Received-SPF: pass (google.com: domain of linux-kernel+bounces-118052-linux.lists.archive=gmail.com@vger.kernel.org designates 2604:1380:40f1:3f00::1 as permitted sender) client-ip=2604:1380:40f1:3f00::1;
Message-ID: <177f14cee291788df618a22398fdb027afe0f6c6.camel@xry111.site>
Subject: Re: [PATCH v2] x86/mm: Don't disable INVLPG if "incomplete Global
 INVLPG flushes" is fixed by microcode
From: Xi Ruoyao <xry111@xry111.site>
To: Michael Kelley <mhklinux@outlook.com>, Dave Hansen
	 <dave.hansen@linux.intel.com>
Cc: Andy Lutomirski <luto@kernel.org>, Peter Zijlstra
 <peterz@infradead.org>,  Thomas Gleixner <tglx@linutronix.de>, Ingo Molnar
 <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>, "H. Peter Anvin"
 <hpa@zytor.com>, "x86@kernel.org" <x86@kernel.org>,
 "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>, Dexuan Cui
 <decui@microsoft.com>
Date: Tue, 26 Mar 2024 05:41:40 +0800
In-Reply-To: <SN6PR02MB4157E96FB6980EC52134C830D4362@SN6PR02MB4157.namprd02.prod.outlook.com>
References: <20240324190503.116160-1-xry111@xry111.site>
	 <SN6PR02MB41576028614CB7FE9A11EBEBD4362@SN6PR02MB4157.namprd02.prod.outlook.com>
	 <c8dfca5f964701ce614d364ed7b18fa930aa2f61.camel@xry111.site>
	 <SN6PR02MB4157E96FB6980EC52134C830D4362@SN6PR02MB4157.namprd02.prod.outlook.com>
Content-Type: text/plain; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable
User-Agent: Evolution 3.52.0 
Precedence: bulk
MIME-Version: 1.0

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.

--=20
Xi Ruoyao <xry111@xry111.site>
School of Aerospace Science and Technology, Xidian University