linux-kernel - Re: [RFC PATCH 04/15] x86/pks: Preserve the PKRS MSR on context switch

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Message-ID: <17c6ebbc-ffa4-7c60-f5e8-faca062c59d1@intel.com>
Date:   Tue, 14 Jul 2020 11:56:31 -0700
From:   Dave Hansen <dave.hansen@...el.com>
To:     Ira Weiny <ira.weiny@...el.com>,
        Peter Zijlstra <peterz@...radead.org>
Cc:     Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        Andy Lutomirski <luto@...nel.org>,
        Fenghua Yu <fenghua.yu@...el.com>, x86@...nel.org,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        Dan Williams <dan.j.williams@...el.com>,
        Vishal Verma <vishal.l.verma@...el.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-nvdimm@...ts.01.org, linux-fsdevel@...r.kernel.org,
        linux-mm@...ck.org, linux-kselftest@...r.kernel.org
Subject: Re: [RFC PATCH 04/15] x86/pks: Preserve the PKRS MSR on context
 switch

On 7/14/20 11:53 AM, Ira Weiny wrote:
>>> The PKRS MSR is defined as a per-core register.

Just to be clear, PKRS is a per-logical-processor register, just like
PKRU.  The "per-core" thing here is a typo.