linux-kernel - Re: [PATCH v2] x86/mm: Don't disable INVLPG if "incomplete Global INVLPG flushes" is fixed by microcode

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Date: Tue, 26 Mar 2024 05:41:40 +0800
From: Xi Ruoyao <xry111@...111.site>
To: Michael Kelley <mhklinux@...look.com>, Dave Hansen
	 <dave.hansen@...ux.intel.com>
Cc: Andy Lutomirski <luto@...nel.org>, Peter Zijlstra
 <peterz@...radead.org>,  Thomas Gleixner <tglx@...utronix.de>, Ingo Molnar
 <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>, "H. Peter Anvin"
 <hpa@...or.com>, "x86@...nel.org" <x86@...nel.org>,
 "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>, Dexuan Cui
 <decui@...rosoft.com>
Subject: Re: [PATCH v2] x86/mm: Don't disable INVLPG if "incomplete Global
 INVLPG flushes" is fixed by microcode

On Mon, 2024-03-25 at 20:06 +0000, Michael Kelley wrote:

/* snip */

> I haven't done a complete census, but there don't seem to be
> that many places in x86 code where the microcode version is
> checked. Several (most?) already have some kind of "out" when
> running on a hypervisor -- like bad_spectre_microcode(), and
> apic_validate_deadline_timer().

So I've sent V3 as
https://lore.kernel.org/all/20240325212818.125053-1-xry111@xry111.site/
with the check added.

-- 
Xi Ruoyao <xry111@...111.site>
School of Aerospace Science and Technology, Xidian University