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Message-ID: <YXf7hBEbW0CmwYwz@zn.tnic>
Date: Tue, 26 Oct 2021 14:58:44 +0200
From: Borislav Petkov <bp@...en8.de>
To: Joerg Roedel <joro@...tes.org>
Cc: x86@...nel.org, Thomas Gleixner <tglx@...utronix.de>,
Ingo Molnar <mingo@...hat.com>, 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 2/4] x86/mm/64: Flush global TLB on boot and AP bringup
On Tue, Oct 26, 2021 at 11:55:44AM +0200, Borislav Petkov wrote:
> > + movq %cr4, %rcx
> > + movq %rcx, %rax
> > + xorq $X86_CR4_PGE, %rcx
> > + movq %rcx, %cr4
> > + movq %rax, %cr4
Also, I'm wondering if you could compact this even more by defining a
function toggling the PGE bit and calling it from everywhere, even from
asm.
--
Regards/Gruss,
Boris.
https://people.kernel.org/tglx/notes-about-netiquette
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