Re: [PATCH v6 29/41] x86/shstk: Add user-mode shadow stack support

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To: Rick Edgecombe <rick.p.edgecombe@xxxxxxxxx>
Subject: Re: [PATCH v6 29/41] x86/shstk: Add user-mode shadow stack support
From: Borislav Petkov <bp@xxxxxxxxx>
Date: Fri, 24 Feb 2023 13:22:01 +0100
Cc: x86@xxxxxxxxxx, "H . Peter Anvin" <hpa@xxxxxxxxx>, Thomas Gleixner <tglx@xxxxxxxxxxxxx>, Ingo Molnar <mingo@xxxxxxxxxx>, linux-kernel@xxxxxxxxxxxxxxx, linux-doc@xxxxxxxxxxxxxxx, linux-mm@xxxxxxxxx, linux-arch@xxxxxxxxxxxxxxx, linux-api@xxxxxxxxxxxxxxx, Arnd Bergmann <arnd@xxxxxxxx>, Andy Lutomirski <luto@xxxxxxxxxx>, Balbir Singh <bsingharora@xxxxxxxxx>, Cyrill Gorcunov <gorcunov@xxxxxxxxx>, Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx>, Eugene Syromiatnikov <esyr@xxxxxxxxxx>, Florian Weimer <fweimer@xxxxxxxxxx>, "H . J . Lu" <hjl.tools@xxxxxxxxx>, Jann Horn <jannh@xxxxxxxxxx>, Jonathan Corbet <corbet@xxxxxxx>, Kees Cook <keescook@xxxxxxxxxxxx>, Mike Kravetz <mike.kravetz@xxxxxxxxxx>, Nadav Amit <nadav.amit@xxxxxxxxx>, Oleg Nesterov <oleg@xxxxxxxxxx>, Pavel Machek <pavel@xxxxxx>, Peter Zijlstra <peterz@xxxxxxxxxxxxx>, Randy Dunlap <rdunlap@xxxxxxxxxxxxx>, Weijiang Yang <weijiang.yang@xxxxxxxxx>, "Kirill A . Shutemov" <kirill.shutemov@xxxxxxxxxxxxxxx>, John Allen <john.allen@xxxxxxx>, kcc@xxxxxxxxxx, eranian@xxxxxxxxxx, rppt@xxxxxxxxxx, jamorris@xxxxxxxxxxxxxxxxxxx, dethoma@xxxxxxxxxxxxx, akpm@xxxxxxxxxxxxxxxxxxxx, Andrew.Cooper3@xxxxxxxxxx, christina.schimpe@xxxxxxxxx, david@xxxxxxxxxx, debug@xxxxxxxxxxxx, Yu-cheng Yu <yu-cheng.yu@xxxxxxxxx>
In-reply-to: <20230218211433.26859-30-rick.p.edgecombe@intel.com>
References: <20230218211433.26859-1-rick.p.edgecombe@intel.com> <20230218211433.26859-30-rick.p.edgecombe@intel.com>

On Sat, Feb 18, 2023 at 01:14:21PM -0800, Rick Edgecombe wrote:
> Do not support IA32 emulation or x32.

Because? Simplicity?

No one cares about 32-bit?

Thx.

-- 
Regards/Gruss,
    Boris.

https://people.kernel.org/tglx/notes-about-netiquette

Follow-Ups:
- Re: [PATCH v6 29/41] x86/shstk: Add user-mode shadow stack support
  - From: Edgecombe, Rick P

References:
- [PATCH v6 00/41] Shadow stacks for userspace
  - From: Rick Edgecombe
- [PATCH v6 29/41] x86/shstk: Add user-mode shadow stack support
  - From: Rick Edgecombe

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