linux-kernel - Re: [PATCH 7/7] x86/microcode: Recheck IBRS features on microcode reload

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Message-ID: <20180105134715.GA22699@kroah.com>
Date:   Fri, 5 Jan 2018 14:47:15 +0100
From:   Greg KH <gregkh@...uxfoundation.org>
To:     Borislav Petkov <bp@...en8.de>
Cc:     Andrea Arcangeli <aarcange@...hat.com>,
        Tim Chen <tim.c.chen@...ux.intel.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Andy Lutomirski <luto@...nel.org>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Dave Hansen <dave.hansen@...el.com>,
        Andi Kleen <ak@...ux.intel.com>,
        Arjan Van De Ven <arjan.van.de.ven@...el.com>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 7/7] x86/microcode: Recheck IBRS features on microcode
 reload

On Fri, Jan 05, 2018 at 02:37:17PM +0100, Borislav Petkov wrote:
> On Fri, Jan 05, 2018 at 02:32:17PM +0100, Greg KH wrote:
> > Does it really matter?  Rescanning everything can't hurt here, and it
> > shouldn't be noticable in any boot time chart.  I feel like arguing
> > about tiny stuff like this takes away from the obvious other problems
> > this whole patch series had :(
> 
> It does because others will come and copy this and then we're stuck
> with cleaning up the mess. The whole CPUID parsing needs a much desired
> cleanup but there's other more pressing shit going on..

Ok, fair enough, and Tim already said he fixed this up in his series,
sorry for the noise.

greg k-h