Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67;
Date:   Wed, 18 Apr 2018 12:07:21 +0200
From:   Borislav Petkov <bp@suse.de>
To:     Vitezslav Samel <vitezslav@samel.cz>
Cc:     Ashok Raj <ashok.raj@intel.com>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        linux-kernel@vger.kernel.org
Subject: Re: 4.15.17 regression: bisected: timeout during microcode update
Message-ID: <20180418100721.GA5866@pd.tnic>
References: <20180418081140.GA2439@pc11.op.pod.cz>
MIME-Version: 1.0
Content-Type: text/plain; charset=utf-8
Content-Disposition: inline
Content-Transfer-Encoding: 8bit
In-Reply-To: <20180418081140.GA2439@pc11.op.pod.cz>
User-Agent: Mutt/1.9.3 (2018-01-21)
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

On Wed, Apr 18, 2018 at 10:11:40AM +0200, Vitezslav Samel wrote:
>   Could be done anything to prevent this panic?

Yes, for starters, is there anything preventing you from using an initrd
and doing early microcode loading?

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/Documentation/x86/microcode.txt

If no, consider doing that and not using the late method which is
problematic at best.

-- 
Regards/Gruss,
    Boris.

SUSE Linux GmbH, GF: Felix Imendörffer, Jane Smithard, Graham Norton, HRB 21284 (AG Nürnberg)
--