Re: [PATCH v9 14/42] mm: Introduce VM_SHADOW_STACK for shadow stack memory

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To: Rick Edgecombe <rick.p.edgecombe@xxxxxxxxx>
Subject: Re: [PATCH v9 14/42] mm: Introduce VM_SHADOW_STACK for shadow stack memory
From: Mark Brown <broonie@xxxxxxxxxx>
Date: Thu, 15 Jun 2023 00:31:55 +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>, Borislav Petkov <bp@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, szabolcs.nagy@xxxxxxx, torvalds@xxxxxxxxxxxxxxxxxxxx, Yu-cheng Yu <yu-cheng.yu@xxxxxxxxx>, Pengfei Xu <pengfei.xu@xxxxxxxxx>
In-reply-to: <20230613001108.3040476-15-rick.p.edgecombe@intel.com>
References: <20230613001108.3040476-1-rick.p.edgecombe@intel.com> <20230613001108.3040476-15-rick.p.edgecombe@intel.com>

On Mon, Jun 12, 2023 at 05:10:40PM -0700, Rick Edgecombe wrote:
> From: Yu-cheng Yu <yu-cheng.yu@xxxxxxxxx>
> 
> New hardware extensions implement support for shadow stack memory, such
> as x86 Control-flow Enforcement Technology (CET). Add a new VM flag to
> identify these areas, for example, to be used to properly indicate shadow
> stack PTEs to the hardware.

Reviewed-by: Mark Brown <broonie@xxxxxxxxxx>
Tested-by: Mark Brown <broonie@xxxxxxxxxx>

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References:
- [PATCH v9 00/42] Shadow stacks for userspace
  - From: Rick Edgecombe
- [PATCH v9 14/42] mm: Introduce VM_SHADOW_STACK for shadow stack memory
  - From: Rick Edgecombe

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