Re: [PATCH] x86/alternatives: Disable KASAN on text_poke_early() in apply_alternatives()

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Subject: Re: [PATCH] x86/alternatives: Disable KASAN on text_poke_early() in apply_alternatives()
From: Borislav Petkov <bp@xxxxxxxxx>
Date: Tue, 10 Oct 2023 11:12:35 +0200
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>, Ingo Molnar <mingo@xxxxxxxxxx>, Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx>, Peter Zijlstra <peterz@xxxxxxxxxxxxx>, x86@xxxxxxxxxx, "H. Peter Anvin" <hpa@xxxxxxxxx>, Andrey Ryabinin <ryabinin.a.a@xxxxxxxxx>, Alexander Potapenko <glider@xxxxxxxxxx>, Andrey Konovalov <andreyknvl@xxxxxxxxx>, Dmitry Vyukov <dvyukov@xxxxxxxxxx>, Vincenzo Frascino <vincenzo.frascino@xxxxxxx>, kasan-dev@xxxxxxxxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, Fei Yang <fei.yang@xxxxxxxxx>, stable@xxxxxxxxxxxxxxx
In-reply-to: <20231010084041.ut5sshyrofh27yyx@box.shutemov.name>

On Tue, Oct 10, 2023 at 11:40:41AM +0300, Kirill A. Shutemov wrote:
> __VIRTUAL_MASK_SHIFT used in many places. I don't think it is good idea to
> give up on patching completely.

Have you even looked at boot_cpu_has()'s asm?

-- 
Regards/Gruss,
    Boris.

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

Follow-Ups:
- Re: [PATCH] x86/alternatives: Disable KASAN on text_poke_early() in apply_alternatives()
  - From: Kirill A. Shutemov

References:
- [PATCH] x86/alternatives: Disable KASAN on text_poke_early() in apply_alternatives()
  - From: Kirill A. Shutemov
- Re: [PATCH] x86/alternatives: Disable KASAN on text_poke_early() in apply_alternatives()
  - From: Borislav Petkov
- Re: [PATCH] x86/alternatives: Disable KASAN on text_poke_early() in apply_alternatives()
  - From: Kirill A. Shutemov

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