linux-kernel - Re: [PATCH v3 3/4] x86/mm: Flush global TLB when switching to trampoline page-table

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Message-ID: <03994224-abba-4551-9f9d-1360af69c78e@intel.com>
Date:   Fri, 1 Oct 2021 09:13:51 -0700
From:   Dave Hansen <dave.hansen@...el.com>
To:     Joerg Roedel <joro@...tes.org>, x86@...nel.org
Cc:     Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        hpa@...or.com, Dave Hansen <dave.hansen@...ux.intel.com>,
        Andy Lutomirski <luto@...nel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Joerg Roedel <jroedel@...e.de>,
        Mike Rapoport <rppt@...nel.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Brijesh Singh <brijesh.singh@....com>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 3/4] x86/mm: Flush global TLB when switching to
 trampoline page-table

On 10/1/21 8:48 AM, Joerg Roedel wrote:
> Move the switching code into a function so that it can be re-used and
> add a global TLB flush. This makes sure that usage of memory which is
> not mapped in the trampoline page-table is reliably caught.

This looks fine.  But, just to be clear, nothing in this series reuses
the code, right?