linux-kernel - Re: [PATCH 0/7] IBRS patch series

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Date:   Fri, 05 Jan 2018 14:47:45 +0100
From:   Yves-Alexis Perez <corsac@...ian.org>
To:     Greg KH <gregkh@...uxfoundation.org>
Cc:     Henrique de Moraes Holschuh <hmh@...ian.org>,
        Tim Chen <tim.c.chen@...ux.intel.com>,
        Justin Forbes <jmforbes@...uxtx.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Andy Lutomirski <luto@...nel.org>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Dave Hansen <dave.hansen@...el.com>,
        Andrea Arcangeli <aarcange@...hat.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 0/7] IBRS patch series

On Fri, 2018-01-05 at 14:28 +0100, Greg KH wrote:
> > iucode-tool -L -tr n10ur16w.iso |grep 2017-11
> >    001/020: sig 0x000306d4, pf_mask 0xc0, 2017-11-17, rev 0x0028, size
> > 18432
> 
> That's been out for a while now:
>         https://downloadcenter.intel.com/download/27337/Linux-Processor-Micr
> ocode-Data-File
> 
> so I really don't think this is an "update" yet.

Actually for my processor (0x000306d4 / i5-5200U) this release (20171117) only
contains:

  050/001: sig 0x000306d4, pf_mask 0xc0, 2017-01-27, rev 0x0025, size 17408

I find it weird that the Intel release from 2017-11-17 doesn't contain a
microcode file supposedly released on the same day, but it seems to be the
case.

> I saw a bios update for my Dell laptop dated December 28, but it didn't
> seem to change anything with the cpuids or microcode status from before.

Not sure which distribution you use nowadays but Henrique just pushed a
microcode update to Debian with some collected microcodes:

https://tracker.debian.org/news/899110

Obviously it lacks a *lot* of processors (especially pre-Haswell).
> 
> A hard answer to what "soon" means here would be nice to get, as I'm
> seeing a lot of misunderstanding floating around right now :(

Agreed, but I'm not sure who can provide the information.

Regards,
-- 
Yves-Alexis
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