linux-kernel - Re: [PATCH 4.9 43/92] x86/pti: Do not enable PTI on CPUs which are not vulnerable to Meltdown

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Message-ID: <CADSoG1vtapcUq42akvdHzGS73MBuMYoWH7m-YiK0X2SBoBcYvQ@mail.gmail.com>
Date:   Fri, 16 Feb 2018 16:56:54 +0000
From:   Nick Lowe <nick.lowe@...il.com>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     Arjan van de Ven <arjan@...ux.intel.com>,
        linux-kernel@...r.kernel.org, stable@...r.kernel.org,
        David Woodhouse <dwmw@...zon.co.uk>,
        Thomas Gleixner <tglx@...utronix.de>,
        Borislav Petkov <bp@...e.de>,
        Dave Hansen <dave.hansen@...el.com>,
        gnomes@...rguk.ukuu.org.uk, ak@...ux.intel.com,
        ashok.raj@...el.com, karahmed@...zon.de,
        torvalds@...ux-foundation.org, peterz@...radead.org,
        Borislav Petkov <bp@...en8.de>, pbonzini@...hat.com,
        tim.c.chen@...ux.intel.com
Subject: Re: [PATCH 4.9 43/92] x86/pti: Do not enable PTI on CPUs which are
 not vulnerable to Meltdown

Hi,

This should use boot_cpu_has_bug(X86_BUG_CPU_MELTDOWN)) - I am
preparing patches.

Best,

Nick