linux-hardening - Re: [PATCH] mseal sysmap: add arch-support txt

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Message-ID: <1bbce89c-1efe-40cf-9085-ec4ec16f7996@lucifer.local>
Date: Thu, 13 Mar 2025 05:21:45 +0000
From: Lorenzo Stoakes <lorenzo.stoakes@...cle.com>
To: jeffxu@...omium.org
Cc: akpm@...ux-foundation.org, Liam.Howlett@...cle.com, agordeev@...ux.ibm.com,
        borntraeger@...ux.ibm.com, gor@...ux.ibm.com, hca@...ux.ibm.com,
        kees@...nel.org, linux-hardening@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-mm@...ck.org, svens@...ux.ibm.com,
        thomas.weissschuh@...utronix.de
Subject: Re: [PATCH] mseal sysmap: add arch-support txt

On Thu, Mar 13, 2025 at 12:06:23AM +0000, jeffxu@...omium.org wrote:
> From: Jeff Xu <jeffxu@...omium.org>
>
> Add Documentation/features/core/mseal_sys_mappings/arch-support.txt
>
> Signed-off-by: Jeff Xu <jeffxu@...omium.org>
> ---
>  .../core/mseal_sys_mappings/arch-support.txt  | 30 +++++++++++++++++++
>  1 file changed, 30 insertions(+)
>  create mode 100644 Documentation/features/core/mseal_sys_mappings/arch-support.txt
>
> diff --git a/Documentation/features/core/mseal_sys_mappings/arch-support.txt b/Documentation/features/core/mseal_sys_mappings/arch-support.txt
> new file mode 100644
> index 000000000000..8db637254de9
> --- /dev/null
> +++ b/Documentation/features/core/mseal_sys_mappings/arch-support.txt
> @@ -0,0 +1,30 @@
> +#
> +# Feature name:          mseal-system-mappings
> +#         Kconfig:       ARCH_SUPPORTS_MSEAL_SYSTEM_MAPPINGS
> +#         description:   arch supports mseal system mappings
> +#
> +    -----------------------
> +    |         arch |status|
> +    -----------------------
> +    |       alpha: | TODO |
> +    |         arc: | TODO |
> +    |         arm: |  N/A |
> +    |       arm64: |  ok  |
> +    |        csky: | TODO |
> +    |     hexagon: | TODO |
> +    |   loongarch: | TODO |
> +    |        m68k: | TODO |
> +    |  microblaze: | TODO |
> +    |        mips: | TODO |
> +    |       nios2: | TODO |
> +    |    openrisc: | TODO |
> +    |      parisc: | TODO |
> +    |     powerpc: | TODO |
> +    |       riscv: | TODO |
> +    |        s390: |  ok  |
> +    |          sh: | TODO |
> +    |       sparc: | TODO |
> +    |          um: | TODO |
> +    |         x86: |  ok  |
> +    |      xtensa: | TODO |
> +    -----------------------
> --
> 2.49.0.rc0.332.g42c0ae87b1-goog
>

I mean fine, but why not in the existing mseal documentation file where you
already document system mappings?

Plus I feel this need expansion a bit 'N/A' is because of being non-64 bit
right?

Actually this will change soon btw, based on Matthew's idea I plan to drop the
32-bit vma flags limit.

Anyway yeah, let's move that over there please.