netdev - Re: [PATCH 2/7] mips: uasm: Add workaround for Loongson-2F nop CPU errata

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Message-ID: <alpine.DEB.2.21.2110181359111.31442@angie.orcam.me.uk>
Date:   Mon, 18 Oct 2021 14:00:27 +0200 (CEST)
From:   "Maciej W. Rozycki" <macro@...am.me.uk>
To:     Johan Almbladh <johan.almbladh@...finetworks.com>
cc:     ast@...nel.org, daniel@...earbox.net, andrii@...nel.org,
        paulburton@...nel.org, kafai@...com, songliubraving@...com,
        yhs@...com, john.fastabend@...il.com, kpsingh@...nel.org,
        Thomas Bogendoerfer <tsbogend@...ha.franken.de>,
        chenhuacai@...nel.org, jiaxun.yang@...goat.com,
        yangtiezhu@...ngson.cn, tony.ambardar@...il.com,
        bpf@...r.kernel.org, linux-mips@...r.kernel.org,
        netdev@...r.kernel.org
Subject: Re: [PATCH 2/7] mips: uasm: Add workaround for Loongson-2F nop CPU
 errata

On Tue, 5 Oct 2021, Johan Almbladh wrote:

> This patch implements a workaround for the Loongson-2F nop in generated,
> code, if the existing option CONFIG_CPU_NOP_WORKAROUND is set. Before,
> the binutils option -mfix-loongson2f-nop was enabled, but no workaround
> was done when emitting MIPS code. Now, the nop pseudo instruction is
> emitted as "or ax,ax,zero" instead of the default "sll zero,zero,0". This

 Confusing typo here, s/ax/at/.

  Maciej