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Re: [PATCH 20/20] target/loongarch: Add linux-user emulation support
From: |
Alex Bennée |
Subject: |
Re: [PATCH 20/20] target/loongarch: Add linux-user emulation support |
Date: |
Wed, 30 Jun 2021 10:36:11 +0100 |
User-agent: |
mu4e 1.5.13; emacs 28.0.50 |
maobibo <maobibo@loongson.cn> writes:
> 在 2021年06月29日 21:42, Peter Maydell 写道:
>> On Mon, 28 Jun 2021 at 13:05, Song Gao <gaosong@loongson.cn> wrote:
>>>
>>> Add files to linux-user/loongarch64
>>> Add file to default-configs
>>> Add loongarch to target/meson.build
>>>
>>> Signed-off-by: Song Gao <gaosong@loongson.cn>
>>> ---
>>> MAINTAINERS | 1 +
>>> default-configs/targets/loongarch64-linux-user.mak | 4 +
>>> include/elf.h | 2 +
>>> linux-user/elfload.c | 58 ++++
>>> linux-user/loongarch64/cpu_loop.c | 177 ++++++++++++
>>> linux-user/loongarch64/signal.c | 193 +++++++++++++
>>> linux-user/loongarch64/sockbits.h | 1 +
>>> linux-user/loongarch64/syscall_nr.h | 307
>>> +++++++++++++++++++++
>>> linux-user/loongarch64/target_cpu.h | 36 +++
>>> linux-user/loongarch64/target_elf.h | 14 +
>>> linux-user/loongarch64/target_fcntl.h | 12 +
>>> linux-user/loongarch64/target_signal.h | 28 ++
>>> linux-user/loongarch64/target_structs.h | 49 ++++
>>> linux-user/loongarch64/target_syscall.h | 46 +++
>>> linux-user/loongarch64/termbits.h | 229 +++++++++++++++
>>> linux-user/syscall_defs.h | 8 +-
>>> meson.build | 2 +-
>>> qapi/machine-target.json | 4 +-
>>> target/loongarch/meson.build | 19 ++
>>> target/meson.build | 1 +
>>> 20 files changed, 1185 insertions(+), 6 deletions(-)
>>
>> This is a massive patch that would benefit from being split up
>> into multiple smaller patches.
>>
>> I'm told by a kernel developer that loongarch hasn't yet been
>> accepted into the Linux kernel mainline. Until it has been, the
>> syscall ABI for it is not yet stable, so we won't be able to take
>> the linux-user patches for it yet. (We have been burned in the
>> past by taking linux-user architecture support patches without
>> realizing they weren't for a stable ABI, and then being out of
>> sync with the eventual upstream kernel ABI that was accepted.)
>>
>> We can certainly do code review in the meantime, though.
> Thanks for reviewing the big series patches. It is understandable that
> there should be linux kernel merged for one new architecture support
> firstly, and then there will be linux-user simulator later.
>
> We are planning to submit patch to linux kernel for LoongArch support,
> there is the link:
> https://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson.git/log/?h=loongarch-next
>
> And we will continueto submit softmmu support for LoongArch. And is there
> any extra requirements for softmmu simulation for new architecture,
> such as gcc/binutils/bios?
Ideally if there are some pre-built toolchains either as part of a
distro (we've used Debian Sid before for some) or easily to install in a
docker container as binary tarballs (like we do for tricore) then we can
enable basic check-tcg functionality.
Going forward having stable URLs for test images of distros means we can
also enable check-acceptance tests.
>
> regards
> bibo, mao
>
>
>>
>> thanks
>> -- PMM
>>
--
Alex Bennée
- [PATCH 10/20] target/loongarch: Add fixed point load/store instruction translation, (continued)
- [PATCH 10/20] target/loongarch: Add fixed point load/store instruction translation, Song Gao, 2021/06/28
- [PATCH 09/20] target/loongarch: Add fixed point bit instruction translation, Song Gao, 2021/06/28
- [PATCH 12/20] target/loongarch: Add fixed point extra instruction translation, Song Gao, 2021/06/28
- [PATCH 11/20] target/loongarch: Add fixed point atomic instruction translation, Song Gao, 2021/06/28
- [PATCH 15/20] target/loongarch: Add floating point conversion instruction translation, Song Gao, 2021/06/28
- [PATCH 14/20] target/loongarch: Add floating point comparison instruction translation, Song Gao, 2021/06/28
- [PATCH 13/20] target/loongarch: Add floating point arithmetic instruction translation, Song Gao, 2021/06/28
- [PATCH 20/20] target/loongarch: Add linux-user emulation support, Song Gao, 2021/06/28
- Re: [PATCH 20/20] target/loongarch: Add linux-user emulation support, Song Gao, 2021/06/29
[PATCH 18/20] target/loongarch: Add branch instruction translation, Song Gao, 2021/06/28
[PATCH 16/20] target/loongarch: Add floating point move instruction translation, Song Gao, 2021/06/28
[PATCH 17/20] target/loongarch: Add floating point load/store instruction translation, Song Gao, 2021/06/28
[PATCH 19/20] target/loongarch: Add disassembler, Song Gao, 2021/06/28
[PATCH 05/20] target/loongarch: Add memory management support, Song Gao, 2021/06/28
[PATCH 06/20] target/loongarch: Add main translation routines, Song Gao, 2021/06/28