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From:   Linus Torvalds <torvalds@linux-foundation.org>
Date:   Mon, 3 Apr 2023 09:21:27 -0700
Message-ID: <CAHk-=whY8tkKJoFjzP1-kR5rqCmgTEiX2i+GJgjdJcn+q+3HTQ@mail.gmail.com>
Subject: Re: [RFC PATCH 2/7] x86/entry: Add IST main stack
To:     Lai Jiangshan <jiangshanlai@gmail.com>
Cc:     linux-kernel@vger.kernel.org,
        Lai Jiangshan <jiangshan.ljs@antgroup.com>,
        "H. Peter Anvin" <hpa@linux.intel.com>,
        Andi Kleen <ak@linux.intel.com>,
        Andrew Cooper <andrew.cooper3@citrix.com>,
        Andy Lutomirski <luto@kernel.org>,
        Asit Mallick <asit.k.mallick@intel.com>,
        Cfir Cohen <cfir@google.com>,
        Dan Williams <dan.j.williams@intel.com>,
        Dave Hansen <dave.hansen@intel.com>,
        David Kaplan <David.Kaplan@amd.com>,
        David Rientjes <rientjes@google.com>,
        Dirk Hohndel <dirkhh@vmware.com>,
        Erdem Aktas <erdemaktas@google.com>,
        Jan Kiszka <jan.kiszka@siemens.com>,
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        Kirill Shutemov <kirill.shutemov@linux.intel.com>,
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        linux-coco@lists.linux.dev, x86@kernel.org,
        Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
        Dave Hansen <dave.hansen@linux.intel.com>,
        "H. Peter Anvin" <hpa@zytor.com>, Jonathan Corbet <corbet@lwn.net>,
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On Mon, Apr 3, 2023 at 7:05=E2=80=AFAM Lai Jiangshan <jiangshanlai@gmail.co=
m> wrote:
>
> diff --git a/Documentation/x86/kernel-stacks.rst b/Documentation/x86/kern=
el-stacks.rst
> index 6b0bcf027ff1..be89acf302da 100644
> --- a/Documentation/x86/kernel-stacks.rst
> +++ b/Documentation/x86/kernel-stacks.rst
> @@ -105,6 +105,8 @@ The currently assigned IST stacks are:
>    middle of switching stacks.  Using IST for MCE events avoids making
>    assumptions about the previous state of the kernel stack.
>
> +* ESTACK_IST. bla bla
> +
>  For more details see the Intel IA32 or AMD AMD64 architecture manuals.

Maybe the cover letter description could be used here, rather than the
"bla bla" placeholder?

              Linus