From mboxrd@z Thu Jan 1 00:00:00 1970 Date: Thu, 8 Feb 2018 17:39:40 +0100 From: Greg KH To: Rolf Neugebauer Cc: Borislav Petkov , Jia Zhang , Thomas Gleixner , Tony Luck , Ingo Molnar , "H. Peter Anvin" , x86@kernel.org, LKML Subject: Re: x86/microcode/intel: Division by zero panic in 4.9.79 and 4.4.114 Message-ID: <20180208163940.GD9421@kroah.com> References: <20180206142444.7xxegyyyfwskwrxl@pd.tnic> <20180207143428.GA31944@kroah.com> <20180207181254.GC8698@pd.tnic> <20180208145348.GC7964@pd.tnic> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.9.3 (2018-01-21) X-Mailing-List: linux-kernel@vger.kernel.org List-ID: On Thu, Feb 08, 2018 at 04:25:58PM +0000, Rolf Neugebauer wrote: > On Thu, Feb 8, 2018 at 2:53 PM, Borislav Petkov wrote: > > On Thu, Feb 08, 2018 at 01:55:48PM +0000, Rolf Neugebauer wrote: > >> On the 4.4 kernel, 1f161f67a272c ("x86/microcode: Do the family check > >> first") does not apply cleanly. Looks like it relies on 309aac77768c0 > >> ("x86/microcode: Decrease CPUID use") and 7a93a40be23e5 > >> ("x86/microcode: Remove local vendor variable") as well. These don't > >> apply cleanly either. > > > > It figures. The backporting game is hm, well, a fun one. :-) > > > >> Should I just manually backport the functionality of 1f161f67a272c? > > > > Yeah, try that first. > > Here it is below (same disclaimer about crappy mail client). If Boris > is fine with the changes, Greg, I can send it properly with "git > send-email" if needed. Can you also send this for 4.9? It should need it as well. And at first glance, it looks good to me. thanks for doing this, greg k-h