson-ext lswc2 group of instructions (Part 1)
40a536a target/mips: Fix PageMask with variable page size
5fe85fa linux-headers: Update MIPS KVM type defintition

=== OUTPUT BEGIN ===
1/8 Checking commit 5fe85fa02e96 (linux-headers: Update MIPS KVM type defintition)
2/8 Checking commit 40a536afdaaf (target/mips: Fix PageMask with variable page size)
3/8 Checking commit 7832191c4d37 (target/mips: Add loongson-ext lswc2 group of instructions (Part 1))
4/8 Checking commit d6d9a344b00a (target/mips: Add loongson-ext lswc2 group of instructions (Part 2))
5/8 Checking commit dca18c2e9cbe (target/mips: Add loongson-ext lsdc2 group of instructions)
6/8 Checking commit fd67757d7016 (hw/mips: Implement fw_cfg_arch_key_name())
WARNING: added, moved or deleted file(s), does MAINTAINERS need updating?
#16: 
new file mode 100644

total: 0 errors, 1 warnings, 60 lines checked

Patch 6/8 has style problems, please review.  If any of these errors
are false positives report them to the maintainer, see
CHECKPATCH in MAINTAINERS.
7/8 Checking commit cabf51ae1224 (hw/mips: Add Loongson-3 machine support)
WARNING: added, moved or deleted file(s), does MAINTAINERS need updating?
#80: 
new file mode 100644

WARNING: line over 80 characters
#226: FILE: hw/mips/loongson3_virt.c:142:
+static void loongson3_pm_write(void *opaque, hwaddr addr, uint64_t val, unsigned size)

ERROR: return is not a function, parentheses are not required
#288: FILE: hw/mips/loongson3_virt.c:204:
+        return (freq * 2);

WARNING: line over 80 characters
#394: FILE: hw/mips/loongson3_virt.c:310:
+    lp->boarddev_table_offset = (uintptr_t)board_devices_info(p) - (uintptr_t)lp;

WARNING: line over 80 characters
#510: FILE: hw/mips/loongson3_virt.c:426:
+    fw_cfg_add_i16(fw_cfg, FW_CFG_MAX_CPUS, (uint16_t)current_machine->smp.max_cpus);

WARNING: line over 80 characters
#558: FILE: hw/mips/loongson3_virt.c:474:
+    sprintf(highmemenv, "%ld", (unsigned long)(loaderparams.ram_size / MiB) - 256);

WARNING: line over 80 characters
#644: FILE: hw/mips/loongson3_virt.c:560:
+static inline void loongson3_virt_devices_init(MachineState *machine, DeviceState *pic)

WARNING: line over 80 characters
#675: FILE: hw/mips/loongson3_virt.c:591:
+                             get_system_io(), 0, virt_memmap[VIRT_PCIE_PIO].size);

WARNING: line over 80 characters
#781: FILE: hw/mips/loongson3_virt.c:697:
+    /* Allocate RAM/BIOS, 0x00000000~0x10000000 is alias of 0x80000000~0x90000000 */

total: 1 errors, 8 warnings, 994 lines checked

Patch 7/8 has style problems, please review.  If any of these errors
are false positives report them to the maintainer, see
CHECKPATCH in MAINTAINERS.

8/8 Checking commit cf897144bf96 (docs/system: Update MIPS machine documentation)
=== OUTPUT END ===

Test command exited with code: 1


The full log is available at
http://patchew.org/logs/[e-mail]/testing.checkpatch/?type=message.
---
Email generated automatically by Patchew [https://patchew.org/].
Please send your feedback to [e-mail]