From: Tiezhu Yang <yangtiezhu@loongson.cn>
To: bot+bpf-ci@kernel.org, chenhuacai@kernel.org, hengqi.chen@gmail.com
Cc: loongarch@lists.linux.dev, bpf@vger.kernel.org,
linux-kernel@vger.kernel.org, ast@kernel.org, andrii@kernel.org,
daniel@iogearbox.net, martin.lau@kernel.org, eddyz87@gmail.com,
yonghong.song@linux.dev, clm@meta.com, ihor.solodrai@linux.dev
Subject: Re: [PATCH v1 1/5] LoongArch: Define format for AM{SWAP/ADD}.{B/H}, DBAR and BSTRINS.D
Date: Thu, 2 Apr 2026 10:48:38 +0800 [thread overview]
Message-ID: <3b8ef23a-e324-4ad8-430c-e02adca44a1c@loongson.cn> (raw)
In-Reply-To: <6089c3c90bd2f2cf2848a39fc0d30219d0f3f95f9c74257a19d01de053eb1c44@mail.kernel.org>
On 2026/4/1 下午4:23, bot+bpf-ci@kernel.org wrote:
>> diff --git a/arch/loongarch/kernel/cpu-probe.c b/arch/loongarch/kernel/cpu-probe.c
>> index 657bbae6c1c7..93466fc7d33d 100644
>> --- a/arch/loongarch/kernel/cpu-probe.c
>> +++ b/arch/loongarch/kernel/cpu-probe.c
>> @@ -177,6 +177,10 @@ static void cpu_probe_common(struct cpuinfo_loongarch *c)
>> c->options |= LOONGARCH_CPU_LAM;
>> elf_hwcap |= HWCAP_LOONGARCH_LAM;
>> }
>> + if (config & CPUCFG2_LAM_BH) {
>> + c->options |= LOONGARCH_CPU_LAM_BH;
>> + elf_hwcap |= HWCAP_LOONGARCH_LAM_BH;
>> + }
>
> Should there be a corresponding entry in the "Features" line of
> /proc/cpuinfo for the new lam_bh capability?
>
> Every other feature that sets elf_hwcap in cpu_probe_common() also
> has a matching seq_puts() in show_cpuinfo() in proc.c:
>
> arch/loongarch/kernel/proc.c:show_cpuinfo() {
> ...
> if (cpu_has_lam)
> seq_puts(m, " lam");
> if (cpu_has_scq)
> seq_puts(m, " scq");
> ...
> }
>
> The new cpu_has_lam_bh is missing from this list.
Yes, I think so, thank you.
I will wait for more comments before sending v2.
Thanks,
Tiezhu
next prev parent reply other threads:[~2026-04-02 2:48 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-04-01 7:12 [PATCH v1 0/5] LoongArch: BPF: Support more atomic instructions Tiezhu Yang
2026-04-01 7:12 ` [PATCH v1 1/5] LoongArch: Define format for AM{SWAP/ADD}.{B/H}, DBAR and BSTRINS.D Tiezhu Yang
2026-04-01 8:23 ` bot+bpf-ci
2026-04-02 2:48 ` Tiezhu Yang [this message]
2026-04-01 7:12 ` [PATCH v1 2/5] LoongArch: BPF: Add the default case in emit_atomic() and rename it Tiezhu Yang
2026-04-01 7:12 ` [PATCH v1 3/5] LoongArch: BPF: Support 8 and 16 bit read-modify-write instructions Tiezhu Yang
2026-04-01 7:12 ` [PATCH v1 4/5] LoongArch: BPF: Support load-acquire and store-release instructions Tiezhu Yang
2026-04-01 7:12 ` [PATCH v1 5/5] selftests/bpf: Make CAN_USE_LOAD_ACQ_STORE_REL usable for LoongArch Tiezhu Yang
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