Re: [PATCH v28 04/32] x86/cpufeatures: Introduce CPU setup and option parsing for CET

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Subject: Re: [PATCH v28 04/32] x86/cpufeatures: Introduce CPU setup and option parsing for CET
From: Borislav Petkov <bp@xxxxxxxxx>
Date: Tue, 10 Aug 2021 18:51:06 +0200
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>, "Ravi V. Shankar" <ravi.v.shankar@xxxxxxxxx>, Dave Martin <Dave.Martin@xxxxxxx>, Weijiang Yang <weijiang.yang@xxxxxxxxx>, Pengfei Xu <pengfei.xu@xxxxxxxxx>, Haitao Huang <haitao.huang@xxxxxxxxx>, Rick P Edgecombe <rick.p.edgecombe@xxxxxxxxx>
In-reply-to: <c7867ec7-f03e-8928-3cce-88eaafd1efa1@intel.com>
References: <20210722205219.7934-1-yu-cheng.yu@intel.com> <20210722205219.7934-5-yu-cheng.yu@intel.com> <YRFSg45dDMfeiGbt@zn.tnic> <c7867ec7-f03e-8928-3cce-88eaafd1efa1@intel.com>

On Tue, Aug 10, 2021 at 08:39:00AM -0700, Yu, Yu-cheng wrote:
> We have X86_FEATURE_IBT dependent on X86_FEATURE_SHSTK (patch #3).

Ah, do_clear_cpu_cap() will handle the deps, missed that.

Thx.

-- 
Regards/Gruss,
    Boris.

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

References:
- [PATCH v28 00/32] Control-flow Enforcement: Shadow Stack
  - From: Yu-cheng Yu
- [PATCH v28 04/32] x86/cpufeatures: Introduce CPU setup and option parsing for CET
  - From: Yu-cheng Yu
- Re: [PATCH v28 04/32] x86/cpufeatures: Introduce CPU setup and option parsing for CET
  - From: Borislav Petkov
- Re: [PATCH v28 04/32] x86/cpufeatures: Introduce CPU setup and option parsing for CET
  - From: Yu, Yu-cheng

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