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

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Message-ID: <3fa6ce91abbfa2a45308acc13df831d5497bfa7c.camel@intel.com>
Date:   Mon, 3 Oct 2022 19:50:17 +0000
From:   "Edgecombe, Rick P" <rick.p.edgecombe@...el.com>
To:     "Shankar, Ravi V" <ravi.v.shankar@...el.com>,
        "bsingharora@...il.com" <bsingharora@...il.com>,
        "hpa@...or.com" <hpa@...or.com>,
        "Syromiatnikov, Eugene" <esyr@...hat.com>,
        "peterz@...radead.org" <peterz@...radead.org>,
        "rdunlap@...radead.org" <rdunlap@...radead.org>,
        "keescook@...omium.org" <keescook@...omium.org>,
        "dave.hansen@...ux.intel.com" <dave.hansen@...ux.intel.com>,
        "kirill.shutemov@...ux.intel.com" <kirill.shutemov@...ux.intel.com>,
        "Eranian, Stephane" <eranian@...gle.com>,
        "linux-mm@...ck.org" <linux-mm@...ck.org>,
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        "rppt@...nel.org" <rppt@...nel.org>,
        "mingo@...hat.com" <mingo@...hat.com>,
        "Hansen, Dave" <dave.hansen@...el.com>,
        "corbet@....net" <corbet@....net>,
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        "gorcunov@...il.com" <gorcunov@...il.com>
CC:     "Yu, Yu-cheng" <yu-cheng.yu@...el.com>
Subject: Re: [PATCH v2 02/39] x86/cet/shstk: Add Kconfig option for Shadow
 Stack

On Mon, 2022-10-03 at 12:42 -0700, Dave Hansen wrote:
> On 9/29/22 15:28, Rick Edgecombe wrote:
> > +config X86_SHADOW_STACK
> > +     prompt "X86 Shadow Stack"
> > +     def_bool n
> > +     depends on ARCH_HAS_SHADOW_STACK
> > +     select ARCH_USES_HIGH_VMA_FLAGS
> > +     help
> > +       Shadow Stack protection is a hardware feature that detects
> > function
> > +       return address corruption. Today the kernel's support is
> > limited to
> > +       virtualizing it in KVM guests.
> > +
> 
> Is this help text up to date?  It seems a bit at odds with the series
> title.

Arg, yes. This patch got screwed up when I converted it back and forth
for the KVM series.