linux-kernel - Re: BUG: bpf test case fails to run on LoongArch

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Message-ID: <c9d7be2b-8c2d-bd5e-b32d-37ed4bb693cc@loongson.cn>
Date: Wed, 23 Apr 2025 09:49:13 +0800
From: bibo mao <maobibo@...ngson.cn>
To: Tiezhu Yang <yangtiezhu@...ngson.cn>, Huacai Chen <chenhuacai@...ngson.cn>
Cc: bpf@...r.kernel.org, linux-kernel@...r.kernel.org,
 loongarch@...ts.linux.dev
Subject: Re: BUG: bpf test case fails to run on LoongArch



On 2025/4/23 上午9:28, Tiezhu Yang wrote:
> On 04/21/2025 10:52 AM, bibo mao wrote:
>> Hi,
>>
>> When I run built-in bpf test case with lib/test_bpf.c,
>> it reports such error, I do not know whether it is a problem.
>>
>>  test_bpf: #843 ALU32_RSH_X: all shift values jited:1 239 PASS
>>  test_bpf: #844 ALU32_ARSH_X: all shift values jited:1 237 PASS
>>  test_bpf: #845 ALU64_LSH_X: all shift values with the same register
>>  ------------[ cut here ]------------
>>  kernel BUG at lib/test_bpf.c:794!
> 
> This is a known issue I have ever encountered.
> I guess your GCC version is 14.1, this is a bug of GCC,
yes, My gcc version is 14.1

> it has been fixed in the higher version, you can update
> you GCC version (14.2+).
OK, I will update my gcc. And sorry for the noise.

Regards
Bibo Mao
> 
> $ gcc --version | head -1
> gcc (GCC) 14.2.1 20241104
> $ dmesg -t | grep Summary
> test_bpf: Summary: 1053 PASSED, 0 FAILED, [0/1041 JIT'ed]
> test_bpf: test_tail_calls: Summary: 10 PASSED, 0 FAILED, [0/10 JIT'ed]
> test_bpf: test_skb_segment: Summary: 2 PASSED, 0 FAILED
> test_bpf: Summary: 1053 PASSED, 0 FAILED, [1041/1041 JIT'ed]
> test_bpf: test_tail_calls: Summary: 10 PASSED, 0 FAILED, [10/10 JIT'ed]
> test_bpf: test_skb_segment: Summary: 2 PASSED, 0 FAILED
> 
> Thanks,
> Tiezhu
>