linux-kernel - Re: [PATCH -next] Documentation/hw-vuln: Update spectre doc

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Message-ID: <7e615e37-ba5f-4e50-17c6-8f742a366808@huawei.com>
Date:   Tue, 13 Sep 2022 17:38:49 +0800
From:   "linyujun (C)" <linyujun809@...wei.com>
To:     <corbet@....net>, <bp@...e.de>, <keescook@...omium.org>,
        <aarcange@...hat.com>, <daniel.sneddon@...ux.intel.com>,
        <longman@...hat.com>, <lukas.bulwahn@...il.com>,
        <peterz@...radead.org>, <kim.phillips@....com>
CC:     <linux-doc@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH -next] Documentation/hw-vuln: Update spectre doc

kindly ping

On 2022/8/30 20:36, Lin Yujun writed:
> commit 7c693f54c873691 ("x86/speculation: Add spectre_v2=ibrs
> option to support Kernel IBRS") adds the "ibrs " option  in
> Documentation/admin-guide/kernel-parameters.txt but omits it to
> Documentation/admin-guide/hw-vuln/spectre.rst, add it.
>
> Signed-off-by: Lin Yujun <linyujun809@...wei.com>
> ---
>   Documentation/admin-guide/hw-vuln/spectre.rst | 1 +
>   1 file changed, 1 insertion(+)
>
> diff --git a/Documentation/admin-guide/hw-vuln/spectre.rst b/Documentation/admin-guide/hw-vuln/spectre.rst
> index 2ce2a38cdd55..c4dcdb3d0d45 100644
> --- a/Documentation/admin-guide/hw-vuln/spectre.rst
> +++ b/Documentation/admin-guide/hw-vuln/spectre.rst
> @@ -613,6 +613,7 @@ kernel command line.
>                   eibrs                   enhanced IBRS
>                   eibrs,retpoline         enhanced IBRS + Retpolines
>                   eibrs,lfence            enhanced IBRS + LFENCE
> +                ibrs                    use IBRS to protect kernel
>   
>   		Not specifying this option is equivalent to
>   		spectre_v2=auto.