linux-kernel - Re: [PATCH] x86/microcode: Add an option to reload microcode even if revision is unchanged

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Message-ID: <20190905194950.GH19246@zn.tnic>
Date:   Thu, 5 Sep 2019 21:49:50 +0200
From:   Borislav Petkov <bp@...en8.de>
To:     "Raj, Ashok" <ashok.raj@...el.com>
Cc:     Boris Ostrovsky <boris.ostrovsky@...cle.com>,
        Mihai Carabas <mihai.carabas@...cle.com>,
        "H. Peter Anvin" <hpa@...or.com>, Ingo Molnar <mingo@...hat.com>,
        Jon Grimm <Jon.Grimm@....com>, kanth.ghatraju@...cle.com,
        konrad.wilk@...cle.com, patrick.colp@...cle.com,
        Thomas Gleixner <tglx@...utronix.de>,
        Tom Lendacky <thomas.lendacky@....com>,
        x86-ml <x86@...nel.org>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] x86/microcode: Add an option to reload microcode even if
 revision is unchanged

On Thu, Sep 05, 2019 at 12:40:44PM -0700, Raj, Ashok wrote:
> The original description said to load a new microcode file, the content
> could have changed, but revision in the header hasn't increased.

How does the hardware even accept a revision which is the same as the
one already loaded?

-- 
Regards/Gruss,
    Boris.

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