From: Andy Lutomirski <luto@amacapital.net>
To: Jari Ruusu <jari.ruusu@gmail.com>
Cc: Luis Chamberlain <mcgrof@kernel.org>,
Borislav Petkov <bp@alien8.de>, Fenghua Yu <fenghua.yu@intel.com>,
Linus Torvalds <torvalds@linux-foundation.org>,
johannes.berg@intel.com, linux-kernel@vger.kernel.org,
stable@vger.kernel.org, Hans de Goede <hdegoede@redhat.com>,
Andy Lutomirski <luto@kernel.org>
Subject: Re: Fix built-in early-load Intel microcode alignment
Date: Wed, 15 Jan 2020 11:00:29 -0800 [thread overview]
Message-ID: <5C216684-6FDF-41B5-9F51-89DC295F6DDC@amacapital.net> (raw)
In-Reply-To: <CACMCwJLJCA2iXS0QMKKAWQv252oUcmfsNvwDNP5+4Z_9VB-rTg@mail.gmail.com>
> On Jan 15, 2020, at 10:46 AM, Jari Ruusu <jari.ruusu@gmail.com> wrote:
>
> On 1/15/20, Luis Chamberlain <mcgrof@kernel.org> wrote:
>>> On Mon, Jan 13, 2020 at 09:58:25PM +0200, Jari Ruusu wrote:
>>> Before that 16-byte alignment patch was applied, my only one
>>> microcode built-in BLOB was "accidentally" 16-byte aligned.
>>
>> How did it accidentially get 16-byte aligned?
>
> Old code aligned it to 8-bytes.
> There is 50/50-chance of it also being 16-byte aligned.
> So it ended up being both 8-byte and 16-byte aligned.
>
>> Also, how do you *know* something is broken right now?
>
> I haven't spotted brokenness in Linux microcode loader other
> than that small alignment issue.
>
> However, I can confirm that there are 2 microcode updates newer
> than what my laptop computer's latest BIOS includes. Both newer
> ones (20191115 and 20191112) are unstable on my laptop computer
> i5-7200U (fam 6 model 142 step 9 pf 0x80). Hard lockups with both
> of them. Back to BIOS microcode for now.
>
Hard lockup when loaded or hard lockup after loading?
> --
> Jari Ruusu 4096R/8132F189 12D6 4C3A DCDA 0AA4 27BD ACDF F073 3C80 8132 F189
next prev parent reply other threads:[~2020-01-15 19:00 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-01-12 13:00 Fix built-in early-load Intel microcode alignment Jari Ruusu
2020-01-12 13:03 ` Jari Ruusu
2020-01-12 14:02 ` Greg KH
2020-01-13 6:30 ` Jari Ruusu
2020-01-13 6:42 ` Greg KH
2020-01-13 15:47 ` Luis Chamberlain
2020-01-13 19:44 ` Linus Torvalds
2020-01-15 2:27 ` Luis Chamberlain
2020-01-18 20:10 ` Bjorn Andersson
2020-01-13 19:58 ` Jari Ruusu
2020-01-13 20:08 ` Borislav Petkov
2020-01-13 20:30 ` Jari Ruusu
2020-01-13 20:46 ` Borislav Petkov
2020-01-15 2:15 ` Luis Chamberlain
2020-01-15 18:46 ` Jari Ruusu
2020-01-15 18:58 ` Luis Chamberlain
2020-01-15 19:41 ` Linus Torvalds
2020-01-15 19:00 ` Andy Lutomirski [this message]
2020-01-15 19:15 ` Jari Ruusu
2020-01-15 19:49 ` Linus Torvalds
2020-01-16 6:55 ` Jari Ruusu
2020-01-16 19:16 ` Raj, Ashok
2020-01-17 9:47 ` Jari Ruusu
2020-02-03 20:10 ` Luis Chamberlain
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