netdev - Re: [PATCH 5/7] mips: bpf: Add JIT workarounds for CPU errata

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Message-ID: <e9e1c9e4-abc1-5fd9-637a-8a7205bbf4c6@flygoat.com>
Date:   Tue, 5 Oct 2021 19:00:14 +0100
From:   Jiaxun Yang <jiaxun.yang@...goat.com>
To:     Johan Almbladh <johan.almbladh@...finetworks.com>, ast@...nel.org,
        daniel@...earbox.net, andrii@...nel.org, paulburton@...nel.org
Cc:     kafai@...com, songliubraving@...com, yhs@...com,
        john.fastabend@...il.com, kpsingh@...nel.org,
        tsbogend@...ha.franken.de, chenhuacai@...nel.org,
        yangtiezhu@...ngson.cn, tony.ambardar@...il.com,
        bpf@...r.kernel.org, linux-mips@...r.kernel.org,
        netdev@...r.kernel.org
Subject: Re: [PATCH 5/7] mips: bpf: Add JIT workarounds for CPU errata



在 2021/10/5 17:54, Johan Almbladh 写道:
> This patch adds workarounds for the following CPU errata to the MIPS
> eBPF JIT, if enabled in the kernel configuration.
>
>    - R10000 ll/sc weak ordering
>    - Loongson-3 ll/sc weak ordering
>    - Loongson-2F jump hang
>
> The Loongson-2F nop errata is implemented in uasm, which the JIT uses,
> so no additional mitigations are needed for that.
>
> Signed-off-by: Johan Almbladh <johan.almbladh@...finetworks.com>
Reviewed-by: Jiaxun Yang <jiaxun.yang@...goat.com>

Thanks!

- Jiaxun
> ---
>