linux-kernel - Re: [PATCH] mseal sysmap: update supported architectures

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Message-ID: <CABi2SkXajtCz=wBpuFLbiW7jDWRR4+5DRNB5p+Rniy1By1QGCA@mail.gmail.com>
Date: Mon, 17 Mar 2025 11:02:17 -0700
From: Jeff Xu <jeffxu@...omium.org>
To: Heiko Carstens <hca@...ux.ibm.com>
Cc: Andrew Morton <akpm@...ux-foundation.org>, Lorenzo Stoakes <lorenzo.stoakes@...cle.com>, 
	"Liam R . Howlett" <Liam.Howlett@...cle.com>, Kees Cook <kees@...nel.org>, 
	Alexander Gordeev <agordeev@...ux.ibm.com>, Sven Schnelle <svens@...ux.ibm.com>, 
	Vasily Gorbik <gor@...ux.ibm.com>, Christian Borntraeger <borntraeger@...ux.ibm.com>, 
	linux-kernel@...r.kernel.org, linux-mm@...ck.org, 
	linux-hardening@...r.kernel.org
Subject: Re: [PATCH] mseal sysmap: update supported architectures

On Mon, Mar 17, 2025 at 6:19 AM Heiko Carstens <hca@...ux.ibm.com> wrote:
>
> Add s390 to the list of architectures which support mseal sysmap.
>
> Signed-off-by: Heiko Carstens <hca@...ux.ibm.com>
> ---
>     Andrew, please feel free to merge this with "mseal sysmap: enable s390".
>
>  Documentation/userspace-api/mseal.rst | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/Documentation/userspace-api/mseal.rst b/Documentation/userspace-api/mseal.rst
> index 56aee46a9307..1dabfc29be0d 100644
> --- a/Documentation/userspace-api/mseal.rst
> +++ b/Documentation/userspace-api/mseal.rst
> @@ -143,7 +143,8 @@ Use cases
>    the CONFIG_MSEAL_SYSTEM_MAPPINGS seals all system mappings of this
>    architecture.
>
> -  The following architectures currently support this feature: x86-64 and arm64.
> +  The following architectures currently support this feature: x86-64, arm64,
> +  and s390.
>
>    WARNING: This feature breaks programs which rely on relocating
>    or unmapping system mappings. Known broken software at the time
> --
> 2.45.2
>
Reviewed-by:  Jeff Xu <jeffxu@...omium.org>

Thanks for this patch and caring about the documentation !
-Jeff