linux-kernel - Re: [PATCH v2 02/39] x86/cet/shstk: Add Kconfig option for Shadow Stack

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Message-ID: <Y0fYoG+BCYncSNmL@zn.tnic>
Date:   Thu, 13 Oct 2022 11:21:36 +0200
From:   Borislav Petkov <bp@...en8.de>
To:     "Edgecombe, Rick P" <rick.p.edgecombe@...el.com>
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Subject: Re: [PATCH v2 02/39] x86/cet/shstk: Add Kconfig option for Shadow
 Stack

On Thu, Oct 13, 2022 at 12:31:38AM +0000, Edgecombe, Rick P wrote:
> Yea, I was thinking to maybe just change it to
> CONFIG_X86_USER_SHADOW_STACK in show_smap_vma_flags(). In that function
> there is already CONFIG_ARM64_BTI and CONFIG_ARM64_MTE.

I was thinking exactly the same thing. :-)

> I'm not sure if there is any aversion to having arch CONFIGs in core
> code, but it's kind of nice to have all of the potentially conflicting
> strings in once place.

Yeah, ok.

I guess you can do the CONFIG_X86_USER_SHADOW_STACK thing for the sake
of simplicity. We have *waaay* too many Kconfig symbols and we should
introduce only the least amount of new ones.

Thx.

-- 
Regards/Gruss,
    Boris.

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