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

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Subject: Re: [PATCH 4.9 43/92] x86/pti: Do not enable PTI on CPUs which are not vulnerable to Meltdown
From: Arjan van de Ven <arjan@xxxxxxxxxxxxxxx>
Date: Tue, 13 Feb 2018 07:09:44 -0800
Cc: linux-kernel@xxxxxxxxxxxxxxx, stable@xxxxxxxxxxxxxxx, David Woodhouse <dwmw@xxxxxxxxxxxx>, Thomas Gleixner <tglx@xxxxxxxxxxxxx>, Borislav Petkov <bp@xxxxxxx>, Dave Hansen <dave.hansen@xxxxxxxxx>, gnomes@xxxxxxxxxxxxxxxxxxx, ak@xxxxxxxxxxxxxxx, ashok.raj@xxxxxxxxx, karahmed@xxxxxxxxx, torvalds@xxxxxxxxxxxxxxxxxxxx, peterz@xxxxxxxxxxxxx, Borislav Petkov <bp@xxxxxxxxx>, pbonzini@xxxxxxxxxx, tim.c.chen@xxxxxxxxxxxxxxx
In-reply-to: <20180213150007.GJ26982@kroah.com>
User-agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:52.0) Gecko/20100101 Thunderbird/52.6.0


So, any hints on what you think should be the correct fix here?


the patch sure looks correct to me, it now has a nice table for CPU IDs
including all of AMD (and soon hopefully the existing Intel ones that are not exposed to meltdown)

Follow-Ups:
- Re: [PATCH 4.9 43/92] x86/pti: Do not enable PTI on CPUs which are not vulnerable to Meltdown
  - From: Andi Kleen
- Re: [PATCH 4.9 43/92] x86/pti: Do not enable PTI on CPUs which are not vulnerable to Meltdown
  - From: Nick Lowe

References:
- [PATCH 4.9 00/92] 4.9.81-stable review
  - From: Greg Kroah-Hartman
- [PATCH 4.9 43/92] x86/pti: Do not enable PTI on CPUs which are not vulnerable to Meltdown
  - From: Greg Kroah-Hartman
- Re: [PATCH 4.9 43/92] x86/pti: Do not enable PTI on CPUs which are not vulnerable to Meltdown
  - From: Nick Lowe
- Re: [PATCH 4.9 43/92] x86/pti: Do not enable PTI on CPUs which are not vulnerable to Meltdown
  - From: Greg Kroah-Hartman

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