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

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Message-ID: <87h710v6ap.fsf@meer.lwn.net>
Date:   Wed, 21 Sep 2022 14:09:02 -0600
From:   Jonathan Corbet <corbet@....net>
To:     Lin Yujun <linyujun809@...wei.com>, 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, linyujun809@...wei.com
Cc:     linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH -next] Documentation/hw-vuln: Update spectre doc

Lin Yujun <linyujun809@...wei.com> writes:

> 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
>  
Applied (after reformatting the "commit" line to prevent linux-next
warnings), thanks.

jon